Are you a maintainer with just a short amount of time? The following kinds of pull requests could be relevant for you.
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
awaiting-author
|
205/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
67 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'jcommelin', 'mathlib-dependent-issues', 'vlad902', 'wwylele'] |
nobody |
12-84869 12 days ago |
12-84869 12 days ago |
146-39214 146 days |
| 41983 |
marcelolynch author:marcelolynch |
fix(cache): avoid misleading message on refs not built "on purpose" |
`cache get` on a fork printed a "no cache found for HEAD" note whenever the per-SHA fork marker was absent, even when every file was then served from mathlib's master cache — which is always the case for a tooling-only PR (its CI build stages zero files, so the upload job and the marker are skipped by design). Reported in https://github.com/leanprover-community/mathlib4/pull/41707#discussion_r3602459565.
The note is now printed after the download rounds and only when files are actually missing; `cache query`'s no-result message names both possible causes (CI hasn't built the commits, or its builds had nothing fork-specific to upload) instead of claiming the first.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
CI
LLM-generated
maintainer-merge
|
203/87 |
Cache/Main.lean,Cache/Query.lean,Cache/Requests.lean,Cache/Test.lean,Cache/Warning.lean |
5 |
4 |
['Vierkantor', 'github-actions', 'joneugster', 'marcelolynch'] |
nobody |
11-48705 11 days ago |
47-48063 47 days ago |
47-48002 47 days |
| 41938 |
rosborn author:rosborn |
chore(Linter/DirectoryDependency): move forbidden directories into a JSON file |
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>
---
This PR adopts the work from #26088 and #26406.
The JSON file was generated programmatically from the previous hard-coded array and verified to produce an identical relation, with one deliberate exception: the entry ``(`MathlibTest.Header, `Mathlib.Deprecated)`` was dropped.
If this looks good, I can continue work on `allowedImportDirs` and `overrideAllowedImportDirs`.
<!-- Your PR title will become the first line of the commit message.
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|
t-linter
maintainer-merge
merge-conflict
awaiting-author
|
408/318 |
Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json |
3 |
19 |
['github-actions', 'grunweg', 'jcommelin', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'rosborn'] |
grunweg assignee:grunweg |
9-78013 9 days ago |
16-76621 16 days ago |
33-83850 33 days |
| 43203 |
SnirBroshi author:SnirBroshi |
fix(Tactic/FastInstance): telescope over instance families |
Fix `fast_instance%` to support for instance families (e.g. `Π i, Group (G i)` and `DecidableEq α`) (regression since #36420), both for the top-level instance and nested instances.
---
The `forallTelescopeReducing` only telescoped the `expectedType` but not `inst`; we have to `mkAppN` and give it the telescope metavariables.
Also moved the `forallTelescopeReducing` call to inside the function to restore support for nested instance families as well.
Added a bunch of tests, and also tweaked the docstring of `inferInstanceAs%` since it was inaccurate after Lean shipped a new `inferInstanceAs` elaborator (which wraps instances in auxiliary semireducible defs).
[#mathlib4 > fast_instance% recursion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/fast_instance.25.20recursion/with/619696862)
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[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
|
139/7 |
Mathlib/Tactic/FastInstance.lean,MathlibTest/FastInstance.lean |
2 |
16 |
['JovanGerb', 'SnirBroshi', 'Vierkantor', 'github-actions'] |
nobody |
9-63583 9 days ago |
12-67553 12 days ago |
15-65108 15 days |
| 38228 |
kim-em author:kim-em |
ci: block merging PRs that increase technical debt unless reviewed |
This PR adds a merge gate for technical debt increases.
When the existing technical debt metrics script reports an increase, the `build` job adds an `increases-technical-debt` label. A `check-technical-debt` job then adds `blocked-by-increases-technical-debt`, which blocks bors.
A reviewer can add `allow-increases-technical-debt` to unblock after confirming the increase is acceptable.
### Fail-closed detection
The detection greps for the *safe* patterns (`Decrease in tech debt:` / `No changes to technical debt.`) rather than for `Increase`. If `mathlib-ci` changes the script's output wording, the label is added (fail closed) rather than silently skipped (fail open).
### Labels (three-label pattern, same as #38225)
| Label | Managed by | Purpose |
|---|---|---|
| `increases-technical-debt` | `build` job (tech debt script) | Factual: this PR increases debt |
| `blocked-by-increases-technical-debt` | `check-technical-debt` job | Operational: blocks bors |
| `allow-increases-technical-debt` | Reviewer | Override: reviewer approves the increase |
Bors's `block_labels` has no conditional logic, so we need the derived `blocked-by-increases-technical-debt` label to express the conjunction "increases-technical-debt AND NOT allow-increases-technical-debt".
False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/increases-technical-debt.20label).
🤖 Prepared with Claude Code
-----------
- [x] depends on: leanprover-community/mathlib-ci#28 |
CI
LLM-generated
maintainer-merge
|
92/2 |
.github/workflows/PR_summary.yml,bors.toml |
2 |
16 |
['felixpernegger', 'github-actions', 'grunweg', 'jcommelin', 'joneugster', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
9-60392 9 days ago |
18-9951 18 days ago |
67-35520 67 days |
| 40412 |
JovanGerb author:JovanGerb |
feat(Linter/Header): lint against imports from `Init` |
`Init` is always imported by default, so there is no reason to import it explicitly. This PR lints against that.
There is still reason to `import all` something from `Init` to get access to the private scope, so that is allowed by the linter. It is also possible to avoid importing things from `Init` by writing `prelude`, but at that point you cannot also have this linter imported, so this is not a relavant scenario.
This is a follow up to #40401, which removed all imports of `Init`.
---
<!-- Your PR title will become the first line of the commit message.
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- [x] depends on: #40347
[](https://gitpod.io/from-referrer/)
|
t-linter
maintainer-merge
|
8/6 |
Mathlib/Data/Fin/Init.lean,Mathlib/Tactic/Linter/Header.lean |
2 |
15 |
['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
grunweg assignee:grunweg |
9-57217 9 days ago |
11-44756 11 days ago |
11-47519 11 days |
| 42647 |
martinwintermath author:martinwintermath |
feat(Geometry/Convex): add polytopes |
This PR adds the predicate `IsPolytope` for a subset of a `ConvexSpace`.
This is the first PR in a series of PRs implementing polytope theory.
---
<!-- Your PR title will become the first line of the commit message.
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if it passes the continuous integration checks.
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When merging, all the commits will be squashed into a single commit
listing all co-authors.
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Moves:
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[](https://gitpod.io/from-referrer/)
|
t-convex-geometry
maintainer-merge
|
113/0 |
Mathlib.lean,Mathlib/Geometry/Convex/Polytope/Basic.lean |
2 |
23 |
['Parcly-Taxel', 'YaelDillies', 'github-actions', 'grunweg', 'martinwintermath', 'vihdzp'] |
nobody |
7-37616 7 days ago |
9-70457 9 days ago |
29-71395 29 days |
| 39307 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype |
Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745.
|
t-combinatorics
maintainer-merge
|
28/24 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
28 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
6-71393 6 days ago |
58-58226 58 days ago |
112-78461 112 days |
| 42244 |
marcelolynch author:marcelolynch |
perf(LinearAlgebra/TensorProduct/Tower): remove unused P' instance binders |
The Semiring section of this file declares `[Module B P']`, `[IsScalarTower R B P']`, and `[SMulCommClass A B P']`. The three declarations that use `P'` (`map_comp`, `rTensor_comp`, `congr_trans`) need only the `R`/`A`-side instances. No other declaration mentions `P'`. The unused binders are candidates in every `IsScalarTower` and `SMulCommClass` search in the section.
This PR removes the three unused instance binders. No signature changes: a full dump of the module's constant types is identical before and after. Standalone elaboration of the file goes from 5.47 s to 5.15 s (medians of 6 interleaved runs, −6 %).
Same mechanism as #42214 and #42238.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-algebra
maintainer-merge
label:t-algebra$ |
2/2 |
Mathlib/LinearAlgebra/TensorProduct/Tower.lean |
1 |
4 |
['github-actions', 'leanprover-radar', 'marcelolynch', 'themathqueen'] |
nobody |
6-66832 6 days ago |
33-14990 33 days ago |
33-14929 33 days |
| 41081 |
JX-Mo author:JX-Mo |
feat(RepresentationTheory): add Subrepresentation.toRepresentation_apply and Subrepresentation.quotient |
Add a lemma for `Subrepresentation` recording the inherited group action. Help avoid unfolding `Subrepresentation.toRepresentation` when analyzing the action.
Add the `quotient` representation associated to a `Subrepresentation`. It wraps up `Representation.quotient` and `Representation.Subrepresentation` and then we also record the inherited group action.
|
t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
26/0 |
Mathlib/RepresentationTheory/Subrepresentation.lean |
1 |
22 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'jcommelin'] |
joelriou assignee:joelriou |
6-55803 6 days ago |
6-57357 6 days ago |
79-60752 79 days |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): make `PFun` a one-field structure |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
- Redefine `PFun` as a structure with one field, `toFun : α → Part β`.
- Add the `FunLike (α →. β) α (Part β)` instance and configure `simps` projections.
- Add the projection and application simp lemmas required by the structure wrapper.
- Add `fun x ↦. ...` notation for partial-function literals.
- Adapt downstream equality proofs to use `PFun.ext` or `DFunLike.ext` where
`funext` no longer applies directly.
- Remove 33 local `backward.isDefEq.respectTransparency false` workarounds that
are no longer needed after the refactor.
### Downstream impact
The refactor mainly impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). Since `PFun` is no longer definitionally equal to `α → Part β`, tactics such as `rfl`, `simp`, and `funext` can no longer always see through the old raw-function representation.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. |
new-contributor
t-computability
tech debt
LLM-generated
maintainer-merge
|
599/544 |
Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean |
13 |
78 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
6-40388 6 days ago |
6-78537 6 days ago |
110-13601 110 days |
| 26479 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles |
In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome.
---
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|
new-contributor
t-analysis
sphere-packing
maintainer-merge
|
186/0 |
Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean |
2 |
49 |
['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'themathqueen', 'wwylele'] |
j-loreaux assignee:j-loreaux |
5-57373 5 days ago |
10-28794 10 days ago |
111-39262 111 days |
| 43613 |
YaelDillies author:YaelDillies |
feat(Tactic/Positivity): cover `Finset.sum_pos'` with the `Finset.sum` extension |
To prove `0 < ∑ a ∈ s, f a`, the `positivity` extension now also searches through assumptions of the form `a ∈ s` and for each of them tries to prove `0 < f a`.
Will be used in convexity theory.
Generated by Claude Opus
Assisted-by: Claude Opus 5
---
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any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
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-->
[](https://gitpod.io/from-referrer/)
|
t-meta
LLM-generated
maintainer-merge
|
59/13 |
Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Util/Qq.lean |
2 |
9 |
['YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
4-51881 4 days ago |
4-57667 4 days ago |
4-64506 4 days |
| 43190 |
lua-vr author:lua-vr |
chore(MeasureTheory): break import cycle between `QuasiMeasurePreserving` and `AEMeasurable` |
Moves `QuasiMeasurePreserving.restrict` and `AEMeasurable.comp_quasiMeasurePreserving` to the `QuasiMeasurePreserving.lean` file, making it possible to import the `AEMeasurable.lean` file from it.
---
We would need this for #43191 to weaken `QuasiMeasurePreserving` from assuming `Measurable f` to `AEMeasurable`.
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/MeasureTheory.3A.20Various.20refactors/with/620111393
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
maintainer-merge
|
32/20 |
Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/AEStronglyMeasurable.lean,Mathlib/MeasureTheory/Measure/AEMeasurable.lean,Mathlib/MeasureTheory/Measure/QuasiMeasurePreserving.lean,Mathlib/MeasureTheory/Measure/Restrict.lean |
5 |
4 |
['Ruben-VandeVelde', 'felixpernegger', 'github-actions', 'lua-vr'] |
EtienneC30 assignee:EtienneC30 |
4-46956 4 days ago |
8-41873 8 days ago |
8-41812 8 days |
| 43458 |
ajirving author:ajirving |
feat(MeasureTheory/Integral/CircleAverage): add norm_circleAverage_le_circleAverage_norm |
Adds norm_circleAverage_le_circleAverage_norm which is more general than the existing result for abs. Uses the new norm result to simplify the proof for abs.
---
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[](https://gitpod.io/from-referrer/) |
t-measure-probability
easy
maintainer-merge
|
8/3 |
Mathlib/MeasureTheory/Integral/CircleAverage.lean |
1 |
4 |
['JX-Mo', 'Ruben-VandeVelde', 'ajirving', 'github-actions'] |
nobody |
4-46900 4 days ago |
9-456 9 days ago |
9-395 9 days |
| 41505 |
homeowmorphism author:homeowmorphism |
feat(Algebra/Order): define left-orderable monoids and left-orderable groups |
A monoid `M` is *left-orderable* if it admits a linear order invariant under left multiplication
(`a ≤ b → c * a ≤ c * b`), *right-orderable* if it admits one invariant under right multiplication,
and *bi-orderable* if a single order is invariant under both — stronger than being both left- and
right-orderable, since those may need different orders. Moreover, these order becomes strict if the monoid is cancellative. This file defines the `Prop`-valued classes
`IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable`, and the instances producing them from a
compatible `LinearOrder`. Their richer theory over a *group*, where the two one-sided notions
coincide, is developed in `Mathlib/GroupTheory/Orderable.lean`.
Building on the monoid-level classes `IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable` (see
`Mathlib/Algebra/Order/Monoid/Orderable.lean`), adds the theory specific to a group `G`,
where inverses make the left- and right-handed notions coincide.
Co-authored by: Yaël Dillies <yael.dillies@gmail.com>
---
Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Dynamical.20realization.20of.20left-orderable.20groups.20project/
Authored using Claude Fable during the Fermat’s Last Theorem workshop in July 2026.
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[](https://gitpod.io/from-referrer/)
|
LLM-generated
t-group-theory
maintainer-merge
|
473/1 |
Mathlib.lean,Mathlib/Algebra/Order/Group/Opposite.lean,Mathlib/Algebra/Order/Group/PiLex.lean,Mathlib/Algebra/Order/Monoid/Orderable/Defs.lean,Mathlib/Algebra/Order/Monoid/Orderable/Pi.lean,Mathlib/Algebra/Order/Monoid/Orderable/Prod.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Tactic/Translate/ToAdditive.lean |
8 |
105 |
['JovanGerb', 'YaelDillies', 'github-actions', 'homeowmorphism', 'tb65536'] |
nobody |
2-80564 2 days ago |
10-29789 10 days ago |
21-32359 21 days |
| 43480 |
LLaurance author:LLaurance |
feat(Geometry/Euclidean): affine span of orthocenter and vertex is altitude |
Special case of `Affine.Triangle.affineSpan_orthocenter_point_le_altitude`. There is probably a better way than invoking `Affine.Simplex.affineSpan_pair_altitudeFoot_eq_altitude` twice but this seems easiest at the moment.
---
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[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry
maintainer-merge
|
8/0 |
Mathlib/Geometry/Euclidean/MongePoint.lean |
1 |
4 |
['LLaurance', 'github-actions', 'jsm28', 'wwylele'] |
jsm28 assignee:jsm28 |
2-72148 2 days ago |
8-14170 8 days ago |
8-14109 8 days |
| 43254 |
vasnesterov author:vasnesterov |
feat(Tactic): general tactic to translate `(E)NNReal`, `ENat`, `PNat` goals to `Real` and `Nat` |
Introduce the basify tactic, which translates goals about types with extended or truncated arithmetic (`PNat`, `ENat`, `NNReal`, `ENNReal`) into equivalent goals about the underlying type (`Nat`, `Real`), where automation works better.
The tactic is extensible:
* `@[basify_elim]` adds support for a new type;
* `@[basify_op]` adds support for a new operation;
* `@[basify_simp]` adds rewrite lemmas for clearing the degenerate branches
It subsumes `pnat_to_nat` and `enat_to_nat` (#43422).
---
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PR structure:
* `Tactic/Basify.lean` contains the implementation of the tactic
* `Tactic/Basify/Attr.lean` registers attributes
* `MathlibTest/Basify.lean` -- tests
* Other changes are purely tagging lemmas with new attributes
In future PRs we will add `basify [h1, h2, ...]` syntax to pass extra facts that help translation (finiteness, nonzeroness).
[](https://gitpod.io/from-referrer/)
|
t-meta
large-import
maintainer-merge
|
838/74 |
Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Defs.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Basic/ENNReal/Basic.lean,Mathlib/Basic/ENNReal/Inv.lean,Mathlib/Basic/ENNReal/Operations.lean,Mathlib/Basic/NNReal/Defs.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/ENat/Monoid.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/PNat/Defs.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basify.lean,Mathlib/Tactic/Basify/Attr.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,MathlibTest/Tactic/Basify.lean |
22 |
19 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'lua-vr', 'mathlib-bors', 'vasnesterov'] |
joneugster assignee:joneugster |
2-68582 2 days ago |
4-74331 4 days ago |
5-73539 5 days |
| 43402 |
thomaskwaring author:thomaskwaring |
feat(Order/CompactlyGenerated/Basic): atoms are compact in a frame |
... and therefore an atomistic frame is compactly generated. This allows to synthesise `IsCompactlyGenerated (Set α)`. Along the way we generalise a handful of results from `CompleteLattice` to `SemilatticeSup`.
---
[](https://gitpod.io/from-referrer/)
|
t-order
maintainer-merge
|
64/49 |
Mathlib/Order/CompactlyGenerated/Basic.lean |
1 |
24 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'thomaskwaring'] |
nobody |
2-68439 2 days ago |
3-57110 3 days ago |
8-82761 8 days |
| 41717 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Walk): more `transfer` API |
---
The Hamiltonian lemmas don't really need `Finite`; I'll fix this after #41435 (in whichever merges second).
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
tech debt
maintainer-merge
|
54/23 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean |
4 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-67790 2 days ago |
62-12157 62 days ago |
62-12199 62 days |
| 43425 |
Julian-Kuelshammer author:Julian-Kuelshammer |
feat(Data/Fintype/Defs): add DecidableLE (∀ a, β a) |
This PR grew out of the project to define the Tamari lattice in https://github.com/Julian-Kuelshammer/ExtensionClosedSubcategoriesOfAn/blob/main/ExtensionClosedSubcategoriesOfAn/BracketingFunctions.lean
Prepared with the help of Claude. For this specific instance, I asked what was needed to make defining the Tamari lattice in the project above work. It then suggested an instance just for functions (Fin n -> Fin n). After the discussion it suggested the instance above but with an assumption of Preorder instead of LE, so I changed that. I then found a (hopefully) suitable file to put it in and changed the variable names to the surrouning ones.
---
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[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
maintainer-merge
|
4/0 |
Mathlib/Data/Fintype/Defs.lean |
1 |
9 |
['Julian-Kuelshammer', 'github-actions', 'leanprover-radar', 'robin-carlier'] |
nobody |
2-67734 2 days ago |
2-67763 2 days ago |
9-69279 9 days |
| 41830 |
Jun2M author:Jun2M |
feat(Data/PFun): add lemmas for ran, restrict, map, image and preimage |
Add missing simp / API lemmas for partial functions, and strengthen `preimage_inter`
from a subset inclusion to an equality. Also tag a few `Part` uniqueness lemmas
for `grind`.
- `Part`: `grind` attributes on `get_mem`, `mem_unique`, `mem_right_unique`
- `ran`: `ran_coe`, `ran_eq_empty_iff_dom_eq_empty`
- `restrict`: `dom_restrict`, `restrict_restrict`, `ran_restrict`, `preimage_restrict`
- `map`: `dom_map`, `mem_map`, `ran_map`, `image_map`, `preimage_map`
- `image` / `preimage`: `image_subset_ran`, `preimage_empty`,
`disjoint_preimage_of_disjoint`, plus `simp`/`gcongr` attributes
---
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[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
86/3 |
Mathlib/Data/PFun.lean,Mathlib/Data/Part.lean |
2 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-67627 2 days ago |
59-46438 59 days ago |
59-46377 59 days |
| 42354 |
sankalpsthakur author:sankalpsthakur |
doc(Data/Rel): clarify the SetRel representation |
Rewrites the implementation-notes section explaining why `SetRel` represents relations as `Set (α × β)` rather than `α → β → Prop`. The previous text framed the two representations as competing, with the function form as default and `SetRel` mainly justified by dedicated notation. This reframes it around what each representation is *for*: the function form when a relation is primarily applied to arguments, the set-of-pairs form when the relation itself is manipulated as an object — with concrete examples (inverse as preimage, transport as image, union/intersection/complement/subset-order inherited from `Set`). Also fixes a stray double space.
Motivated by #39397.
### Validation
Documentation-only change (module docstring); no executable code touched.
Closes #39397
### AI/LLM disclosure
AI coding tools were used to help draft this change and PR description. I reviewed the complete change and the reasoning before submitting. |
t-data
new-contributor
LLM-generated
documentation
maintainer-merge
|
16/13 |
Mathlib/Basic/Rel.lean |
1 |
9 |
['OrfeasLitos', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'sankalpsthakur'] |
joneugster assignee:joneugster |
2-63707 2 days ago |
8-44819 8 days ago |
41-72850 41 days |
| 33434 |
astrainfinita author:astrainfinita |
chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` |
---
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|
t-data
maintainer-merge
|
6/17 |
Mathlib/Data/Finsupp/Indicator.lean |
1 |
4 |
['github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
2-62509 2 days ago |
19-5301 19 days ago |
38-59533 38 days |
| 37865 |
Jun2M author:Jun2M |
feat(Combinatorics/Graph): edge cut of `Graph` |
This PR introduces
- `edgeCut`: A function on set of vertices that returns the set of edges with exactly one end in the set.
- `IsEdgeCut`: A predicate for set of edges that promises it is `edgeCut` of some set.
- `IsBridge`: An edge `e` is a bridge iff it is a singleton edge cut.
- `IsBond`: An edge Set `B` is bond iff it is minimal nonempty edge cut.
---
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- [x] depends on: #35879
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
215/0 |
Mathlib.lean,Mathlib/Combinatorics/Graph/Connected/EdgeCut.lean,Mathlib/Combinatorics/Graph/Subgraph.lean,docs/references.bib |
4 |
32 |
['Jun2M', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
2-61922 2 days ago |
2-62403 2 days ago |
123-44302 123 days |
| 42024 |
NoneMore author:NoneMore |
feat(Data/Set/Card): characterize finite lower bounds on encard |
A set has the cardinality at least `n` if and only if it has a sequence of length `n` with distinct elements.
---
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AI disclosure: The proof was structurally simplified following the `/lean4:golf` workflow from Lean 4 Skills.
[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
16/0 |
Mathlib/Data/Set/Card.lean |
1 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-60514 2 days ago |
52-77920 52 days ago |
52-77859 52 days |
| 43638 |
hawkrobe author:hawkrobe |
chore(RingTheory/HopfAlgebra): remove left-over `noncomputable`s |
I don't think anything in `ofConvInverse` and `ofAlgHom` is noncomputable so this isn't necessary anymore. (Similar to #41041.) |
t-ring-theory
easy
maintainer-merge
|
2/2 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean |
1 |
7 |
['github-actions', 'hawkrobe', 'leanprover-radar', 'themathqueen'] |
nobody |
2-58232 2 days ago |
2-78012 2 days ago |
2-82241 2 days |
| 42779 |
j-loreaux author:j-loreaux |
feat: geometric series in `WithLp 1 (Unitization 𝕜 A)` are summable if they are in `A` |
This can be used to eliminate the need for `NormOneClass` assumptions related to the spectrum in Banach algebras, and to generalize them from `CompleteSpace` to `HasSummableGeometricSeries`.
---
- [ ] depends on: #43141
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[](https://gitpod.io/from-referrer/)
|
t-analysis
maintainer-merge
|
29/9 |
Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean |
3 |
18 |
['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] |
nobody |
2-56042 2 days ago |
2-65472 2 days ago |
12-49784 12 days |
| 43032 |
SnirBroshi author:SnirBroshi |
chore(Order/Fin/Basic): add missing simp lemmas for coercing order embeddings into functions |
---
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[](https://gitpod.io/from-referrer/)
|
t-order
maintainer-merge
|
24/1 |
Mathlib/Order/Fin/Basic.lean |
1 |
2 |
['github-actions', 'themathqueen'] |
nobody |
2-51050 2 days ago |
23-25627 23 days ago |
23-28332 23 days |
| 43724 |
TJHeeringa author:TJHeeringa |
chore: rename (anti)lipschitz to (anti)lipschitzWith |
This PR renames
- `SemilinearIsometryClass.lipschitz` -> `SemilinearIsometryClass.lipschitzWith`
- `SemilinearIsometryClass.antilipschitz` -> `SemilinearIsometryClass.antilipschitzWith`
- `LinearIsometry.lipschitz` -> `LinearIsometry.lipschitzWith`
- `LinearIsometry.antilipschitz` -> `LinearIsometry.antilipschitzWith`
- `LinearIsometryEquiv.lipschitz` -> `LinearIsometryEquiv.lipschitzWith`
- `Dilation.lipschitz` -> `Dilation.lipschitzWith`
- `Dilation.antilipschitz` -> `Dilation.antilipschitzWith`
---
Part of #42869.
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
51/21 |
Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/Topology/MetricSpace/Dilation.lean,Mathlib/Topology/MetricSpace/Isometry.lean |
5 |
4 |
['TJHeeringa', 'github-actions', 'themathqueen'] |
nobody |
2-46866 2 days ago |
2-51459 2 days ago |
2-51398 2 days |
| 43459 |
vlad902 author:vlad902 |
feat(AffineIndependent): add `AffineIndepOn` |
`LinearIndepOn` is a set-valued analog of `LinearIndependent`. `AffineIndepOn` is similarly a set-valued analog of `AffineIndependent` that makes it easier to reason about operations like insertion/deletion occurring over sets. The first half of the change is mostly copied from `LinearIndepOn`.
Created as part of the "Polyhedra in Lean" workshop in Berlin.
---
AI disclosure: Claude helped find some lemmas I had forgotten to copy over, and then I used it to generate a few proofs (relating AffineIndepOn/LinearIndepOn and for `insert`) that I then golfed/edited.
There should also be an `AffineIndepOn`-version of `exists_affineIndependent`, but I have another change I also have scheduled for this lemma so I want to do this in a follow-up since this PR is large-enough as-is.
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[](https://gitpod.io/from-referrer/)
|
t-algebra
LLM-generated
maintainer-merge
label:t-algebra$ |
240/22 |
Mathlib/Data/Fin/VecNotation.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean,Mathlib/LinearAlgebra/Matrix/Notation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean |
5 |
10 |
['YaelDillies', 'github-actions', 'vlad902'] |
nobody |
2-39772 2 days ago |
6-72602 6 days ago |
6-76149 6 days |
| 42165 |
bocowgill author:bocowgill |
feat(Probability/HasCondDistrib): characterize independence using conditional distributions |
This PR uses conditional distributions to characterize independence of two random variables.
It adds eight public declarations to `Mathlib/Probability/HasCondDistrib.lean`, which is the only file modified:
- `indepFun_iff_hasCondDistrib_const_of_hasLaw`: characterizes independence using a constant conditional-distribution kernel when the laws are specified.
- `indepFun_iff_hasCondDistrib_const`: specializes this characterization to the marginal laws `P.map X` and `P.map Y`.
- `IndepFun.hasCondDistrib_const`: the forward implication of the preceding equivalence.
- `HasCondDistrib.indepFun_of_const`: the reverse implication.
- `hasCondDistrib_condDistrib`: shows that the regular conditional distribution `condDistrib Y X P` satisfies `HasCondDistrib`.
- `hasCondDistrib_iff_condDistrib_ae_eq`: characterizes finite kernels satisfying `HasCondDistrib` by almost-everywhere equality with `condDistrib`.
- `indepFun_iff_condDistrib_ae_eq_const_of_hasLaw`: characterizes independence by almost-everywhere equality of `condDistrib` with the constant kernel at the specified law.
- `indepFun_iff_condDistrib_ae_eq_const`: specializes this characterization to the marginal laws.
The PR adds no new file and makes no change to the root `Mathlib.lean` imports.
---
### Motivation
These results provide a basic building block for formalizing randomized experiments and causal identification. The main result provides a starting point for later ignorability and conditional-independence results in causal inference.
### LLM disclosure
For theorem planning and Lean implementation, I substantially used Codex by OpenAI. I also used it for suggestions around naming and documentation, for iterating on the proofs, and for validating my commits locally.
I manually searched for the best locations and earlier results to build upon. I personally reviewed both the mathematical statements and Lean code (line-by-line), as well as the suggestions around naming and API choices. I also reviewed and confirmed that I can explain each step of the results (both Mathematics and Lean syntax).
To validate the change, I directly compiled the modified file and ran a targeted build. I also ran the style linter, and completed a full `lake build` and a full `lake test`.
Please note: This is one of my first mathlib contributions. I welcome corrections or suggestions about all aspects of this PR. I'm prepared to revise it as necessary, and to learn from the review.
|
t-measure-probability
LLM-generated
new-contributor
maintainer-merge
|
68/3 |
Mathlib/Probability/HasCondDistrib.lean |
1 |
33 |
['CoolRmal', 'EtienneC30', 'bocowgill', 'github-actions', 'leanprover-radar'] |
nobody |
2-32282 2 days ago |
25-17107 25 days ago |
48-8938 48 days |
| 41737 |
jjdishere author:jjdishere |
feat(CategoryTheory/AB5): AB5 instance of Ab with universe variables |
When u <= v <= w, we show `AB5OfSize.{u, v} Ab.{w}`.
(Only `AB5OfSize.{u, u + 1} Ab.{u + 1}` is need in my further application.)
Co-authored-by: @chrisflav
---
<!-- Your PR title will become the first line of the commit message.
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any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
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-->
[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
13/1 |
Mathlib/Algebra/Category/Grp/AB.lean |
1 |
5 |
['github-actions', 'leanprover-radar', 'robin-carlier'] |
ocfnash assignee:ocfnash |
1-85045 1 day ago |
61-62153 61 days ago |
61-62092 61 days |
| 40857 |
BryceT233 author:BryceT233 |
feat(RingTheory/Radical): radical of principal ideals in a UFD |
This PR resolves the "TODO" in `RingTheory/Radical/Basic.lean` by connecting `UniqueFactorizationMonoid.radical` with `Ideal.radical`.
---
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t-ring-theory
maintainer-merge
|
26/8 |
Mathlib/NumberTheory/NumberField/Ideal/KummerDedekind.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/Radical/Basic.lean |
3 |
17 |
['BryceT233', 'github-actions', 'tb65536'] |
mattrobball assignee:mattrobball |
1-72661 1 day ago |
4-14311 4 days ago |
80-18797 80 days |
| 42818 |
TJHeeringa author:TJHeeringa |
chore(Algebra/Module/Equiv): split Equiv into Basic, Pi, Prod and Submodule |
The existing file `Equiv` has become too large. This splits the file into `Basic`, `Pi`, `Prod` and `Submodule`.
---
Copyrights were adapted based on what was done in #42697. I didn't find out who wrote `piCongrRight`, only that Kevin wrote `piCongrLeft`.
The companion PR marking `Mathlib/Topology/Algebra/Module/Equiv.lean` as deprected is #42818.
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|
file-removed
t-topology
maintainer-merge
|
499/416 |
Mathlib.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Convex/ContinuousLinearEquiv.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Operator/ContinuousLinearMap.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Normed/Operator/Prod.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/RepresentationTheory/Continuous/Basic.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean,Mathlib/Topology/Algebra/Module/Complement.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Invertible.lean,Mathlib/Topology/Algebra/Module/Determinant.lean,Mathlib/Topology/Algebra/Module/Equiv/Basic.lean,Mathlib/Topology/Algebra/Module/Equiv/Pi.lean,Mathlib/Topology/Algebra/Module/Equiv/Prod.lean,Mathlib/Topology/Algebra/Module/Equiv/Submodule.lean,Mathlib/Topology/Algebra/Module/IsWeak.lean,Mathlib/Topology/Algebra/Module/LinearPMap.lean,Mathlib/Topology/Algebra/Module/ModuleTopology.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Module/TransferInstance.lean,Mathlib/Topology/Instances/RealVectorSpace.lean,Mathlib/Topology/Maps/Strict/Module.lean |
36 |
29 |
['TJHeeringa', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
1-57153 1 day ago |
2-47091 2 days ago |
24-43052 24 days |
| 43250 |
WenrongZou author:WenrongZou |
chore(Valuation/Integers): delete a TODO in `Valuation.Integers` |
I think [`Valuation.Integers`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/Integers.html#Valuation.Integers) is the characteristic predicate. If this is not what we want, I am happy to add a characteristic predicate in this file.
---
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|
t-ring-theory
easy
maintainer-merge
|
0/1 |
Mathlib/RingTheory/Valuation/Integers.lean |
1 |
3 |
['b-mehta', 'github-actions'] |
nobody |
1-18927 1 day ago |
14-17883 14 days ago |
14-17822 14 days |
| 39905 |
plp127 author:plp127 |
chore(Order/CompleteBooleanAlgebra): dualize `symmDiff` theorems |
Dualize some `symmDiff` theorems, and also generalize them from `CompleteBooleanAlgebra` to `Order.Coframe`.
---
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|
t-order
maintainer-merge
awaiting-author
|
62/39 |
Mathlib/Order/CompleteBooleanAlgebra.lean,Mathlib/Order/SymmDiff.lean |
2 |
6 |
['JovanGerb', 'YaelDillies', 'github-actions', 'plp127', 'vihdzp'] |
nobody |
1-3958 1 day ago |
1-3958 1 day ago |
102-61922 102 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
awaiting-author
|
205/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
67 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'jcommelin', 'mathlib-dependent-issues', 'vlad902', 'wwylele'] |
nobody |
12-84869 12 days ago |
12-84869 12 days ago |
146-39214 146 days |
| 41983 |
marcelolynch author:marcelolynch |
fix(cache): avoid misleading message on refs not built "on purpose" |
`cache get` on a fork printed a "no cache found for HEAD" note whenever the per-SHA fork marker was absent, even when every file was then served from mathlib's master cache — which is always the case for a tooling-only PR (its CI build stages zero files, so the upload job and the marker are skipped by design). Reported in https://github.com/leanprover-community/mathlib4/pull/41707#discussion_r3602459565.
The note is now printed after the download rounds and only when files are actually missing; `cache query`'s no-result message names both possible causes (CI hasn't built the commits, or its builds had nothing fork-specific to upload) instead of claiming the first.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
CI
LLM-generated
maintainer-merge
|
203/87 |
Cache/Main.lean,Cache/Query.lean,Cache/Requests.lean,Cache/Test.lean,Cache/Warning.lean |
5 |
4 |
['Vierkantor', 'github-actions', 'joneugster', 'marcelolynch'] |
nobody |
11-48705 11 days ago |
47-48063 47 days ago |
47-48002 47 days |
| 41938 |
rosborn author:rosborn |
chore(Linter/DirectoryDependency): move forbidden directories into a JSON file |
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>
---
This PR adopts the work from #26088 and #26406.
The JSON file was generated programmatically from the previous hard-coded array and verified to produce an identical relation, with one deliberate exception: the entry ``(`MathlibTest.Header, `Mathlib.Deprecated)`` was dropped.
If this looks good, I can continue work on `allowedImportDirs` and `overrideAllowedImportDirs`.
<!-- Your PR title will become the first line of the commit message.
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|
t-linter
maintainer-merge
merge-conflict
awaiting-author
|
408/318 |
Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json |
3 |
19 |
['github-actions', 'grunweg', 'jcommelin', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'rosborn'] |
grunweg assignee:grunweg |
9-78013 9 days ago |
16-76621 16 days ago |
33-83850 33 days |
| 43203 |
SnirBroshi author:SnirBroshi |
fix(Tactic/FastInstance): telescope over instance families |
Fix `fast_instance%` to support for instance families (e.g. `Π i, Group (G i)` and `DecidableEq α`) (regression since #36420), both for the top-level instance and nested instances.
---
The `forallTelescopeReducing` only telescoped the `expectedType` but not `inst`; we have to `mkAppN` and give it the telescope metavariables.
Also moved the `forallTelescopeReducing` call to inside the function to restore support for nested instance families as well.
Added a bunch of tests, and also tweaked the docstring of `inferInstanceAs%` since it was inaccurate after Lean shipped a new `inferInstanceAs` elaborator (which wraps instances in auxiliary semireducible defs).
[#mathlib4 > fast_instance% recursion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/fast_instance.25.20recursion/with/619696862)
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[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
|
139/7 |
Mathlib/Tactic/FastInstance.lean,MathlibTest/FastInstance.lean |
2 |
16 |
['JovanGerb', 'SnirBroshi', 'Vierkantor', 'github-actions'] |
nobody |
9-63583 9 days ago |
12-67553 12 days ago |
15-65108 15 days |
| 38228 |
kim-em author:kim-em |
ci: block merging PRs that increase technical debt unless reviewed |
This PR adds a merge gate for technical debt increases.
When the existing technical debt metrics script reports an increase, the `build` job adds an `increases-technical-debt` label. A `check-technical-debt` job then adds `blocked-by-increases-technical-debt`, which blocks bors.
A reviewer can add `allow-increases-technical-debt` to unblock after confirming the increase is acceptable.
### Fail-closed detection
The detection greps for the *safe* patterns (`Decrease in tech debt:` / `No changes to technical debt.`) rather than for `Increase`. If `mathlib-ci` changes the script's output wording, the label is added (fail closed) rather than silently skipped (fail open).
### Labels (three-label pattern, same as #38225)
| Label | Managed by | Purpose |
|---|---|---|
| `increases-technical-debt` | `build` job (tech debt script) | Factual: this PR increases debt |
| `blocked-by-increases-technical-debt` | `check-technical-debt` job | Operational: blocks bors |
| `allow-increases-technical-debt` | Reviewer | Override: reviewer approves the increase |
Bors's `block_labels` has no conditional logic, so we need the derived `blocked-by-increases-technical-debt` label to express the conjunction "increases-technical-debt AND NOT allow-increases-technical-debt".
False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/increases-technical-debt.20label).
🤖 Prepared with Claude Code
-----------
- [x] depends on: leanprover-community/mathlib-ci#28 |
CI
LLM-generated
maintainer-merge
|
92/2 |
.github/workflows/PR_summary.yml,bors.toml |
2 |
16 |
['felixpernegger', 'github-actions', 'grunweg', 'jcommelin', 'joneugster', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
9-60392 9 days ago |
18-9951 18 days ago |
67-35520 67 days |
| 40412 |
JovanGerb author:JovanGerb |
feat(Linter/Header): lint against imports from `Init` |
`Init` is always imported by default, so there is no reason to import it explicitly. This PR lints against that.
There is still reason to `import all` something from `Init` to get access to the private scope, so that is allowed by the linter. It is also possible to avoid importing things from `Init` by writing `prelude`, but at that point you cannot also have this linter imported, so this is not a relavant scenario.
This is a follow up to #40401, which removed all imports of `Init`.
---
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- [x] depends on: #40347
[](https://gitpod.io/from-referrer/)
|
t-linter
maintainer-merge
|
8/6 |
Mathlib/Data/Fin/Init.lean,Mathlib/Tactic/Linter/Header.lean |
2 |
15 |
['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
grunweg assignee:grunweg |
9-57217 9 days ago |
11-44756 11 days ago |
11-47519 11 days |
| 42647 |
martinwintermath author:martinwintermath |
feat(Geometry/Convex): add polytopes |
This PR adds the predicate `IsPolytope` for a subset of a `ConvexSpace`.
This is the first PR in a series of PRs implementing polytope theory.
---
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|
t-convex-geometry
maintainer-merge
|
113/0 |
Mathlib.lean,Mathlib/Geometry/Convex/Polytope/Basic.lean |
2 |
23 |
['Parcly-Taxel', 'YaelDillies', 'github-actions', 'grunweg', 'martinwintermath', 'vihdzp'] |
nobody |
7-37616 7 days ago |
9-70457 9 days ago |
29-71395 29 days |
| 39307 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype |
Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745.
|
t-combinatorics
maintainer-merge
|
28/24 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
28 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
6-71393 6 days ago |
58-58226 58 days ago |
112-78461 112 days |
| 42244 |
marcelolynch author:marcelolynch |
perf(LinearAlgebra/TensorProduct/Tower): remove unused P' instance binders |
The Semiring section of this file declares `[Module B P']`, `[IsScalarTower R B P']`, and `[SMulCommClass A B P']`. The three declarations that use `P'` (`map_comp`, `rTensor_comp`, `congr_trans`) need only the `R`/`A`-side instances. No other declaration mentions `P'`. The unused binders are candidates in every `IsScalarTower` and `SMulCommClass` search in the section.
This PR removes the three unused instance binders. No signature changes: a full dump of the module's constant types is identical before and after. Standalone elaboration of the file goes from 5.47 s to 5.15 s (medians of 6 interleaved runs, −6 %).
Same mechanism as #42214 and #42238.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-algebra
maintainer-merge
label:t-algebra$ |
2/2 |
Mathlib/LinearAlgebra/TensorProduct/Tower.lean |
1 |
4 |
['github-actions', 'leanprover-radar', 'marcelolynch', 'themathqueen'] |
nobody |
6-66832 6 days ago |
33-14990 33 days ago |
33-14929 33 days |
| 41081 |
JX-Mo author:JX-Mo |
feat(RepresentationTheory): add Subrepresentation.toRepresentation_apply and Subrepresentation.quotient |
Add a lemma for `Subrepresentation` recording the inherited group action. Help avoid unfolding `Subrepresentation.toRepresentation` when analyzing the action.
Add the `quotient` representation associated to a `Subrepresentation`. It wraps up `Representation.quotient` and `Representation.Subrepresentation` and then we also record the inherited group action.
|
t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
26/0 |
Mathlib/RepresentationTheory/Subrepresentation.lean |
1 |
22 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'jcommelin'] |
joelriou assignee:joelriou |
6-55803 6 days ago |
6-57357 6 days ago |
79-60752 79 days |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): make `PFun` a one-field structure |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
- Redefine `PFun` as a structure with one field, `toFun : α → Part β`.
- Add the `FunLike (α →. β) α (Part β)` instance and configure `simps` projections.
- Add the projection and application simp lemmas required by the structure wrapper.
- Add `fun x ↦. ...` notation for partial-function literals.
- Adapt downstream equality proofs to use `PFun.ext` or `DFunLike.ext` where
`funext` no longer applies directly.
- Remove 33 local `backward.isDefEq.respectTransparency false` workarounds that
are no longer needed after the refactor.
### Downstream impact
The refactor mainly impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). Since `PFun` is no longer definitionally equal to `α → Part β`, tactics such as `rfl`, `simp`, and `funext` can no longer always see through the old raw-function representation.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. |
new-contributor
t-computability
tech debt
LLM-generated
maintainer-merge
|
599/544 |
Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean |
13 |
78 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
6-40388 6 days ago |
6-78537 6 days ago |
110-13601 110 days |
| 26479 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles |
In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome.
---
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|
new-contributor
t-analysis
sphere-packing
maintainer-merge
|
186/0 |
Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean |
2 |
49 |
['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'themathqueen', 'wwylele'] |
j-loreaux assignee:j-loreaux |
5-57373 5 days ago |
10-28794 10 days ago |
111-39262 111 days |
| 43613 |
YaelDillies author:YaelDillies |
feat(Tactic/Positivity): cover `Finset.sum_pos'` with the `Finset.sum` extension |
To prove `0 < ∑ a ∈ s, f a`, the `positivity` extension now also searches through assumptions of the form `a ∈ s` and for each of them tries to prove `0 < f a`.
Will be used in convexity theory.
Generated by Claude Opus
Assisted-by: Claude Opus 5
---
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t-meta
LLM-generated
maintainer-merge
|
59/13 |
Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Util/Qq.lean |
2 |
9 |
['YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
4-51881 4 days ago |
4-57667 4 days ago |
4-64506 4 days |
| 43190 |
lua-vr author:lua-vr |
chore(MeasureTheory): break import cycle between `QuasiMeasurePreserving` and `AEMeasurable` |
Moves `QuasiMeasurePreserving.restrict` and `AEMeasurable.comp_quasiMeasurePreserving` to the `QuasiMeasurePreserving.lean` file, making it possible to import the `AEMeasurable.lean` file from it.
---
We would need this for #43191 to weaken `QuasiMeasurePreserving` from assuming `Measurable f` to `AEMeasurable`.
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/MeasureTheory.3A.20Various.20refactors/with/620111393
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|
t-measure-probability
maintainer-merge
|
32/20 |
Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/AEStronglyMeasurable.lean,Mathlib/MeasureTheory/Measure/AEMeasurable.lean,Mathlib/MeasureTheory/Measure/QuasiMeasurePreserving.lean,Mathlib/MeasureTheory/Measure/Restrict.lean |
5 |
4 |
['Ruben-VandeVelde', 'felixpernegger', 'github-actions', 'lua-vr'] |
EtienneC30 assignee:EtienneC30 |
4-46956 4 days ago |
8-41873 8 days ago |
8-41812 8 days |
| 43458 |
ajirving author:ajirving |
feat(MeasureTheory/Integral/CircleAverage): add norm_circleAverage_le_circleAverage_norm |
Adds norm_circleAverage_le_circleAverage_norm which is more general than the existing result for abs. Uses the new norm result to simplify the proof for abs.
---
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t-measure-probability
easy
maintainer-merge
|
8/3 |
Mathlib/MeasureTheory/Integral/CircleAverage.lean |
1 |
4 |
['JX-Mo', 'Ruben-VandeVelde', 'ajirving', 'github-actions'] |
nobody |
4-46900 4 days ago |
9-456 9 days ago |
9-395 9 days |
| 41505 |
homeowmorphism author:homeowmorphism |
feat(Algebra/Order): define left-orderable monoids and left-orderable groups |
A monoid `M` is *left-orderable* if it admits a linear order invariant under left multiplication
(`a ≤ b → c * a ≤ c * b`), *right-orderable* if it admits one invariant under right multiplication,
and *bi-orderable* if a single order is invariant under both — stronger than being both left- and
right-orderable, since those may need different orders. Moreover, these order becomes strict if the monoid is cancellative. This file defines the `Prop`-valued classes
`IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable`, and the instances producing them from a
compatible `LinearOrder`. Their richer theory over a *group*, where the two one-sided notions
coincide, is developed in `Mathlib/GroupTheory/Orderable.lean`.
Building on the monoid-level classes `IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable` (see
`Mathlib/Algebra/Order/Monoid/Orderable.lean`), adds the theory specific to a group `G`,
where inverses make the left- and right-handed notions coincide.
Co-authored by: Yaël Dillies <yael.dillies@gmail.com>
---
Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Dynamical.20realization.20of.20left-orderable.20groups.20project/
Authored using Claude Fable during the Fermat’s Last Theorem workshop in July 2026.
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LLM-generated
t-group-theory
maintainer-merge
|
473/1 |
Mathlib.lean,Mathlib/Algebra/Order/Group/Opposite.lean,Mathlib/Algebra/Order/Group/PiLex.lean,Mathlib/Algebra/Order/Monoid/Orderable/Defs.lean,Mathlib/Algebra/Order/Monoid/Orderable/Pi.lean,Mathlib/Algebra/Order/Monoid/Orderable/Prod.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Tactic/Translate/ToAdditive.lean |
8 |
105 |
['JovanGerb', 'YaelDillies', 'github-actions', 'homeowmorphism', 'tb65536'] |
nobody |
2-80564 2 days ago |
10-29789 10 days ago |
21-32359 21 days |
| 43480 |
LLaurance author:LLaurance |
feat(Geometry/Euclidean): affine span of orthocenter and vertex is altitude |
Special case of `Affine.Triangle.affineSpan_orthocenter_point_le_altitude`. There is probably a better way than invoking `Affine.Simplex.affineSpan_pair_altitudeFoot_eq_altitude` twice but this seems easiest at the moment.
---
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t-euclidean-geometry
maintainer-merge
|
8/0 |
Mathlib/Geometry/Euclidean/MongePoint.lean |
1 |
4 |
['LLaurance', 'github-actions', 'jsm28', 'wwylele'] |
jsm28 assignee:jsm28 |
2-72148 2 days ago |
8-14170 8 days ago |
8-14109 8 days |
| 43254 |
vasnesterov author:vasnesterov |
feat(Tactic): general tactic to translate `(E)NNReal`, `ENat`, `PNat` goals to `Real` and `Nat` |
Introduce the basify tactic, which translates goals about types with extended or truncated arithmetic (`PNat`, `ENat`, `NNReal`, `ENNReal`) into equivalent goals about the underlying type (`Nat`, `Real`), where automation works better.
The tactic is extensible:
* `@[basify_elim]` adds support for a new type;
* `@[basify_op]` adds support for a new operation;
* `@[basify_simp]` adds rewrite lemmas for clearing the degenerate branches
It subsumes `pnat_to_nat` and `enat_to_nat` (#43422).
---
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PR structure:
* `Tactic/Basify.lean` contains the implementation of the tactic
* `Tactic/Basify/Attr.lean` registers attributes
* `MathlibTest/Basify.lean` -- tests
* Other changes are purely tagging lemmas with new attributes
In future PRs we will add `basify [h1, h2, ...]` syntax to pass extra facts that help translation (finiteness, nonzeroness).
[](https://gitpod.io/from-referrer/)
|
t-meta
large-import
maintainer-merge
|
838/74 |
Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Defs.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Basic/ENNReal/Basic.lean,Mathlib/Basic/ENNReal/Inv.lean,Mathlib/Basic/ENNReal/Operations.lean,Mathlib/Basic/NNReal/Defs.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/ENat/Monoid.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/PNat/Defs.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basify.lean,Mathlib/Tactic/Basify/Attr.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,MathlibTest/Tactic/Basify.lean |
22 |
19 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'lua-vr', 'mathlib-bors', 'vasnesterov'] |
joneugster assignee:joneugster |
2-68582 2 days ago |
4-74331 4 days ago |
5-73539 5 days |
| 43402 |
thomaskwaring author:thomaskwaring |
feat(Order/CompactlyGenerated/Basic): atoms are compact in a frame |
... and therefore an atomistic frame is compactly generated. This allows to synthesise `IsCompactlyGenerated (Set α)`. Along the way we generalise a handful of results from `CompleteLattice` to `SemilatticeSup`.
---
[](https://gitpod.io/from-referrer/)
|
t-order
maintainer-merge
|
64/49 |
Mathlib/Order/CompactlyGenerated/Basic.lean |
1 |
24 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'thomaskwaring'] |
nobody |
2-68439 2 days ago |
3-57110 3 days ago |
8-82761 8 days |
| 41717 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Walk): more `transfer` API |
---
The Hamiltonian lemmas don't really need `Finite`; I'll fix this after #41435 (in whichever merges second).
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
tech debt
maintainer-merge
|
54/23 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean |
4 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-67790 2 days ago |
62-12157 62 days ago |
62-12199 62 days |
| 43425 |
Julian-Kuelshammer author:Julian-Kuelshammer |
feat(Data/Fintype/Defs): add DecidableLE (∀ a, β a) |
This PR grew out of the project to define the Tamari lattice in https://github.com/Julian-Kuelshammer/ExtensionClosedSubcategoriesOfAn/blob/main/ExtensionClosedSubcategoriesOfAn/BracketingFunctions.lean
Prepared with the help of Claude. For this specific instance, I asked what was needed to make defining the Tamari lattice in the project above work. It then suggested an instance just for functions (Fin n -> Fin n). After the discussion it suggested the instance above but with an assumption of Preorder instead of LE, so I changed that. I then found a (hopefully) suitable file to put it in and changed the variable names to the surrouning ones.
---
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[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
maintainer-merge
|
4/0 |
Mathlib/Data/Fintype/Defs.lean |
1 |
9 |
['Julian-Kuelshammer', 'github-actions', 'leanprover-radar', 'robin-carlier'] |
nobody |
2-67734 2 days ago |
2-67763 2 days ago |
9-69279 9 days |
| 41830 |
Jun2M author:Jun2M |
feat(Data/PFun): add lemmas for ran, restrict, map, image and preimage |
Add missing simp / API lemmas for partial functions, and strengthen `preimage_inter`
from a subset inclusion to an equality. Also tag a few `Part` uniqueness lemmas
for `grind`.
- `Part`: `grind` attributes on `get_mem`, `mem_unique`, `mem_right_unique`
- `ran`: `ran_coe`, `ran_eq_empty_iff_dom_eq_empty`
- `restrict`: `dom_restrict`, `restrict_restrict`, `ran_restrict`, `preimage_restrict`
- `map`: `dom_map`, `mem_map`, `ran_map`, `image_map`, `preimage_map`
- `image` / `preimage`: `image_subset_ran`, `preimage_empty`,
`disjoint_preimage_of_disjoint`, plus `simp`/`gcongr` attributes
---
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[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
86/3 |
Mathlib/Data/PFun.lean,Mathlib/Data/Part.lean |
2 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-67627 2 days ago |
59-46438 59 days ago |
59-46377 59 days |
| 42354 |
sankalpsthakur author:sankalpsthakur |
doc(Data/Rel): clarify the SetRel representation |
Rewrites the implementation-notes section explaining why `SetRel` represents relations as `Set (α × β)` rather than `α → β → Prop`. The previous text framed the two representations as competing, with the function form as default and `SetRel` mainly justified by dedicated notation. This reframes it around what each representation is *for*: the function form when a relation is primarily applied to arguments, the set-of-pairs form when the relation itself is manipulated as an object — with concrete examples (inverse as preimage, transport as image, union/intersection/complement/subset-order inherited from `Set`). Also fixes a stray double space.
Motivated by #39397.
### Validation
Documentation-only change (module docstring); no executable code touched.
Closes #39397
### AI/LLM disclosure
AI coding tools were used to help draft this change and PR description. I reviewed the complete change and the reasoning before submitting. |
t-data
new-contributor
LLM-generated
documentation
maintainer-merge
|
16/13 |
Mathlib/Basic/Rel.lean |
1 |
9 |
['OrfeasLitos', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'sankalpsthakur'] |
joneugster assignee:joneugster |
2-63707 2 days ago |
8-44819 8 days ago |
41-72850 41 days |
| 33434 |
astrainfinita author:astrainfinita |
chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` |
---
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[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
6/17 |
Mathlib/Data/Finsupp/Indicator.lean |
1 |
4 |
['github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
2-62509 2 days ago |
19-5301 19 days ago |
38-59533 38 days |
| 37865 |
Jun2M author:Jun2M |
feat(Combinatorics/Graph): edge cut of `Graph` |
This PR introduces
- `edgeCut`: A function on set of vertices that returns the set of edges with exactly one end in the set.
- `IsEdgeCut`: A predicate for set of edges that promises it is `edgeCut` of some set.
- `IsBridge`: An edge `e` is a bridge iff it is a singleton edge cut.
- `IsBond`: An edge Set `B` is bond iff it is minimal nonempty edge cut.
---
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- [x] depends on: #35879
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
215/0 |
Mathlib.lean,Mathlib/Combinatorics/Graph/Connected/EdgeCut.lean,Mathlib/Combinatorics/Graph/Subgraph.lean,docs/references.bib |
4 |
32 |
['Jun2M', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
2-61922 2 days ago |
2-62403 2 days ago |
123-44302 123 days |
| 42024 |
NoneMore author:NoneMore |
feat(Data/Set/Card): characterize finite lower bounds on encard |
A set has the cardinality at least `n` if and only if it has a sequence of length `n` with distinct elements.
---
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AI disclosure: The proof was structurally simplified following the `/lean4:golf` workflow from Lean 4 Skills.
[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
16/0 |
Mathlib/Data/Set/Card.lean |
1 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-60514 2 days ago |
52-77920 52 days ago |
52-77859 52 days |
| 43638 |
hawkrobe author:hawkrobe |
chore(RingTheory/HopfAlgebra): remove left-over `noncomputable`s |
I don't think anything in `ofConvInverse` and `ofAlgHom` is noncomputable so this isn't necessary anymore. (Similar to #41041.) |
t-ring-theory
easy
maintainer-merge
|
2/2 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean |
1 |
7 |
['github-actions', 'hawkrobe', 'leanprover-radar', 'themathqueen'] |
nobody |
2-58232 2 days ago |
2-78012 2 days ago |
2-82241 2 days |
| 42779 |
j-loreaux author:j-loreaux |
feat: geometric series in `WithLp 1 (Unitization 𝕜 A)` are summable if they are in `A` |
This can be used to eliminate the need for `NormOneClass` assumptions related to the spectrum in Banach algebras, and to generalize them from `CompleteSpace` to `HasSummableGeometricSeries`.
---
- [ ] depends on: #43141
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[](https://gitpod.io/from-referrer/)
|
t-analysis
maintainer-merge
|
29/9 |
Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean |
3 |
18 |
['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] |
nobody |
2-56042 2 days ago |
2-65472 2 days ago |
12-49784 12 days |
| 43032 |
SnirBroshi author:SnirBroshi |
chore(Order/Fin/Basic): add missing simp lemmas for coercing order embeddings into functions |
---
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-order
maintainer-merge
|
24/1 |
Mathlib/Order/Fin/Basic.lean |
1 |
2 |
['github-actions', 'themathqueen'] |
nobody |
2-51050 2 days ago |
23-25627 23 days ago |
23-28332 23 days |
| 43724 |
TJHeeringa author:TJHeeringa |
chore: rename (anti)lipschitz to (anti)lipschitzWith |
This PR renames
- `SemilinearIsometryClass.lipschitz` -> `SemilinearIsometryClass.lipschitzWith`
- `SemilinearIsometryClass.antilipschitz` -> `SemilinearIsometryClass.antilipschitzWith`
- `LinearIsometry.lipschitz` -> `LinearIsometry.lipschitzWith`
- `LinearIsometry.antilipschitz` -> `LinearIsometry.antilipschitzWith`
- `LinearIsometryEquiv.lipschitz` -> `LinearIsometryEquiv.lipschitzWith`
- `Dilation.lipschitz` -> `Dilation.lipschitzWith`
- `Dilation.antilipschitz` -> `Dilation.antilipschitzWith`
---
Part of #42869.
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|
t-topology
maintainer-merge
|
51/21 |
Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/Topology/MetricSpace/Dilation.lean,Mathlib/Topology/MetricSpace/Isometry.lean |
5 |
4 |
['TJHeeringa', 'github-actions', 'themathqueen'] |
nobody |
2-46866 2 days ago |
2-51459 2 days ago |
2-51398 2 days |
| 43459 |
vlad902 author:vlad902 |
feat(AffineIndependent): add `AffineIndepOn` |
`LinearIndepOn` is a set-valued analog of `LinearIndependent`. `AffineIndepOn` is similarly a set-valued analog of `AffineIndependent` that makes it easier to reason about operations like insertion/deletion occurring over sets. The first half of the change is mostly copied from `LinearIndepOn`.
Created as part of the "Polyhedra in Lean" workshop in Berlin.
---
AI disclosure: Claude helped find some lemmas I had forgotten to copy over, and then I used it to generate a few proofs (relating AffineIndepOn/LinearIndepOn and for `insert`) that I then golfed/edited.
There should also be an `AffineIndepOn`-version of `exists_affineIndependent`, but I have another change I also have scheduled for this lemma so I want to do this in a follow-up since this PR is large-enough as-is.
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|
t-algebra
LLM-generated
maintainer-merge
label:t-algebra$ |
240/22 |
Mathlib/Data/Fin/VecNotation.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean,Mathlib/LinearAlgebra/Matrix/Notation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean |
5 |
10 |
['YaelDillies', 'github-actions', 'vlad902'] |
nobody |
2-39772 2 days ago |
6-72602 6 days ago |
6-76149 6 days |
| 42165 |
bocowgill author:bocowgill |
feat(Probability/HasCondDistrib): characterize independence using conditional distributions |
This PR uses conditional distributions to characterize independence of two random variables.
It adds eight public declarations to `Mathlib/Probability/HasCondDistrib.lean`, which is the only file modified:
- `indepFun_iff_hasCondDistrib_const_of_hasLaw`: characterizes independence using a constant conditional-distribution kernel when the laws are specified.
- `indepFun_iff_hasCondDistrib_const`: specializes this characterization to the marginal laws `P.map X` and `P.map Y`.
- `IndepFun.hasCondDistrib_const`: the forward implication of the preceding equivalence.
- `HasCondDistrib.indepFun_of_const`: the reverse implication.
- `hasCondDistrib_condDistrib`: shows that the regular conditional distribution `condDistrib Y X P` satisfies `HasCondDistrib`.
- `hasCondDistrib_iff_condDistrib_ae_eq`: characterizes finite kernels satisfying `HasCondDistrib` by almost-everywhere equality with `condDistrib`.
- `indepFun_iff_condDistrib_ae_eq_const_of_hasLaw`: characterizes independence by almost-everywhere equality of `condDistrib` with the constant kernel at the specified law.
- `indepFun_iff_condDistrib_ae_eq_const`: specializes this characterization to the marginal laws.
The PR adds no new file and makes no change to the root `Mathlib.lean` imports.
---
### Motivation
These results provide a basic building block for formalizing randomized experiments and causal identification. The main result provides a starting point for later ignorability and conditional-independence results in causal inference.
### LLM disclosure
For theorem planning and Lean implementation, I substantially used Codex by OpenAI. I also used it for suggestions around naming and documentation, for iterating on the proofs, and for validating my commits locally.
I manually searched for the best locations and earlier results to build upon. I personally reviewed both the mathematical statements and Lean code (line-by-line), as well as the suggestions around naming and API choices. I also reviewed and confirmed that I can explain each step of the results (both Mathematics and Lean syntax).
To validate the change, I directly compiled the modified file and ran a targeted build. I also ran the style linter, and completed a full `lake build` and a full `lake test`.
Please note: This is one of my first mathlib contributions. I welcome corrections or suggestions about all aspects of this PR. I'm prepared to revise it as necessary, and to learn from the review.
|
t-measure-probability
LLM-generated
new-contributor
maintainer-merge
|
68/3 |
Mathlib/Probability/HasCondDistrib.lean |
1 |
33 |
['CoolRmal', 'EtienneC30', 'bocowgill', 'github-actions', 'leanprover-radar'] |
nobody |
2-32282 2 days ago |
25-17107 25 days ago |
48-8938 48 days |
| 41737 |
jjdishere author:jjdishere |
feat(CategoryTheory/AB5): AB5 instance of Ab with universe variables |
When u <= v <= w, we show `AB5OfSize.{u, v} Ab.{w}`.
(Only `AB5OfSize.{u, u + 1} Ab.{u + 1}` is need in my further application.)
Co-authored-by: @chrisflav
---
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|
t-algebra
maintainer-merge
label:t-algebra$ |
13/1 |
Mathlib/Algebra/Category/Grp/AB.lean |
1 |
5 |
['github-actions', 'leanprover-radar', 'robin-carlier'] |
ocfnash assignee:ocfnash |
1-85045 1 day ago |
61-62153 61 days ago |
61-62092 61 days |
| 40857 |
BryceT233 author:BryceT233 |
feat(RingTheory/Radical): radical of principal ideals in a UFD |
This PR resolves the "TODO" in `RingTheory/Radical/Basic.lean` by connecting `UniqueFactorizationMonoid.radical` with `Ideal.radical`.
---
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|
t-ring-theory
maintainer-merge
|
26/8 |
Mathlib/NumberTheory/NumberField/Ideal/KummerDedekind.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/Radical/Basic.lean |
3 |
17 |
['BryceT233', 'github-actions', 'tb65536'] |
mattrobball assignee:mattrobball |
1-72661 1 day ago |
4-14311 4 days ago |
80-18797 80 days |
| 42818 |
TJHeeringa author:TJHeeringa |
chore(Algebra/Module/Equiv): split Equiv into Basic, Pi, Prod and Submodule |
The existing file `Equiv` has become too large. This splits the file into `Basic`, `Pi`, `Prod` and `Submodule`.
---
Copyrights were adapted based on what was done in #42697. I didn't find out who wrote `piCongrRight`, only that Kevin wrote `piCongrLeft`.
The companion PR marking `Mathlib/Topology/Algebra/Module/Equiv.lean` as deprected is #42818.
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|
file-removed
t-topology
maintainer-merge
|
499/416 |
Mathlib.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Convex/ContinuousLinearEquiv.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Operator/ContinuousLinearMap.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Normed/Operator/Prod.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/RepresentationTheory/Continuous/Basic.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean,Mathlib/Topology/Algebra/Module/Complement.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Invertible.lean,Mathlib/Topology/Algebra/Module/Determinant.lean,Mathlib/Topology/Algebra/Module/Equiv/Basic.lean,Mathlib/Topology/Algebra/Module/Equiv/Pi.lean,Mathlib/Topology/Algebra/Module/Equiv/Prod.lean,Mathlib/Topology/Algebra/Module/Equiv/Submodule.lean,Mathlib/Topology/Algebra/Module/IsWeak.lean,Mathlib/Topology/Algebra/Module/LinearPMap.lean,Mathlib/Topology/Algebra/Module/ModuleTopology.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Module/TransferInstance.lean,Mathlib/Topology/Instances/RealVectorSpace.lean,Mathlib/Topology/Maps/Strict/Module.lean |
36 |
29 |
['TJHeeringa', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
1-57153 1 day ago |
2-47091 2 days ago |
24-43052 24 days |
| 43250 |
WenrongZou author:WenrongZou |
chore(Valuation/Integers): delete a TODO in `Valuation.Integers` |
I think [`Valuation.Integers`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/Integers.html#Valuation.Integers) is the characteristic predicate. If this is not what we want, I am happy to add a characteristic predicate in this file.
---
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|
t-ring-theory
easy
maintainer-merge
|
0/1 |
Mathlib/RingTheory/Valuation/Integers.lean |
1 |
3 |
['b-mehta', 'github-actions'] |
nobody |
1-18927 1 day ago |
14-17883 14 days ago |
14-17822 14 days |
| 39905 |
plp127 author:plp127 |
chore(Order/CompleteBooleanAlgebra): dualize `symmDiff` theorems |
Dualize some `symmDiff` theorems, and also generalize them from `CompleteBooleanAlgebra` to `Order.Coframe`.
---
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|
t-order
maintainer-merge
awaiting-author
|
62/39 |
Mathlib/Order/CompleteBooleanAlgebra.lean,Mathlib/Order/SymmDiff.lean |
2 |
6 |
['JovanGerb', 'YaelDillies', 'github-actions', 'plp127', 'vihdzp'] |
nobody |
1-3958 1 day ago |
1-3958 1 day ago |
102-61922 102 days |
| 43763 |
b-mehta author:b-mehta |
feat(Basic/IsEmpty/Defs): add Fin.isEmpty_iff |
A basic result but we don't have it in this form
---
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|
easy
t-data
maintainer-merge
|
10/4 |
Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Basic/IsEmpty/Defs.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean |
3 |
2 |
['github-actions', 'joneugster'] |
nobody |
0-70550 19 hours ago |
1-13106 1 day ago |
1-17423 1 day |
| 42705 |
artie2000 author:artie2000 |
refactor(Data/SetLike): make second parameter of `*.ofSetLike` implicit |
* Make second parameter of `LE.ofSetLike` and `PartialOrder.ofSetLike` implicit.
These constructors take a `SetLike A B` typeclass, in which `B`, being an `outParam`, is determined by `A`. Therefore we do not need to pass `B` explicitly.
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t-data
maintainer-merge
|
85/85 |
Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/LieRinehartAlgebra/Subalgebra.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Ring/Cone.lean,Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Star/Subsemiring.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/Young/YoungDiagram.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Set/PowersetCard.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/Geometry/Convex/Cone/Basic.lean,Mathlib/Geometry/Convex/Cone/Face/Lattice.lean,Mathlib/GroupTheory/FiniteIndexNormalSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/Projectivization/Subspace.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Order/BooleanSubalgebra.lean,Mathlib/Order/BourbakiWitt.lean,Mathlib/Order/CompleteSublattice.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/PFilter.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/Sublattice.lean,Mathlib/Order/Sublocale.lean,Mathlib/Order/UpperLower/Relative.lean,Mathlib/RepresentationTheory/Subrepresentation.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Subsemiring.lean,Mathlib/RingTheory/NonUnitalSubring/Defs.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Defs.lean,Mathlib/RingTheory/TwoSidedIdeal/Basic.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/Topology/Algebra/Group/ClosedSubgroup.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Sets/Closeds.lean,Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sets/Order.lean,MathlibTest/FBinop.lean |
70 |
3 |
['github-actions', 'joneugster'] |
nobody |
0-69175 19 hours ago |
30-82188 30 days ago |
30-84230 30 days |
| 37954 |
jdhart81 author:jdhart81 |
feat(Data/ENNReal/Inv): add ENNReal.div_mul_div_cancel |
Proves a / b * (b / c) = a / c for b ≠ 0, b ≠ ∞ in ENNReal. Proof via mul_div_assoc and existing div_mul_cancel.
AI Disclosure: This PR was developed with assistance from an LLM (Claude, Anthropic) for proof exploration and text drafting. The proof was compiled and verified locally by the contributor, who understands the mathematical content. This lemma is extracted from a larger formalization of information-theoretic bounds (Zenodo DOI: 10.5281/zenodo.19317983).
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t-data
new-contributor
maintainer-merge
|
8/0 |
Mathlib/Basic/ENNReal/Inv.lean,Mathlib/Data/EReal/Inv.lean |
2 |
14 |
['felixpernegger', 'github-actions', 'jdhart81', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
0-67949 18 hours ago |
1-36184 1 day ago |
35-62964 35 days |
| 42606 |
mo271 author:mo271 |
refactor(Data/Nat/Choose/Central): move and rename `four_pow_le_two_mul_add_one_mul_central_binom` |
Move `four_pow_le_two_mul_add_one_mul_central_binom` from [`Mathlib.Data.Nat.Choose.Sum`](file:///usr/local/google/home/firsching/mathlib4/Mathlib/Data/Nat/Choose/Sum.lean) to [`Mathlib.Data.Nat.Choose.Central`](file:///usr/local/google/home/firsching/mathlib4/Mathlib/Data/Nat/Choose/Central.lean) and adjust it to fit the file's API:
* **Rename**: `four_pow_le_two_mul_add_one_mul_central_binom` → [`four_pow_le_two_mul_add_one_mul_centralBinom`](file:///usr/local/google/home/firsching/mathlib4/Mathlib/Data/Nat/Choose/Central.lean#L123-L128) (aligning with `centralBinom` casing convention).
* **Statement**: Stated using `centralBinom n` rather than `(2 * n).choose n`.
* **Proof**: Simplified by using [`four_pow_le_two_mul_self_mul_centralBinom`](file:///usr/local/google/home/firsching/mathlib4/Mathlib/Data/Nat/Choose/Central.lean#L110-L122) directly, avoiding an import dependency on `Choose.Sum`.
* **Deprecation**: Added a deprecation alias for the old name.
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t-data
maintainer-merge
|
13/8 |
Mathlib/Data/Nat/Choose/Central.lean,Mathlib/Data/Nat/Choose/Sum.lean |
2 |
7 |
['SnirBroshi', 'github-actions', 'joneugster', 'mo271'] |
joneugster assignee:joneugster |
0-65874 18 hours ago |
0-65874 18 hours ago |
34-16245 34 days |
| 43670 |
kbuzzard author:kbuzzard |
feat: add NormedSpace.log |
We add `NormedSpace.log` following the design decisions of `NormedSpace.exp`.
This is the first in a series of PRs aiming to get p-adic logarithms into mathlib. This PR is just porting constructions which are already in the `Mathlib/Analysis/Normed/Algebra/Exponential.lean` file (I stopped at 200 lines; note that the first 60 lines are module docstring and TODOs).
This PR is for the Formal Conjectures repo, which needs p-adic logarithms in order to state Leopoldt's conjecture.
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t-analysis
maintainer-merge
|
199/0 |
Mathlib.lean,Mathlib/Analysis/Normed/Algebra/Logarithm.lean |
2 |
10 |
['Whysoserioushah', 'github-actions', 'kbuzzard'] |
nobody |
0-62979 17 hours ago |
3-66390 3 days ago |
3-66329 3 days |
| 41167 |
Timeroot author:Timeroot |
chore(Data/Num/Lemmas): golf `transfer` tactic |
Switched the local `transfer` tactic to use `grind` instead of `simp`. (which, imo, is pretty reasonable since this is just basic facts about Nat's all over.) This cleans up several proofs
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t-data
maintainer-merge
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25/40 |
Mathlib/Data/Num/Lemmas.lean |
1 |
10 |
['Timeroot', 'github-actions', 'joneugster', 'leanprover-radar', 'themathqueen'] |
nobody |
0-62817 17 hours ago |
0-62817 17 hours ago |
22-24903 22 days |
| 42523 |
joelriou author:joelriou |
feat(AlgebraicTopology/SimplicialSet): the fundamental groupoid |
---
- [x] depends on: #42526
- [x] depends on: #42527
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t-algebraic-topology
maintainer-merge
|
359/0 |
Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/FundamentalGroupoid/Basic.lean,MathlibTest/CategoryTheory/CheckDsimp.lean |
4 |
15 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] |
robin-carlier assignee:robin-carlier |
0-61936 17 hours ago |
2-85114 2 days ago |
30-72734 30 days |
| 43466 |
joelriou author:joelriou |
feat(CategoryTheory/Triangulated): t-exact functors |
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t-category-theory
maintainer-merge
|
77/0 |
Mathlib.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TExact.lean |
2 |
8 |
['github-actions', 'robin-carlier'] |
dagurtomas assignee:dagurtomas |
0-58874 16 hours ago |
1-82417 1 day ago |
7-82934 7 days |
| 43532 |
tb65536 author:tb65536 |
feat(GroupTheory/Finiteness): add general `IsMulFG` |
This PR adds a general `IsMulFG` predicate on semigroups that generalizes all four existing definitions `Monoid.FG`, `Submonoid.FG`, `Group.FG` and `Subgroup.FG`. Ultimately the plan will be to deprecate all four existing definitions in favor of `IsMulFG`.
This does not attempt to make a similar plan for `Module.Finite` / `Submodule.FG`.
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This is a version of #42200 with additional refactoring to demonstrate the sufficiency of the new API.
|
t-algebra
t-group-theory
maintainer-merge
label:t-algebra$ |
451/161 |
Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Generators.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Defs.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Defs.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean |
10 |
11 |
['eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'tb65536'] |
nobody |
0-52665 14 hours ago |
2-85683 2 days ago |
5-85152 5 days |
| 43786 |
kim-em author:kim-em |
fix: use the PR number in the deprecation reminder message |
This PR fixes the Zulip reminder that the `remove outdated deprecated declarations` workflow posts when a previous deprecation-removal PR is still open. The message interpolated `steps.find-pr.outputs.pr`, which `8BitJonny/gh-get-current-pr` documents as "the whole PR object", so the reminder rendered as a multi-kilobyte JSON dump instead of a linkified `#NNNNN`. The action exposes the number separately as `number`, so use that.
Visible in the July 15 and August 15 reminders in #nightly-testing-mathlib > Mathlib `remove outdated deprecated declarations`.
🤖 Prepared with Claude Code
https://claude.ai/code/session_012biNqQvhgQi3pPHQLcdPRv |
maintainer-merge
CI
|
1/1 |
.github/workflows/remove_deprecated_decls.yml |
1 |
2 |
['github-actions', 'joneugster'] |
nobody |
0-30464 8 hours ago |
0-31480 8 hours ago |
0-31419 8 hours |
| 43551 |
jessealama author:jessealama |
ci(weekly-lints): pass the build status to the Zulip report |
The report script marks a run with a green checkmark only when the caller sets `SUCCESS=true`. This workflow never did: the switch was added to the script in mathlib-ci in March 2026, and the nightly workflows there were updated to set it, but the weekly workflows in Mathlib and CSLib were not. The result is that every weekly report has been posted with a red X, even when the build was clean and had no linter messages.
The solution is to just capture the exit status of `lake build` and pass it through.
|
CI
maintainer-merge
|
7/1 |
.github/workflows/weekly-lints.yml |
1 |
2 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
0-17659 4 hours ago |
6-47588 6 days ago |
6-47527 6 days |
| 37910 |
wwylele author:wwylele |
feat(Geometry/Euclidean): volume of a simplex |
This defines the volume of a simplex in Euclidean geometry, and shows that it agrees with measure theory. It also adds the basic set of lemmas (base-and-height formula, reindex, positivity, map, and restrict). Further properties of the volume will be in future PRs.
Three new file s are introduced and organized in the following dependency chain:
Def.lean -> MeasureSimplex.Lean -> Basic.lean
The Def.lean file has the definition only. MeasureSimplex.lean pulls in measure theory. Basic.lean publicly imports Def.lean, and privately imports MeasureSimplex.lean. When a downstream file imports Basic.lean, the measure theory part is not exposed and all properties of the volume is provided.
---
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|
t-euclidean-geometry
t-measure-probability
maintainer-merge
|
349/6 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Altitude.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/Geometry/Euclidean/Volume/Basic.lean,Mathlib/Geometry/Euclidean/Volume/Def.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Euclidean/Volume/MeasureSimplex.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,MathlibTest/Tactic/Positivity.lean |
10 |
44 |
['CoolRmal', 'YanYablonovskiy', 'bjbraams', 'copilot-pull-request-reviewer', 'felixpernegger', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] |
CoolRmal assignee:CoolRmal |
0-3671 1 hour ago |
13-67898 13 days ago |
65-67709 65 days |
| 43775 |
JovanGerb author:JovanGerb |
feat: make `simp?` and `to_dual?`/`to_additive?` more concise |
This PR modifies `simps?` and `to_dual?`/`to_additive?` so that they only print what lemmas or translations have been added.
When you use these variants, the goal is usually to quickly see what the attribute did, which is not easily possible with how much trace they show. The extended traces are still available using the relevant trace options.
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[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
|
22/13 |
Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Translate/Core.lean,MathlibTest/Attribute/ToDual.lean,MathlibTest/Simps.lean |
4 |
3 |
['github-actions', 'joneugster'] |
nobody |
0-3299 54 minutes ago |
0-3364 55 minutes ago |
0-60007 16 hours |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 17623 |
astrainfinita author:astrainfinita |
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas |
Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593.
| New name | Old name |
|-------------------------|-------------------------|
| `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` |
| `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` |
| `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` |
| `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` |
The following lemmas use `ZeroLEOneClass`.
| New name | Old name |
|-------------------------|-------------------------|
| `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` |
| `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` |
| `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) |
| `(Left.)one_lt_mul₀` | |
| `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` |
| `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` |
| `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) |
| `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` |
---
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Split from #17593.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-zulip
t-order
label:t-algebra$ |
146/44 |
Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean |
2 |
11 |
['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] |
nobody |
662-70984 1 year ago |
669-63543 669 days ago |
33-64877 33 days |
| 15654 |
TpmKranz author:TpmKranz |
feat(Computability): language-preserving maps between NFA and RE |
Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs
Last chunk of #12648
---
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- [ ] depends on: #15651
- [ ] depends on: #15649
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
new-contributor
t-computability
merge-conflict
awaiting-zulip
|
985/2 |
Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib |
7 |
3 |
['github-actions', 'meithecatte'] |
nobody |
496-34261 1 year ago |
765-57446 765 days ago |
0-179 2 minutes |
| 17458 |
urkud author:urkud |
refactor(Algebra/Group): make `IsUnit` a typeclass |
Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`.
Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data)
I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one.
---
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|
merge-conflict
t-algebra
awaiting-zulip
label:t-algebra$ |
82/72 |
Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean |
26 |
12 |
['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] |
nobody |
436-14610 1 year ago |
707-48653 707 days ago |
0-66650 18 hours |
| 25218 |
kckennylau author:kckennylau |
feat(AlgebraicGeometry): Tate normal form of elliptic curves |
---
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|
merge-conflict
t-algebraic-geometry
awaiting-zulip
new-contributor
|
291/26 |
Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean |
5 |
31 |
['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] |
nobody |
436-13448 1 year ago |
468-74965 468 days ago |
6-44783 6 days |
| 28803 |
astrainfinita author:astrainfinita |
refactor: unbundle algebra from `ENormed*` |
Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`.
This PR continues the work from #23961.
- Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data.
- Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass.
|Old|New|
|---|---|
| `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` |
| `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` |
See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350)
------------
- [x] depends on: #28813 |
t-algebra
merge-conflict
slow-typeclass-synthesis
awaiting-zulip
t-analysis
label:t-algebra$ |
80/63 |
Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean |
14 |
28 |
['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] |
grunweg assignee:grunweg |
376-29093 1 year ago |
384-66647 384 days ago |
0-19882 5 hours |
| 28925 |
grunweg author:grunweg |
chore: remove `linear_combination'` tactic |
When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice".
One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate.
---
Do not merge before the zulip discussion has concluded!
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|
merge-conflict
file-removed
awaiting-zulip
|
0/564 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean |
5 |
4 |
['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
333-6303 10 months ago |
384-38100 384 days ago |
0-1 1 second |
| 30150 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory |
Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`.
To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead.
---
As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`.
I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`.
Next steps would be to:
- Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory`
- Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory`
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t-category-theory
large-import
new-contributor
merge-conflict
awaiting-zulip
t-meta
|
444/125 |
Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean |
3 |
22 |
['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] |
nobody |
305-17177 10 months ago |
344-82243 344 days ago |
1-160 1 day |
| 15651 |
TpmKranz author:TpmKranz |
feat(Computability/NFA): operations for Thompson's construction |
Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid.
Third chunk of #12648
---
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|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
307/5 |
Mathlib/Computability/NFA.lean |
1 |
27 |
['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
300-34309 9 months ago |
719-61697 719 days ago |
45-84611 45 days |
| 15649 |
TpmKranz author:TpmKranz |
feat(Computability): introduce Generalised NFA as bridge to Regular Expression |
Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid.
Second chunk of #12648
---
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|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
298/0 |
Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib |
5 |
7 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] |
nobody |
299-50550 9 months ago |
645-14080 645 days ago |
23-54870 23 days |
| 20648 |
anthonyde author:anthonyde |
feat: formalize regular expression -> εNFA |
The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness.
---
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|
merge-conflict
t-computability
awaiting-zulip
new-contributor
|
490/0 |
Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib |
3 |
7 |
['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] |
nobody |
299-1318 9 months ago |
496-34247 496 days ago |
75-77754 75 days |
| 11800 |
JADekker author:JADekker |
feat: KappaLindelöf spaces |
Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR.
---
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|
please-adopt
merge-conflict
t-topology
awaiting-zulip
|
301/2 |
Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean |
3 |
38 |
['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] |
nobody |
298-59584 9 months ago |
773-79866 773 days ago |
123-25636 123 days |
| 33368 |
urkud author:urkud |
feat: define `Complex.UnitDisc.shift` |
Also review the existing API
UPD: I'm going to define a `PSL(2, Real)` action instead.
---
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t-analysis
awaiting-zulip
merge-conflict
|
273/39 |
Mathlib.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean |
3 |
7 |
['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] |
j-loreaux assignee:j-loreaux |
250-9743 8 months ago |
250-56476 250 days ago |
7-33574 7 days |
| 20238 |
maemre author:maemre |
feat(Computability/DFA): Closure of regular languages under some set operations |
This shows that regular languages are closed under complement and intersection by constructing DFAs for them.
---
Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR.
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|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
159/0 |
Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean |
2 |
60 |
['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] |
nobody |
199-80952 6 months ago |
545-58891 545 days ago |
48-67492 48 days |
| 22361 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): nfa closure properties |
Add the closure properties union, intersection and reversal for NFA.
---
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new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
218/2 |
Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean |
2 |
91 |
['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
199-80936 6 months ago |
496-62830 496 days ago |
39-60738 39 days |
| 23929 |
meithecatte author:meithecatte |
feat(Computability/NFA): improve bound on pumping lemma |
---
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|
t-computability
awaiting-zulip
new-contributor
awaiting-author
|
101/10 |
Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean |
2 |
42 |
['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] |
nobody |
199-14565 6 months ago |
463-43864 463 days ago |
34-10092 34 days |
| 35524 |
grunweg author:grunweg |
feat: text-based linter against \t followed by tactic mode |
Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here.
[zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826)
---
There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this.
Works best when combined with #35523.
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t-linter
awaiting-zulip
merge-conflict
|
23/2 |
Mathlib/Tactic/Linter/TextBased.lean |
1 |
5 |
['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
180-32317 5 months ago |
206-79879 206 days ago |
0-187 3 minutes |
| 36890 |
vihdzp author:vihdzp |
chore(SetTheory): `le_mul_left` → `le_mul_of_pos_left` |
The new theorem names/statements match [`Nat.le_mul_of_pos_left`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Nat/Lemmas.html#Nat.le_mul_of_pos_left). The cardinal one has also been moved to an earlier file.
---
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|
t-set-theory
awaiting-zulip
merge-conflict
|
28/23 |
Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Free.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Notation.lean |
6 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
175-4721 5 months ago |
177-77861 177 days ago |
0-10825 3 hours |
| 35578 |
Shreyas4991 author:Shreyas4991 |
fix: writer monad should use an additive logging type |
The Writer monad's w type is supposed to be additive, not multiplicative. This is how it is conceptually used in Haskell (as a logging type). Haskell uses `Monoid` because it doesn't make a distinction between `AddMonoid` and `Monoid`.
[#mathlib4 > Writer should use an additive monoid @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Writer.20should.20use.20an.20additive.20monoid/near/574990415)
---
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|
t-data
awaiting-zulip
merge-conflict
|
10/10 |
Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean |
2 |
5 |
['Shreyas4991', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
171-15196 5 months ago |
205-35714 205 days ago |
0-18707 5 hours |
| 30750 |
SnirBroshi author:SnirBroshi |
feat(Data/Quot): `toSet` and `equivClassOf` |
Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient.
---
I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`.
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|
t-data
awaiting-author
awaiting-zulip
|
162/0 |
Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean |
4 |
8 |
['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'wrenna-robson'] |
TwoFX assignee:TwoFX |
152-73105 4 months ago |
291-106 291 days ago |
35-84279 35 days |
| 26299 |
adomani author:adomani |
perf: the `whitespace` linter only acts on modified files |
Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`.
The linter is also active on files that have had some error, as these are likely being modified!
The PR should also mitigate the speed-up that the linter introduced:
[#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877)
Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code.
Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification!
---
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|
t-linter
awaiting-zulip
awaiting-author
|
55/7 |
Mathlib/Tactic/Linter/Whitespace.lean |
1 |
20 |
['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] |
grunweg assignee:grunweg |
150-5420 4 months ago |
380-82898 380 days ago |
66-73556 66 days |
| 32742 |
LTolDe author:LTolDe |
feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace |
add new class `SuslinSpace` for a topological space that is an analytic set in itself
This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441).
---
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|
new-contributor
awaiting-zulip
t-measure-probability
awaiting-author
|
4/0 |
Mathlib/MeasureTheory/Constructions/Polish/Basic.lean |
1 |
10 |
['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] |
PatrickMassot assignee:PatrickMassot |
129-40537 4 months ago |
250-59938 250 days ago |
11-7507 11 days |
| 32608 |
PrParadoxy author:PrParadoxy |
feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets |
This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean:
* API for the various ways ι can be split into subsets; connect this
with the binary tensor product
-- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι.
Our primary motivation is to formalise the notion of "restricted tensor
products". This will be the content of a follow-up PR.
Beyond that, the Set API is natural in contexts where the index type has
an independent interpretation. An example is quantum physics, where ι
ranges over distinguishable degrees of freedom, and where its is common
practice to annotate objects by the set of indices they are defined on.
---
Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type:
https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean
---
- [x] depends on: #32598
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|
new-contributor
awaiting-zulip
t-algebra
WIP
merge-conflict
label:t-algebra$ |
300/2 |
Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean |
3 |
32 |
['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
86-37195 2 months ago |
265-52903 265 days ago |
10-66980 10 days |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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|
awaiting-zulip
merge-conflict
|
7/45 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean |
4 |
23 |
['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
74-57477 2 months ago |
137-71925 137 days ago |
30-49603 30 days |
| 39311 |
felixpernegger author:felixpernegger |
refactor: redefine `eLpNorm` at `p = 0` |
For Zulip discussion see https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/with/576356442. In partuclar this change is suggestion 2 in [#mathlib4 > eLpNorm junk value @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/near/576340531)
This redefined [MeasureTheory.eLpNorm](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/LpSeminorm/Defs.html#MeasureTheory.eLpNorm) at `p = 0`. Previously it was always `0` but now it is the measure of the support of the function (technical detail: In order to avoid having to add additional arguments to `eLpNorm`, we define it as the measure of the support of the norm of the function, but this is almost always the same)
The motivation for this comes from the counting measure, in particular this then unifies with https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p. In any case, it is "closer" to the actual mathematical definition
Unfortunately, since `eLpNorm` is widely used, the diff is very large and a lot of theorems break (i.e. now require `p != 0`). Oftentimes `p != 0` is still not required (sometimes with nontrivial arguments), I tried to avoid adding extra hypothesis whenever I could but I almost certainly missed some.
There now may also be places where we dont need `p != 0` as a hypothesis anymore (i.e. for `[Memℓp](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p)`), but this is not included in this PR.
---
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|
awaiting-zulip
merge-conflict
t-measure-probability
|
950/595 |
Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Holder.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Indicator.lean,Mathlib/MeasureTheory/Function/LpSeminorm/LpNorm.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Monotonicity.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/CompleteOfCompleteLp.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Kernel/Disintegration/CDFToKernel.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Probability/Moments/IntegrableExpMul.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/Process/Filtration.lean,MathlibTest/congr.lean |
45 |
42 |
['felixpernegger', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'sgouezel'] |
nobody |
65-70210 2 months ago |
100-67838 100 days ago |
5-67427 5 days |
| 40994 |
felixpernegger author:felixpernegger |
chore(Topology): rename `IndiscreteTopology` to `HasIndiscreteTopology` |
Per naming convention. https://leanprover-community.github.io/contribute/naming.html#prop-valued-classes .
See [this](https://github.com/leanprover-community/leanprover-community.github.io/pull/882) PR for further information.
Renaming discrete topology will be more involved, sinced its used much more widely
---
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|
t-topology
awaiting-author
merge-conflict
awaiting-zulip
|
154/109 |
Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/AlexandrovDiscrete.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Homotopy/Contractible.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Separation/Connected.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sheaves/PUnit.lean,Mathlib/Topology/UniformSpace/Separation.lean |
19 |
9 |
['felixpernegger', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
60-85506 1 month ago |
79-63503 79 days ago |
2-10191 2 days |
| 40061 |
gasparattila author:gasparattila |
chore(MeasureTheory/SetSemiring): deprecate `disjointOfUnion` |
This definition was only used in the proof of `AddContent.addContent_sUnion_le_sum`. Since it is defined using choice with very specific properties, it is unlikely to be reusable elsewhere.
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
awaiting-zulip
merge-conflict
|
10/0 |
Mathlib/MeasureTheory/SetSemiring.lean |
1 |
6 |
['RemyDegenne', 'WojciechCzernous', 'gasparattila', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
EtienneC30 assignee:EtienneC30 |
59-22563 1 month ago |
103-71256 103 days ago |
1-10686 1 day |
| 38957 |
wwylele author:wwylele |
chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` |
---
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|
tech debt
t-group-theory
awaiting-zulip
|
5/12 |
Mathlib/GroupTheory/DivisibleHull.lean |
1 |
14 |
['Komyyy', 'Vierkantor', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] |
nobody |
51-83035 1 month ago |
51-83035 51 days ago |
73-19357 73 days |
| 42066 |
lyfar author:lyfar |
feat(SimpleGraph/Coloring): add list-coloring compactness |
This is the focused part of [Lean Pool PR #275](https://github.com/Vilin97/lean-pool/pull/275) that does not duplicate Mathlib's existing ordinary de Bruijn--Erdős API. I brought it here after Vasily Ilin [recommended moving the genuinely new list-coloring part to Mathlib](https://github.com/Vilin97/lean-pool/pull/275#issuecomment-5066933313).
It adds `SimpleGraph.ListColoring`, restriction to induced subgraphs, compactness for explicitly finite color sets via `Set.Finite.rado_selection_subtype`, and the finite-induced-subgraph iff.
This is a formalized API for a standard corollary of Rado's selection lemma, not new mathematics.
AI disclosure: I used OpenAI Codex to inspect the current Mathlib API and contribution policy, adapt the list-coloring part of Lean Pool PR #275, implement this file, and run the verification commands below.
Verification:
```text
lake build Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe lint-style Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe batteries/runLinter Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe mk_all --check
git diff upstream/master...HEAD --check
```
|
t-combinatorics
LLM-generated
new-contributor
awaiting-author
awaiting-zulip
|
96/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/List.lean |
2 |
10 |
['SnirBroshi', 'felixpernegger', 'github-actions', 'lyfar'] |
nobody |
50-85968 1 month ago |
51-57491 51 days ago |
0-4355 1 hour |
| 38546 |
yhx-12243 author:yhx-12243 |
fix(Algebra/Module/Injective): changing the universe from the module's to the ring's |
Change the definition of
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
into
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
where `u` is the universe of ring, `v` is the universe of module,
to make it agree with `Module.Baer` and real mathematical definition, **without universe issues** (make the theorem [`Module.Baer.of_injective`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Module/Injective.html#Module.Baer.of_injective) not require `Small.{v, u} R` issue).
This type of adaption also appeared in the criterion `Module.Flat`, which also uses `Type u` on testing modules.
See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module .
---
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|
t-algebra
new-contributor
awaiting-zulip
awaiting-author
label:t-algebra$ |
57/43 |
Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean |
6 |
11 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors', 'wwylele', 'yhx-12243'] |
nobody |
48-67179 1 month ago |
140-39681 140 days ago |
0-26133 7 hours |
| 30668 |
astrainfinita author:astrainfinita |
feat: `QuotType` |
This typeclass is primarily for use by type synonyms of `Quot` and `Quotient`. Using `QuotType` API for type synonyms of `Quot` and `Quotient` will avoid defeq abuse caused by directly using `Quot` and `Quotient` APIs.
This PR also adds some typeclasses to support different ways to find the quotient map that should be used. See the documentation comments of these typeclasses for examples of usage.
---
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It's not a typical design to use these auxiliary typeclasses and term elaborators, but I haven't found a better way to support these notations.
Some of the naming may need to be discussed. For example:
- `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` ~~`mkQ_ h`~~. But this will also require changing the old lemma names.
- It would be helpful if the names of new type classes explained their functionality better.
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API)
This PR continues the work from #16421.
Original PR: https://github.com/leanprover-community/mathlib4/pull/16421 |
RFC
t-data
awaiting-zulip
awaiting-author
|
629/0 |
Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean |
3 |
23 |
['SnirBroshi', 'YaelDillies', 'astrainfinita', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
nobody |
38-19291 1 month ago |
330-10283 330 days ago |
0-81 1 minute |
| 39233 |
wrenna-robson author:wrenna-robson |
feat: `Pi.map` rename to `Function.map` |
This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace.
A future PR may update the names of *.piMap in line with this.
Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689)
General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-zulip
merge-conflict
|
130/121 |
Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/PiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean |
37 |
6 |
['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'wrenna-robson'] |
nobody |
36-47965 1 month ago |
124-59017 124 days ago |
0-7302 2 hours |
| 42007 |
felixpernegger author:felixpernegger |
chore: don't use `by assumption` for hypothesis with exposed name |
Let's say some goal if solve with `:= by assumption` and `assumption` is using `h` to solve it. Then `:= h` would also solve the goal (note: in most cases this is not possible, we would need to expose names before). This is more readable (tells the used explicitly what is being used) and at least in theory slightly faster.
This PR replace all such `by assumption` with the hypothesis directly. If this looks good / gets merged, I will make another PR replacing also `assumption`'s which do not immediately follow a `by`.
---
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|
tech debt
awaiting-author
awaiting-zulip
merge-conflict
|
20/20 |
Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureInjectives.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Analysis/Calculus/FDeriv/Congr.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Presentable/Type.lean,Mathlib/Combinatorics/Additive/ApproximateSubgroup.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/MeasureTheory/Function/UnifTight.lean,Mathlib/Order/Atoms.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Category/CompHausLike/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/Nobeling/Basic.lean,Mathlib/Topology/Category/TopCat/EffectiveEpi.lean |
18 |
15 |
['SnirBroshi', 'Vierkantor', 'felixpernegger', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
34-8250 1 month ago |
51-81392 51 days ago |
1-66762 1 day |
| 33031 |
chiyunhsu author:chiyunhsu |
feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem |
The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach.
---
Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111)
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|
t-combinatorics
new-contributor
awaiting-zulip
|
531/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean |
2 |
9 |
['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] |
b-mehta assignee:b-mehta |
31-47724 1 month ago |
227-63396 227 days ago |
42-22427 42 days |
| 42551 |
plp127 author:plp127 |
chore: rename `Set.mem_singleton` |
Rename `Set.mem_singleton` to `Set.mem_singleton_self` and rename `Set.mem_singleton_iff` to `Set.mem_singleton`. Also rename `Set.notMem_singleton_self` to `Set.notMem_singleton`. This is consistent with other container types like `Finset` and `List`.
---
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|
awaiting-zulip
merge-conflict
|
705/683 |
Archive/Imo/Imo2019Q2.lean,Archive/Imo/Imo2024Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q6.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/GrothendieckPower.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Category/Grp/Injective.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Homology/TotalComplexShift.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Pointwise/Stabilizer.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/HornColimits.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Projection.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Independent.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Connected.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Order.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/LogTrigonometric.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/CategoryTheory/GradedObject.lean,Mathlib/CategoryTheory/GradedObject/Unitor.lean,Mathlib/CategoryTheory/Preadditive/HomOrthogonal.lean,Mathlib/CategoryTheory/Presentable/SharplyLT/Basic.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/Quiver/Path/Vertices.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean |
363 |
3 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
30-32783 30 days ago |
31-85956 31 days ago |
4-40823 4 days |
| 43136 |
joneugster author:joneugster |
feat(Tactic/Linter/ValidatePRTitle): do not check the capitalisation of the commit subject |
There have been false-positives on abbreviations and proper names which seem to justify not to lint for this.
---
[#mathlib reviewers > Check PR title](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/Check.20PR.20title/with/604858902)
- [ ] depends on: https://github.com/leanprover-community/leanprover-community.github.io/pull/905
<!-- Your PR title will become the first line of the commit message.
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|
blocked-by-other-PR
t-linter
awaiting-zulip
|
3/51 |
Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean |
2 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
18-46476 18 days ago |
18-52063 18 days ago |
0-15 15 seconds |
| 42831 |
ray-shang author:ray-shang |
feat(CategoryTheory/Linear): category algebra of R-linear category |
We formalize `CategoryAlgebra R C`, the category algebra, of a R-linear category `C` where `R` is a commutative semiring.
We show `CategoryAlgebra R C` is a non-unital algebra. We formalize its universal property by defining a structure `Hom R C A` for well-defined maps between `C` and a non-unital algebra `A`, and show `Hom R C A` and `CategoryAlgebra R C →ₙₐ[R] A` are equivalent types. When `C` is finite type (has finite objects), we show `CategoryAlgebra R C` is a R-algebra, and the universal property is upgraded to R-algebra morphisms via the equivalence of types between `UnitalHom R C A` and `CategoryAlgebra R C →ₐ[R] A`.
Note the previous author adds `sumAddHom₂` to `Mathlib/Data/DFinsupp/BigOperators.lean`, a bilinear version of `sumAddHom`, along with its corresponding `@[simp]` lemma `sumAddHom₂_single`.
AI Usage: Gemini 3.1 Pro Extended Thinking is in use to generate proof terms for the custom induction principle to unwrap the nested direct sums of the category algebra. Human oversight and work determines the most efficient proof term.
---
<!-- Your PR title will become the first line of the commit message.
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|
t-category-theory
new-contributor
awaiting-author
awaiting-zulip
|
485/0 |
Mathlib.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean |
3 |
9 |
['b-reinke', 'github-actions', 'joelriou', 'ray-shang', 'robin-carlier'] |
nobody |
13-62891 13 days ago |
22-39038 22 days ago |
0-33029 9 hours |
| 43318 |
wpegden author:wpegden |
doc(1000): add the strong and weak perfect graph theorems |
Adds external-formalization entries for Q16680059 (strong perfect graph theorem) and Q2800071 (perfect graph theorem), both formalized in Lean 4 at https://github.com/wpegden/spgt with commit-pinned permalinks.
---
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-->
[](https://gitpod.io/from-referrer/)
|
new-contributor
awaiting-zulip
|
8/0 |
docs/1000.yaml |
1 |
13 |
['SnirBroshi', 'github-actions', 'grunweg', 'thorimur', 'wpegden', 'wwylele'] |
nobody |
5-38565 5 days ago |
11-54840 11 days ago |
0-72926 20 hours |
| 43634 |
attilavjda author:attilavjda |
doc(LinearAlgebra/Matrix): document `trace_units_conj'` |
Add a docstring for `Matrix.trace_units_conj'` and remove `linter.docPrime`.
Used Aristotle AI to find this issue and solution.
---
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|
t-algebra
awaiting-zulip
label:t-algebra$ |
2/1 |
Mathlib/LinearAlgebra/Matrix/Trace.lean |
1 |
7 |
['attilavjda', 'github-actions', 'themathqueen'] |
nobody |
3-61114 3 days ago |
3-61114 3 days ago |
0-84363 23 hours |
| 40022 |
chenson2018 author:chenson2018 |
chore(Algebra): refactor proofs where `grind?` fails |
These are sources of technical debt as now reported in the [weekly linting report](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Weekly.20linting.20log/with/544658968). The idea is that a successful grind proof can fail to report the theorems it used via grind?, which means that if these proofs break across toolchains that it becomes significantly harder to repair.
---
- [ ] depends on: #39808
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|
t-algebra
awaiting-zulip
merge-conflict
blocked-by-other-PR
label:t-algebra$ |
16/6 |
Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Notation/Support.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean |
6 |
5 |
['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] |
themathqueen assignee:themathqueen |
2-62275 2 days ago |
77-74009 77 days ago |
29-68789 29 days |
| 42692 |
Parcly-Taxel author:Parcly-Taxel |
refactor: unify `Set.mem_ofPred_eq` into `Set.mem_ofPred` |
Before:
```lean
@[simp, mfld_simps, push]
theorem mem_ofPred_eq {x : α} {p : α → Prop} : (x ∈ {y | p y}) = p x := rfl
theorem mem_ofPred {a : α} {p : α → Prop} : a ∈ { x | p x } ↔ p a := Iff.rfl
```
After:
```lean
@[simp, mfld_simps, push]
theorem mem_ofPred {x : α} {p : α → Prop} : (x ∈ {y | p y}) = p x := rfl
@[deprecated (since := "2026-08-12")] alias mem_ofPred_eq := mem_ofPred
```
Note that the lemma with iff is unusable by `dsimp`. |
tech debt
awaiting-zulip
|
1008/1011 |
Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/Phillips.lean,Counterexamples/SorgenfreyLine.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basis/Base.lean,Mathlib/Algebra/Lie/Basis/Basic.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Semisimple/Basic.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Notation/Support.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/IndicatorCard.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Group/Ideal.lean,Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Algebra/Order/Quantale.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Filter.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unitary.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Calculus/BumpFunction/SmoothApprox.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/TangentCone/Basic.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/DoublyStochasticMatrix.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/SimplicialComplex/AffineIndependentUnion.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/MeanInequalities.lean |
509 |
21 |
['Parcly-Taxel', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
2-12259 2 days ago |
25-84479 25 days ago |
4-7135 4 days |
| 39387 |
marcelolynch author:marcelolynch |
feat(Tactic/Linter): add superfluousExpose linter |
Dual of `privateModule`: lints against modules with `@[expose] public section` where no declaration needs its body visible downstream. Suggests removing the `@[expose]` modifier. The removal hides the bodies of the section and does not change downstream typechecking.
A declaration 'benefits from exposure' iff its body matters to downstream typechecking: plain `def`, plain `inductive`, `@[match_pattern]` def, `@[irreducible]` def / `irreducible_def`, `@[reducible]` def, or a `@[to_additive]`-decorated def. A hidden body of a `@[reducible]` def breaks even same-file public `rfl` proofs, so only `abbrev` carries its own exposure. Theorems, abbrevs, classes, structures, instances, `unsafe`/`partial` defs, compiler-generated auxiliaries, projections, matchers, and notation-generated parser entries do not.
The linter is a stateful linter (leanprover/lean4#14357). It tracks maximal regions of commands whose scope is public and carries the `expose` attribute, and it classifies the declarations of each command while the scopes of that command are still active. Two properties follow. A file with several expose sections gets one verdict per section, so one exposed-body `def` no longer masks a sibling section. And `scoped instance` and `local instance` declarations classify correctly, which an end-of-file check cannot do: after the `end`, those declarations look like plain defs.
The linter is conservative: known limitations produce a false negative, never a false positive that would break downstream builds. The module docstring lists them. The main case is tactic-implementation defs, such as the defs behind `elab` or `simproc_decl`, which count as ordinary defs.
Includes test files covering positive and negative cases, one file per case. A companion cleanup applies the suggestions to mathlib: #39388.
Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230
|
t-linter
LLM-generated
awaiting-zulip
|
1063/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/SuperfluousExpose.lean,MathlibTest/Linter/SuperfluousExpose.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ExposeInBlockComment.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ExposeOnNonPublicSection.lean,MathlibTest/Linter/SuperfluousExpose/Negative_Inductive.lean,MathlibTest/Linter/SuperfluousExpose/Negative_InstPrefixedDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_IrreducibleDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_MatchPattern.lean,MathlibTest/Linter/SuperfluousExpose/Negative_NoExposeSection.lean,MathlibTest/Linter/SuperfluousExpose/Negative_PlainDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ReducibleDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_TermPrefixedDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ToAdditive.lean,MathlibTest/Linter/SuperfluousExpose/Positive_AbbrevOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_ClassOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_LocalInstance.lean,MathlibTest/Linter/SuperfluousExpose/Positive_MultiSection.lean,MathlibTest/Linter/SuperfluousExpose/Positive_Notation.lean,MathlibTest/Linter/SuperfluousExpose/Positive_PartialDef.lean,MathlibTest/Linter/SuperfluousExpose/Positive_Recursors.lean,MathlibTest/Linter/SuperfluousExpose/Positive_ScopedInstance.lean,MathlibTest/Linter/SuperfluousExpose/Positive_TheoremOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_UnsafeDef.lean |
25 |
4 |
['eric-wieser', 'github-actions', 'joneugster', 'marcelolynch'] |
nobody |
0-30656 8 hours ago |
0-30656 8 hours ago |
33-4882 33 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 42569 |
astrainfinita author:astrainfinita |
refactor: use `cmpLE` in `LinearOrder` |
---
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t-order
tech debt
|
110/69 |
Mathlib/Data/Ordering/Basic.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/String/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Compare.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/OrderDual.lean,Mathlib/Order/Std.lean,scripts/nolints.json |
11 |
3 |
['JovanGerb', 'astrainfinita', 'github-actions'] |
nobody |
36-48772 1 month ago |
36-52027 36 days ago |
36-55267 36 days |
| 42451 |
FawadHa1der author:FawadHa1der |
perf(Analysis/Distribution/SchwartzSpace): split denseRange_toLpCLM off Basic to shorten the longest pole |
Shortening the "longest pole" in the mathlib build. LLM help was used.
Per [lake prof report](https://speed.lean-lang.org/mathlib4-out/c8830a1d9ceaffabd7c8c7493d9a9be3ead6ea74/) SchwartzSpace/Basic.lean sits on the longest pole. With this change SchwartzSpace/Basic no longer imports SmoothApprox( which imported the whole manifold chain) hence shortening the longest pole by **23s** of ~502 s
denseRange_toLpCLM is moved to a new file SchwartzSpace/DenseLp.lean. |
t-analysis
new-contributor
longest-pole
|
58/16 |
Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/DenseLp.lean,Mathlib/Analysis/Fourier/LpSpace.lean |
4 |
8 |
['FawadHa1der', 'github-actions', 'luigi-massacci', 'mathlib-merge-conflicts'] |
nobody |
26-59532 26 days ago |
26-61064 26 days ago |
33-75780 33 days |
| 42823 |
attilavjda author:attilavjda |
chore: let `to_additive` generate hand-written additive twins |
In eight `to_additive` sites the additive declaration is written out by hand, but `@[to_additive]` on the multiplicative one generates the same statement.
This PR replaces the glue with a tag, deletes the twins, and `(attr := simp)` is used where the additive side must stay a simp lemma.
Aristotle AI found these duplicates, and suggested the solution.
---
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|
tech debt
t-group-theory
new-contributor
|
8/60 |
Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Group/DivInvMonoid.lean,Mathlib/Algebra/Symmetrized.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Nilpotent.lean |
7 |
5 |
['attilavjda', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] |
nobody |
23-77378 23 days ago |
23-80325 23 days ago |
28-35245 28 days |
| 42561 |
SnirBroshi author:SnirBroshi |
feat(Order/RelSeries): order series by refinement |
Define a partial order on `RelSeries`, add basic lemmas for the operations (e.g. `p < p.append q`), and relate to `IsChain` on sets.
This lets us spell "maximal chain" using series.
---
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|
tech debt
t-order
|
150/6 |
Mathlib/Order/RelSeries.lean |
1 |
1 |
['github-actions'] |
nobody |
23-2688 23 days ago |
37-155 37 days ago |
37-12741 37 days |
| 43079 |
Parcly-Taxel author:Parcly-Taxel |
chore: rename underscore defs in `JacobiTheta.Bounds` |
In the `HurwitzKernelBounds` namespace:
* `f_nat, g_nat, F_nat -> f, g, F`
* `f_int, F_int -> fZ, FZ` |
t-number-theory
tech debt
|
111/93 |
Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/Bounds.lean |
3 |
3 |
['Parcly-Taxel', 'github-actions', 'jcommelin'] |
nobody |
20-78968 20 days ago |
21-10812 21 days ago |
21-10751 21 days |
| 39834 |
or4nge19 author:or4nge19 |
feat(LinearAlgebra): triangularizability via flags and block-triangular matrices |
Part 2/3 of #39139.
In finite dimension, shows that `⨆ μ, f.maxGenEigenspace μ = ⊤` is equivalent to:
- existence of a `Basis` whose `flag` lies in `f.invtSubmodule`;
- existence of an invariant `Flag`;
- `Matrix.BlockTriangular id` for `LinearMap.toMatrix b b f` in some basis.
Over an algebraically closed field, deduces the above from `IsAlgClosed.splits` on the charpoly. Compared to #39139 we do not introduce new global `IsTriangularizable` (or similar) predicates.
This also fills the previous TODO and replaces/shorten the proof of `iSup_maxGenEigenspace_eq_top` by a charpoly-splitting argument.
- [ ] depends on: #39829 [Part 1/3 of #39139. ]
Co-authored-by: [kuotsanhsu](https://github.com/kuotsanhsu) [learningstud@gmail.com](mailto:learningstud@gmail.com)
---
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|
t-algebra
large-import
tech debt
label:t-algebra$ |
381/76 |
Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean |
3 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
11-59198 11 days ago |
11-59201 11 days ago |
11-60747 11 days |
| 41776 |
JovanGerb author:JovanGerb |
fix(Order/Heyting/Regular): fix `Lattice` instance diamond |
This PR fixes a diamond in the `Lattice` instance on `Regular`.
It's a bit awkward that `Lattice` does not extend `Min`, so `fast_instance%` doesn't save us here.
---
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|
tech debt
t-order
|
1/2 |
Mathlib/Order/Heyting/Regular.lean |
1 |
10 |
['JovanGerb', 'YaelDillies', 'eric-wieser', 'github-actions', 'j-loreaux'] |
nobody |
11-44679 11 days ago |
11-44679 11 days ago |
32-84596 32 days |
| 42402 |
justus-springer author:justus-springer |
refactor(AlgebraicGeometry/Birational): phase out `Scheme.Over` for rational maps |
Split off from #40871
We refactor `PartialMap.IsOver` to not use `Scheme.Hom.IsOver`, which is being phased out. We still keep it as class with one field for now (as opposed to making it an abbrev for the morphism equation directly). This is because I think it's still useful to have instances for `PartialMap.restrict` and `PartialMap.toRationalMap`. However, some things which used to be instances (`isOver_comp` and `IsOver.compHom`) now need to be lemmas.
---
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|
t-algebraic-geometry
tech debt
|
100/86 |
Mathlib/AlgebraicGeometry/Birational/Composition.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean |
2 |
1 |
['github-actions'] |
nobody |
10-64146 10 days ago |
41-65576 41 days ago |
41-65515 41 days |
| 40537 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/Variables): define main degree |
This PR defines the **main degree** of a multivariate polynomial:
* `MvPolynomial.mainDegree p : Multiset σ` :
When `σ` is a linear order, `mainDegree p` is the multiset consisting of the maximal variable
among all variables appearing in `p`, appearing with its largest multiplicity among all monomials
in `p`.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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|
t-algebra
new-contributor
tech debt
label:t-algebra$ |
111/23 |
Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/SchwartzZippel.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean |
12 |
21 |
['SnkXyx', 'faenuccio', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
10-61922 10 days ago |
10-63511 10 days ago |
58-52643 58 days |
| 43095 |
plp127 author:plp127 |
chore(Data/PFunctor): reduce defeq abuse around `PFunctor.W` |
Reduce the defeq abuse around `PFunctor.W` by adding some API.
---
- [x] depends on: #43056
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|
t-data
tech debt
|
88/52 |
Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/PFunctor/Univariate/Basic.lean,Mathlib/Data/QPF/Univariate/Basic.lean |
3 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
10-46277 10 days ago |
10-57107 10 days ago |
10-57883 10 days |
| 42249 |
plp127 author:plp127 |
chore(FreeAbelianGroup): deprecate multiplication |
Deprecate multiplication on `FreeAbelianGroup` in favor of using `MonoidAlgebra`. Supersedes #27759.
---
- [x] depends on: #42245
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|
tech debt |
61/34 |
Mathlib/GroupTheory/FreeAbelianGroup.lean |
1 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
10-45320 10 days ago |
10-56995 10 days ago |
10-59966 10 days |
| 40901 |
vihdzp author:vihdzp |
feat: zero-dimensional spaces |
We introduce an abbreviation `ZeroDimensionalSpace X = HasSmallInductiveDimensionLT 1`. We prove, in various forms, the characterization of these spaces as those that have a basis of clopen sets. We then use this to restate or generalize various results throughout the library, which were formerly writing down the `IsTopologicalBasis {X | IsClopen X}` condition in full.
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- [x] depends on: #40897
- [x] depends on: #42271
Moved from #37444.
This diff is somewhat large, but a large portion of it is trival typeclass generalization in theorems from the `Profinite` file, and moving them elsewhere,
[](https://gitpod.io/from-referrer/)
|
t-topology
large-import
tech debt
|
353/292 |
Mathlib/Topology/Algebra/ClopenNhdofOne.lean,Mathlib/Topology/Category/Profinite/Basic.lean,Mathlib/Topology/ClopenBox.lean,Mathlib/Topology/Connected/TotallyDisconnected.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Separation/CompletelyRegular.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Separation/Lemmas.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/SmallInductiveDimension.lean |
11 |
23 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] |
jjdishere assignee:jjdishere |
10-26094 10 days ago |
17-15480 17 days ago |
26-75514 26 days |
| 43420 |
Timeroot author:Timeroot |
chore(AlgebraicGeometry): refactor and clean up AffineTransitionLimit.lean |
Refactor and cleans up very long proofs in AffineTransitionLimit.lean
Several proofs in this file were the largest in Mathlib (as measured by actual time to validate the proof term) and I noticed they were terrible. This was the result of some ~20 rounds of me with Claude together doing cleanup, not just shortening the proofs but also cleaning up the file in other ways. It involved pulling 15 helpful little lemmas out in other related files, reordering some declarations into an easier order to re-use, changing some section variables (to make declarations much more readable), a great reduction in `set_option backward.isDefEq.respectTransparency false` and `set_option backward.defeqAttrib.useBackward` debt, and of course, simplifying many proofs to use cleaner or more direct arguments.
The net result is 138 less lines than before, and instead of having a massive `Scheme.exists_π_app_comp_eq_of_locallyOfFinitePresentation` (and friends) that's 104 lines, nearly everything is at a sane length.
---
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|
tech debt |
532/670 |
Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/CategoryTheory/Filtered/Basic.lean |
7 |
2 |
['github-actions'] |
nobody |
10-17630 10 days ago |
10-20393 10 days ago |
10-20332 10 days |
| 42735 |
FrankieNC author:FrankieNC |
chore(Probability/ProbabilityMassFunction): remove defeq option in Monad |
Remove the `set_option backward.isDefEq.respectTransparency` false in `Mathlib/Probability/ProbabilityMassFunction/Monad.lean`, on `bindOnSupport_bindOnSupport`.
---
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|
tech debt
t-measure-probability
|
17/6 |
Mathlib/Probability/ProbabilityMassFunction/Monad.lean |
1 |
1 |
['github-actions'] |
EtienneC30 assignee:EtienneC30 |
7-26102 7 days ago |
31-61572 31 days ago |
31-61511 31 days |
| 43322 |
JovanGerb author:JovanGerb |
chore(Order/Atoms): use `to_dual` |
This PR uses `to_dual` for `IsAtomic`/`IsCoatomic` and `IsAtomistic`/`IsCoatomistic`.
---
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|
tech debt
t-order
|
118/334 |
Mathlib/Order/Atoms.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/ModularLattice.lean,Mathlib/Tactic/Translate/ToDual.lean |
4 |
3 |
['JovanGerb', 'github-actions', 'vihdzp'] |
nobody |
6-74252 6 days ago |
12-3493 12 days ago |
12-5845 12 days |
| 43473 |
Whysoserioushah author:Whysoserioushah |
chore(CategoryTheory/Preadditive/Biproducts): generalize universe and remove some set_options |
---
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|
tech debt
t-category-theory
|
12/43 |
Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts/BinaryFan.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Monoidal/Limits/Cokernels.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean |
4 |
3 |
['Whysoserioushah', 'github-actions', 'joelriou'] |
nobody |
6-67976 6 days ago |
6-69853 6 days ago |
7-72653 7 days |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): make `PFun` a one-field structure |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
- Redefine `PFun` as a structure with one field, `toFun : α → Part β`.
- Add the `FunLike (α →. β) α (Part β)` instance and configure `simps` projections.
- Add the projection and application simp lemmas required by the structure wrapper.
- Add `fun x ↦. ...` notation for partial-function literals.
- Adapt downstream equality proofs to use `PFun.ext` or `DFunLike.ext` where
`funext` no longer applies directly.
- Remove 33 local `backward.isDefEq.respectTransparency false` workarounds that
are no longer needed after the refactor.
### Downstream impact
The refactor mainly impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). Since `PFun` is no longer definitionally equal to `α → Part β`, tactics such as `rfl`, `simp`, and `funext` can no longer always see through the old raw-function representation.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. |
new-contributor
t-computability
tech debt
LLM-generated
maintainer-merge
|
599/544 |
Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean |
13 |
78 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
6-40388 6 days ago |
6-78537 6 days ago |
110-13601 110 days |
| 42794 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Limits/Shapes/WidePullBacks): use `to_dual` |
Use `to_dual` for wide pullbacks/pushouts.
Additionally:
- Tag `WidePullbackShape.mkCone` with `implicit_reducible` and remove some backward options.
---
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- [ ] depends on: #42861
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|
tech debt |
133/295 |
Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts/ExtraDegeneracy.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean |
5 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
6-35337 6 days ago |
9-53588 9 days ago |
10-21544 10 days |
| 41555 |
BryceT233 author:BryceT233 |
feat(Algebra/Order/Antidiagonal): connect `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` |
This PR connects `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` and cleans up `TendstoCofinite.lean`.
---
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|
tech debt |
33/12 |
Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Order/Filter/TendstoCofinite.lean |
2 |
13 |
['BryceT233', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
6-12092 6 days ago |
6-12092 6 days ago |
10-69400 10 days |
| 43434 |
Parcly-Taxel author:Parcly-Taxel |
refactor: remove `set_option` in `ZagierTwoSquares` |
I refactor one of my very first non-porting contributions to mathlib by changing `zagierSet` to a structure `Zagier.Triple` and rewriting the whole proof to avoid `set_option`s. This required changing the type of `card_fixedPoints_modEq` to accept just `α → α` rather than `Function.End α`.
No deprecations are added since this a leaf file in Archive. |
t-number-theory
tech debt
t-group-theory
|
112/169 |
Archive/ZagierTwoSquares.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean |
2 |
3 |
['Parcly-Taxel', 'github-actions', 'jcommelin'] |
nobody |
6-3309 6 days ago |
6-4978 6 days ago |
9-68766 9 days |
| 43565 |
Parcly-Taxel author:Parcly-Taxel |
refactor(Archive/FriendshipGraphs): golf everything |
Also remove the file's `set_option`s and `@[expose]`. Like #43434, no deprecations are added since this is a leaf file in Archive. |
tech debt |
103/295 |
Archive/Wiedijk100Theorems/FriendshipGraphs.lean |
1 |
7 |
['Parcly-Taxel', 'SnirBroshi', 'github-actions'] |
nobody |
6-1095 6 days ago |
6-1822 6 days ago |
6-18007 6 days |
| 43570 |
kim-em author:kim-em |
refactor(AlgebraicGeometry/Modules): transport pushforward along Opens.map functoriality isos |
This PR defines `Scheme.Modules.pushforwardId` and `pushforwardComp` by transporting the sheaf-of-modules isomorphisms along the existing `Opens.mapId` and `Opens.mapComp` (via `SheafOfModules.pushforwardCongr₂`) rather than by identifying `Opens.map (𝟙 X).base` with `𝟭` and `Opens.map (f ≫ g).base` with `Opens.map g.base ⋙ Opens.map f.base` by unfolding `Opens.map`. The componentwise simp lemmas become `M.presheaf.map_id` rather than `rfl`, and the pseudofunctor coherence fields are discharged explicitly since `cat_disch` no longer finds them by reflexivity. Also adds the simp lemma `Adj.eqToHom_τl`.
It is extracted from Paul Reichert's experiment making `Functor.comp` and `Functor.id` `instance_reducible` (https://github.com/leanprover-community/mathlib4/compare/master...leanprover-community:mathlib4-nightly-testing:datokrat/functorcomp, discussed at https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency), and depends on https://github.com/leanprover-community/mathlib4/pull/43569. The diff relative to that PR is https://github.com/kim-em/mathlib4/compare/associators-sheaves...opens-map.
🤖 Prepared with Claude Code |
tech debt |
516/139 |
Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/CategoryTheory/Adjunction/CompositionIso.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/Topology/Sheaves/Module.lean |
10 |
1 |
['github-actions'] |
nobody |
5-74142 5 days ago |
5-74975 5 days ago |
5-76736 5 days |
| 43569 |
kim-em author:kim-em |
refactor(ModuleCat): state pushforward coherence without identifying functor bracketings |
This PR makes the pushforward of (pre)sheaves of modules along the identity functor and along a composition of functors honestly typed. Currently `pushforwardId` takes `𝟙 S` at the type `S ⟶ (𝟭 C).op ⋙ S` and `pushforwardComp` takes `φ ≫ whiskerLeft F.op ψ` at the type `S ⟶ (F ⋙ G).op ⋙ T`, which only elaborate because `Functor.comp`, `Functor.id` and `Functor.op` unfold. The new `pushforwardIdHom` and `pushforwardCompHom` are the unitor and associator composed with `Functor.opId`/`Functor.opComp` (see `pushforwardIdHom_eq` and `pushforwardCompHom_eq`), and the associativity and unitality isomorphisms of pushforward and pullback are transported along the functor associator and unitors through the new `pushforwardCongr₂`/`pullbackCongr₂` (added at the presheaf level, together with `pushforwardCongr`, `pushforwardNatTrans` and `pushforwardNatIso`). The scheme-level pseudofunctor coherence lemmas in `AlgebraicGeometry.Modules.Sheaf` are reproved from these, and `Adjunction.leftAdjointCompIso_trans` is added for that purpose.
It is extracted from Paul Reichert's experiment making `Functor.comp` and `Functor.id` `instance_reducible` (https://github.com/leanprover-community/mathlib4/compare/master...leanprover-community:mathlib4-nightly-testing:datokrat/functorcomp, discussed at https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency), and is the (pre)sheaf-of-modules half of https://github.com/leanprover-community/mathlib4/pull/43566; it is independent of that PR.
🤖 Prepared with Claude Code |
tech debt |
480/131 |
Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/CategoryTheory/Adjunction/CompositionIso.lean,Mathlib/Topology/Sheaves/Module.lean |
9 |
1 |
['github-actions'] |
nobody |
5-73780 5 days ago |
5-75755 5 days ago |
5-77321 5 days |
| 40368 |
Sanghyeok0 author:Sanghyeok0 |
feat: add confluence predicates for relations |
This PR adds a minimal relation-level API for confluence-style properties:
* `Relation.IsDiamond`
* `Relation.IsConfluent`
* `Relation.IsChurchRosser`
It also adds the basic API connecting these predicates:
* `Relation.ReflTransGen.to_eqvGen`
* `Relation.Join.le_eqvGen`
* `Relation.IsChurchRosser.isConfluent`
* `Relation.IsConfluent.isChurchRosser`
* `Relation.IsChurchRosser.join_reflTransGen_eq_eqvGen`
The main downstream application is the polynomial-reduction development in
#41475. There, polynomial reduction is treated as an ordinary relation on
`MvPolynomial`, and these predicates are used to formulate confluence and the
Church--Rosser property.
A more general rewriting API exists in CSLib. This PR does not attempt to
upstream that API wholesale; its scope is intentionally limited to the
declarations needed by the downstream polynomial application.
The earlier version of this PR also introduced
`Relation.StronglyConfluent` and additional equivalence packaging. Those
declarations have been removed to keep this PR small and application-driven.
Reference: Becker, Weispfenning, and Kredel,
*Gröbner Bases: A Computational Approach to Commutative Algebra*.
AI usage disclosure:
I used OpenAI Codex to generate initial drafts of the definitions, theorem statements, proof scripts, and docstrings. I made the final decisions on the mathematical scope and API design, reviewed the generated code and final changes, and made a few edits to statements and docstrings.
---
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|
t-logic
new-contributor
tech debt
LLM-generated
|
103/25 |
Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/Logic/Relation.lean |
2 |
36 |
['Sanghyeok0', 'SnirBroshi', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
5-26097 5 days ago |
7-43584 7 days ago |
79-34797 79 days |
| 43038 |
plp127 author:plp127 |
feat: `Dyadic` is an ordered ring |
Prove `Dyadic` is a linearly ordered ring, providing instances for `LinearOrder`, `CommRing`, and `IsStrictOrderedRing`.
---
[From CGT](https://github.com/vihdzp/combinatorial-games/blob/99a469a2e02fd9fab9a717efe27f7fc84b880bbb/CombinatorialGames/Mathlib/Dyadic.lean).
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|
t-data
tech debt
|
188/89 |
Mathlib.lean,Mathlib/Data/Dyadic.lean,Mathlib/Data/Dyadic/OrderedRing.lean,Mathlib/Data/Dyadic/ToReal.lean,Mathlib/Tactic/Inclusion/Extension/IntervalDyadicReal/Init.lean |
5 |
13 |
['ADedecker', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] |
nobody |
5-21109 5 days ago |
6-21099 6 days ago |
22-30515 22 days |
| 43654 |
grunweg author:grunweg |
chore: rename `Isometry` to `Isometric` |
This definition refers to an unbundled isometry: let's keep the name `Isometry` for a future bundled version. The name `Isometric` is an adjective and avoids questions of whether to have an Is prefix. Suggested by `j-loreaux` [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/near/615105410).
We leave declarations such as IsometryEquiv, IsometryClass, LinearIsometry alone.
Rename done using Claude code, manually reviewed by myself.
Co-Authored-By: Claude Sonnet 5 [noreply@anthropic.com](mailto:noreply@anthropic.com)
---------
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|
tech debt
LLM-generated
|
1088/676 |
Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/AperiodicOrder/Delone/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/Commutative/PosPart.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/LinearIsometry.lean,Mathlib/Analysis/Convex/StrictConvexBetween.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/NormDet.lean,Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Algebra/GelfandFormula.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Ring/Lemmas.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/RCLike/ContinuousMap.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/Basic.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousCompMeasurePreserving.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/ContDiff.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/ResolventTransform.lean,Mathlib/MeasureTheory/SpecificCodomains/Pi.lean,Mathlib/NumberTheory/NumberField/Completion/InfinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/LiesOverInstances.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/Topology/Algebra/Module/EmbeddingOfLocal.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean,Mathlib/Topology/ContinuousMap/ContinuousMapZero.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/MetricSpace/Congruence.lean,Mathlib/Topology/MetricSpace/Cover.lean,Mathlib/Topology/MetricSpace/CoveringNumbers.lean,Mathlib/Topology/MetricSpace/Dilation.lean,Mathlib/Topology/MetricSpace/DilationEquiv.lean,Mathlib/Topology/MetricSpace/Gluing.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/MetricSpace/Kuratowski.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/MetricSpace/Polish.lean,Mathlib/Topology/MetricSpace/ProperSpace/Real.lean,Mathlib/Topology/MetricSpace/Similarity.lean,Mathlib/Topology/MetricSpace/UniformConvergence.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Urysohn.lean |
94 |
8 |
['github-actions', 'grunweg'] |
nobody |
3-51783 3 days ago |
3-53489 3 days ago |
3-62215 3 days |
| 41717 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Walk): more `transfer` API |
---
The Hamiltonian lemmas don't really need `Finite`; I'll fix this after #41435 (in whichever merges second).
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t-combinatorics
tech debt
maintainer-merge
|
54/23 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean |
4 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-67790 2 days ago |
62-12157 62 days ago |
62-12199 62 days |
| 43158 |
Thmoas-Guan author:Thmoas-Guan |
refactor(Ideal/Cotangent): make `Ideal.Cotangent` implicit reducible |
In this PR we make `Ideal.Cotangent` implicit reducible and remove some `set_option`s.
Authored-by: @Whysoserioushah
---
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|
tech debt |
14/19 |
Mathlib/RingTheory/Ideal/Cotangent.lean |
1 |
14 |
['Thmoas-Guan', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'pelicanhere'] |
pelicanhere assignee:pelicanhere |
2-63230 2 days ago |
5-57816 5 days ago |
17-77984 17 days |
| 43224 |
joelriou author:joelriou |
feat(Category/Abelian/Injective): interaction between `InjectiveResolution.extMk` and the connecting morphism |
Given a short exact sequence `0 → X₁ → X₂ → X₃ → 0` and an injective resolution `R` of an object `Y`, we give a concrete computation of the connecting homomorphism $$Ext^n(X_1, Y) \to Ext^{n + 1}(X_3, Y)$$.
---
- [x] depends on: #43492
- [x] depends on: #43086
- [x] depends on: #43089
- [x] depends on: #43103
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|
tech debt
t-category-theory
|
202/30 |
Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/SmallShiftedHom.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexSingle.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/CategoryTheory/Abelian/Injective/Ext.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean |
11 |
4 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
1-78917 1 day ago |
6-47532 6 days ago |
6-47483 6 days |
| 43436 |
JovanGerb author:JovanGerb |
perf: remove `simp` from `sup_of_le_left` and friends |
This PR removes `simp` from `sup_of_le_left` and friends, as these apply very generally and can cause expensive recursive `simp` calls. Instead, `simp` was added to lemmas like `sup_idem`, `sup_bot` and `max_zero`.
Many proofs have to be fixed. I did this manyally, mostly either by adding the removed lemma back to the `simp` call, or by writing the proof out more explicitly, or by using `grind`.
- I changed the `simp` set around `Real.toNNReal` and `Rat.toNNRat` to be compatible with the lack of a `sup_of_le_right` lemma (and to be consistent between the two).
- I added a `@[gcongr]` tag to `Cardinal.lift_le`.
The motivation for this PR is to reduce the performance impact of #42316. However, we could also decide that the performance impact is not so bad, and simply keep the `@[simp]` attributes.
---
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|
tech debt |
206/219 |
Archive/Examples/Kuratowski.lean,Archive/RiemannStieltjes.lean,Counterexamples/Phillips.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/IsBotOne.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/LocallyFiniteOrder.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Normed/Group/Real.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Operator/Perturbation/StrictByFinite.lean,Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Orthogonality.lean,Mathlib/Basic/ENNReal/Real.lean,Mathlib/Basic/NNReal/Defs.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Removal.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Sym/Sym2/Order.lean,Mathlib/FieldTheory/Cardinality.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DerivIntegrable.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Filter/ENNReal.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/ProjIcc.lean,Mathlib/Order/Interval/Set/UnorderedInterval.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Lattice/Congruence.lean,Mathlib/Order/MinMax.lean,Mathlib/Order/SupClosed.lean,Mathlib/Order/SymmDiff.lean,Mathlib/Order/WithBot.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Algebraic/Cardinality.lean,Mathlib/RingTheory/AlgebraicIndependent/RankAndCardinality.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/UniqueFactorizationDomain/GCDMonoid.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/ClusterPt.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/CompactlySupported.lean,Mathlib/Topology/ContinuousMap/Interval.lean,Mathlib/Topology/DiscreteSubset.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Semicontinuity/Basic.lean,MathlibTest/SetLike.lean |
85 |
5 |
['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
0-82021 22 hours ago |
1-624 1 day ago |
6-4011 6 days |
| 35548 |
gasparattila author:gasparattila |
fix(Tactic/FunProp): do not unfold semireducible definitions in the presence of projections |
Currently, `fun_prop` incorrectly unfolds semireducible definitions when a projection or recursor is applied. This PR fixes this by switching to `whnfR` together with `Lean.Meta.withCanUnfoldPred` for the custom unfolding logic.
Unfortunately, there are many proofs which rely on this bug. To avoid breaking proofs, the option `fun_prop.projDefaultTransparency` is added for locally restoring the previous behavior. Removing the uses of this option is left for future PRs.
---
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|
t-meta
tech debt
|
114/53 |
Mathlib/Analysis/Matrix/Normed.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Geometry/Convex/ConvexSpace/PathConnectedSpaceStdSimplex.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Group/ContinuousDiv.lean,Mathlib/Topology/Algebra/Group/ContinuousInv.lean,Mathlib/Topology/Algebra/Group/Matrix.lean,Mathlib/Topology/Algebra/Group/Torsor.lean,Mathlib/Topology/Algebra/Group/Units.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/IsWeak.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Semicontinuity/Michael.lean,MathlibTest/FunPropMinimal.lean |
32 |
12 |
['DavidLedvinka', 'JovanGerb', 'gasparattila', 'github-actions', 'j-loreaux', 'lecopivo', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
0-60885 16 hours ago |
12-38158 12 days ago |
23-17517 23 days |
| 43781 |
vlad902 author:vlad902 |
chore(AffineSpace/Independent): remove two `backward.isDefEq.respectTransparency` |
---
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|
t-algebra
tech debt
label:t-algebra$ |
3/7 |
Mathlib/LinearAlgebra/AffineSpace/Independent.lean |
1 |
1 |
['github-actions'] |
nobody |
0-42731 11 hours ago |
0-45092 12 hours ago |
0-45031 12 hours |
| 42655 |
mathlib-nolints author:mathlib-nolints |
chore: remove declarations deprecated between 2021-08-11 and 2026-02-11 |
I am happy to remove some deprecated declarations for you!
Please check if there are any remaining stray comments or other issues before merging.
---
[workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/31504133200) |
tech debt |
0/3 |
Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean |
1 |
6 |
['Parcly-Taxel', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
0-30337 8 hours ago |
0-31536 8 hours ago |
0-33997 9 hours |
| 42318 |
JovanGerb author:JovanGerb |
chore: remove `@[expose]` from meta definitions |
This PR removes `@[expose]` from sections where all definitions are meta definitions. (They might not be tagged `meta` explicitly, but they are meant only for execution and not for proving).
---
<!-- Your PR title will become the first line of the commit message.
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For details on the "pull request lifecycle" in mathlib, please see:
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Co-authors in the squash commit are gathered from two sources:
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one way to add co-authors is to include at least one commit authored by
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Second, co-authors can also be listed in lines at the very bottom of
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|
tech debt |
26/26 |
Mathlib/Lean/ContextInfo.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/Lean/Elab/Tactic/Basic.lean,Mathlib/Lean/Elab/Tactic/Meta.lean,Mathlib/Lean/Exception.lean,Mathlib/Lean/GoalsLocation.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/DiscrTree.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Basic.lean,Mathlib/Lean/Meta/Simp.lean,Mathlib/Lean/Meta/Tactic/Rewrite.lean,Mathlib/Lean/PrettyPrinter/Delaborator.lean,Mathlib/LinearAlgebra/Matrix/Notation.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic/Module.lean,Mathlib/Tactic/NormNum/Result.lean |
18 |
1 |
['github-actions'] |
joneugster assignee:joneugster |
0-26102 7 hours ago |
34-25858 34 days ago |
34-26841 34 days |
| 41447 |
SnirBroshi author:SnirBroshi |
chore(Combinatorics/SimpleGraph/Trails): golf and cleanup |
---
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In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
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Co-authors in the squash commit are gathered from two sources:
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one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
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Co-authored-by: Author Name <author@email.com>
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at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
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will be invisible to reviewers.
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
tech debt
|
49/87 |
Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean |
2 |
7 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
0-4924 1 hour ago |
1-24902 1 day ago |
65-18089 65 days |
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