map_floor | Mathlib porting status

Changes since the initial port

The following section lists changes to this file in mathlib3 and mathlib4 that occured after the initial port. Most recent changes are shown first. Hovering over a commit will show all commits associated with the same mathlib3 commit.

Changes in mathlib3

32837559

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

08b081ea

bump to nightly-2024-04-07-08

mathlib commit https://github.com/leanprover-community/mathlib/commit/65a1391a0106c9204fe45bc73a039f056558cb83

b03b8656

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
 -/
 import Algebra.Order.Hom.Ring
-import Data.Polynomial.Reverse
+import Algebra.Polynomial.Reverse
 
 #align_import map_floor from "leanprover-community/mathlib"@"08b081ea92d80e3a41f899eea36ef6d56e0f1db0"

08b081ea

bump to nightly-2024-03-17-08

mathlib commit https://github.com/leanprover-community/mathlib/commit/65a1391a0106c9204fe45bc73a039f056558cb83

22f01ce4

Diff

@@ -98,7 +98,7 @@ instance : FloorRing ℤ[ε] :=
       · rintro ⟨_ | n, hn⟩
         · refine' (sub_one_lt _).trans _
           simpa using hn
-        · dsimp at hn 
+        · dsimp at hn
           simp [hn.1 _ n.zero_lt_succ]
       · exact fun h' => cast_lt.1 ((not_lt.1 h).trans_lt h')
     · split_ifs

08b081ea

bump to nightly-2023-09-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce64cd319bb6b3e82f31c2d38e79080d377be451

5655435f

Diff

@@ -3,8 +3,8 @@ Copyright (c) 2022 Yaël Dillies. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
 -/
-import Mathbin.Algebra.Order.Hom.Ring
-import Mathbin.Data.Polynomial.Reverse
+import Algebra.Order.Hom.Ring
+import Data.Polynomial.Reverse
 
 #align_import map_floor from "leanprover-community/mathlib"@"08b081ea92d80e3a41f899eea36ef6d56e0f1db0"

08b081ea

bump to nightly-2023-07-20-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/8ea5598db6caeddde6cb734aa179cc2408dbd345

9c56d0dd

Diff

@@ -2,15 +2,12 @@
 Copyright (c) 2022 Yaël Dillies. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
-
-! This file was ported from Lean 3 source module map_floor
-! leanprover-community/mathlib commit 08b081ea92d80e3a41f899eea36ef6d56e0f1db0
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Algebra.Order.Hom.Ring
 import Mathbin.Data.Polynomial.Reverse
 
+#align_import map_floor from "leanprover-community/mathlib"@"08b081ea92d80e3a41f899eea36ef6d56e0f1db0"
+
 /-!
 # Floors and ceils aren't preserved under ordered ring homomorphisms

08b081ea

bump to nightly-2023-07-17-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/bf2428c9486c407ca38b5b3fb10b87dad0bc99fa

a159b65f

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
 
 ! This file was ported from Lean 3 source module map_floor
-! leanprover-community/mathlib commit 328375597f2c0dd00522d9c2e5a33b6a6128feeb
+! leanprover-community/mathlib commit 08b081ea92d80e3a41f899eea36ef6d56e0f1db0
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -14,6 +14,9 @@ import Mathbin.Data.Polynomial.Reverse
 /-!
 # Floors and ceils aren't preserved under ordered ring homomorphisms
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 Intuitively, if `f : α → β` is an ordered ring homomorphism, then floors and ceils should be
 preserved by `f` because:
 * `f` preserves the naturals/integers in `α` and `β` because it's a ring hom.

32837559

bump to nightly-2023-06-13-21

mathlib commit https://github.com/leanprover-community/mathlib/commit/9fb8964792b4237dac6200193a0d533f1b3f7423

829520ac

Diff

@@ -53,10 +53,8 @@ def IntWithEpsilon :=
 deriving CommRing, Nontrivial, Inhabited
 #align counterexample.int_with_epsilon Counterexample.IntWithEpsilon
 
--- mathport name: «exprℤ[ε]»
 local notation "ℤ[ε]" => IntWithEpsilon
 
--- mathport name: exprε
 local notation "ε" => (X : ℤ[ε])
 
 namespace IntWithEpsilon

32837559

bump to nightly-2023-06-07-01

mathlib commit https://github.com/leanprover-community/mathlib/commit/a3209ddf94136d36e5e5c624b10b2a347cc9d090

176da745

Changes in mathlib4

mathlib3

mathlib4

32837559

chore: Rename nat_cast/int_cast/rat_cast to natCast/intCast/ratCast (#11486)

Now that I am defining NNRat.cast, I want a definitive answer to this naming issue. Plenty of lemmas in mathlib already use natCast/intCast/ratCast over nat_cast/int_cast/rat_cast, and this matches with the general expectation that underscore-separated name parts correspond to a single declaration.

145460b9

Diff

@@ -97,14 +97,14 @@ instance : FloorRing ℤ[ε] :=
       · rintro ⟨_ | n, hn⟩
         · refine' (sub_one_lt _).trans _
           simp at hn
-          rwa [int_cast_coeff_zero] at hn
+          rwa [intCast_coeff_zero] at hn
         · dsimp at hn
           simp [hn.1 _ n.zero_lt_succ]
-          rw [int_cast_coeff_zero]; simp
+          rw [intCast_coeff_zero]; simp
       · exact fun h' => cast_lt.1 ((not_lt.1 h).trans_lt h')
     · split_ifs with h
       · exact fun h' => h.trans_le (cast_le.2 <| sub_one_lt_iff.1 h')
-      · exact fun h' => ⟨0, by simp; rwa [int_cast_coeff_zero]⟩
+      · exact fun h' => ⟨0, by simp; rwa [intCast_coeff_zero]⟩
 
 /-- The ordered ring homomorphisms from `ℤ[ε]` to `ℤ` that "forgets" the `ε`s. -/
 def forgetEpsilons : ℤ[ε] →+*o ℤ where
@@ -131,8 +131,8 @@ theorem forgetEpsilons_floor_lt (n : ℤ) :
     forgetEpsilons ⌊(n - ↑ε : ℤ[ε])⌋ < ⌊forgetEpsilons (n - ↑ε)⌋ := by
   suffices ⌊(n - ↑ε : ℤ[ε])⌋ = n - 1 by simp [this]
   have : (0 : ℤ[ε]) < ε := ⟨1, by simp⟩
-  exact (if_neg <| by rw [coeff_sub, int_cast_coeff_zero]; simp [this]).trans (by
-    rw [coeff_sub, int_cast_coeff_zero]; simp)
+  exact (if_neg <| by rw [coeff_sub, intCast_coeff_zero]; simp [this]).trans (by
+    rw [coeff_sub, intCast_coeff_zero]; simp)
 #align counterexample.int_with_epsilon.forget_epsilons_floor_lt Counterexample.IntWithEpsilon.forgetEpsilons_floor_lt
 
 /-- The ceil of `n + ε` is `n + 1` but its image under `forgetEpsilons` is `n`, whose ceil is

32837559

move(Polynomial): Move out of Data (#11751)

Polynomial and MvPolynomial are algebraic objects, hence should be under Algebra (or at least not under Data)

56e439ec

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
 -/
 import Mathlib.Algebra.Order.Hom.Ring
-import Mathlib.Data.Polynomial.Reverse
+import Mathlib.Algebra.Polynomial.Reverse
 
 #align_import map_floor from "leanprover-community/mathlib"@"328375597f2c0dd00522d9c2e5a33b6a6128feeb"

32837559

chore: script to replace headers with #align_import statements (#5979)

depends on: #5966

Co-authored-by: Eric Wieser <wieser.eric@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

89aa3a3b

Diff

@@ -2,15 +2,12 @@
 Copyright (c) 2022 Yaël Dillies. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Yaël Dillies
-
-! This file was ported from Lean 3 source module map_floor
-! leanprover-community/mathlib commit 328375597f2c0dd00522d9c2e5a33b6a6128feeb
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Algebra.Order.Hom.Ring
 import Mathlib.Data.Polynomial.Reverse
 
+#align_import map_floor from "leanprover-community/mathlib"@"328375597f2c0dd00522d9c2e5a33b6a6128feeb"
+
 /-!
 # Floors and ceils aren't preserved under ordered ring homomorphisms

32837559

chore: bump to nightly-2023-07-01 (#5409)

depends on: https://github.com/leanprover/std4/pull/163
depends on: #5584
depends on: #5715
depends on: #5729
depends on: https://github.com/leanprover/std4/pull/173

Co-authored-by: Komyyy <pol_tta@outlook.jp> Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@anu.edu.au> Co-authored-by: Ruben Van de Velde <65514131+Ruben-VandeVelde@users.noreply.github.com> Co-authored-by: Mario Carneiro <di.gama@gmail.com>

906f7221

Diff

@@ -88,7 +88,7 @@ theorem pos_iff {p : ℤ[ε]} : 0 < p ↔ 0 < p.trailingCoeff := by
 instance : LinearOrderedCommRing ℤ[ε] :=
   { IntWithEpsilon.linearOrder, IntWithEpsilon.commRing, IntWithEpsilon.orderedAddCommGroup,
     IntWithEpsilon.nontrivial with
-    zero_le_one := Or.inr ⟨0, by simp; rw [coeff_zero, coeff_one_zero]; linarith⟩
+    zero_le_one := Or.inr ⟨0, by simp⟩
     mul_pos := fun p q => by simp_rw [pos_iff]; rw [trailingCoeff_mul]; exact mul_pos}
 
 instance : FloorRing ℤ[ε] :=

32837559

feat: port NumberTheory.PrimesCongruentOne (#5146)

3de751e5

`map_floor` ⟷ `Counterexamples.MapFloor`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 418

map_floor ⟷ Counterexamples.MapFloor

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 418

`map_floor` ⟷ `Counterexamples.MapFloor`