algebra.group.conj_finite | 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

1126441d

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

327c3c0d

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,9 +3,9 @@ Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez
 -/
-import Mathbin.Algebra.Group.Conj
-import Mathbin.Data.Finite.Basic
-import Mathbin.Data.Fintype.Units
+import Algebra.Group.Conj
+import Data.Finite.Basic
+import Data.Fintype.Units
 
 #align_import algebra.group.conj_finite from "leanprover-community/mathlib"@"327c3c0d9232d80e250dc8f65e7835b82b266ea5"

327c3c0d

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,16 +2,13 @@
 Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez
-
-! This file was ported from Lean 3 source module algebra.group.conj_finite
-! leanprover-community/mathlib commit 327c3c0d9232d80e250dc8f65e7835b82b266ea5
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Algebra.Group.Conj
 import Mathbin.Data.Finite.Basic
 import Mathbin.Data.Fintype.Units
 
+#align_import algebra.group.conj_finite from "leanprover-community/mathlib"@"327c3c0d9232d80e250dc8f65e7835b82b266ea5"
+
 /-!
 # Conjugacy of elements of finite groups

327c3c0d

bump to nightly-2023-05-28-04

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

6797a637

Diff

@@ -30,10 +30,8 @@ instance [Fintype α] [DecidableRel (IsConj : α → α → Prop)] : Fintype (Co
 instance [Finite α] : Finite (ConjClasses α) :=
   Quotient.finite _
 
-instance [DecidableEq α] [Fintype α] : DecidableRel (IsConj : α → α → Prop) := fun a b =>
-  by
-  delta IsConj SemiconjBy
-  infer_instance
+instance [DecidableEq α] [Fintype α] : DecidableRel (IsConj : α → α → Prop) := fun a b => by
+  delta IsConj SemiconjBy; infer_instance
 
 instance [Fintype α] [DecidableRel (IsConj : α → α → Prop)] {a : α} : Fintype (conjugatesOf a) :=
   @Subtype.fintype _ _ (‹DecidableRel IsConj› a) _

327c3c0d

bump to nightly-2023-04-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/09079525fd01b3dda35e96adaa08d2f943e1648c

ff662d55

Diff

@@ -22,7 +22,7 @@ import Mathbin.Data.Fintype.Units
 
 variable {α : Type _} [Monoid α]
 
-attribute [local instance] IsConj.setoid
+attribute [local instance 100] IsConj.setoid
 
 instance [Fintype α] [DecidableRel (IsConj : α → α → Prop)] : Fintype (ConjClasses α) :=
   Quotient.fintype (IsConj.setoid α)

327c3c0d

bump to nightly-2023-02-21-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/bd9851ca476957ea4549eb19b40e7b5ade9428cc

1107b979

Changes in mathlib4

mathlib3

mathlib4

1126441d

chore: banish Type _ and Sort _ (#6499)

We remove all possible occurences of Type _ and Sort _ in favor of Type* and Sort*.

This has nice performance benefits.

32de3f67

Diff

@@ -14,7 +14,7 @@ import Mathlib.Data.Fintype.Units
 -/
 
 
-variable {α : Type _} [Monoid α]
+variable {α : Type*} [Monoid α]
 
 attribute [local instance] IsConj.setoid

1126441d

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

@@ -2,16 +2,13 @@
 Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez
-
-! This file was ported from Lean 3 source module algebra.group.conj_finite
-! leanprover-community/mathlib commit 1126441d6bccf98c81214a0780c73d499f6721fe
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Algebra.Group.Conj
 import Mathlib.Data.Finite.Basic
 import Mathlib.Data.Fintype.Units
 
+#align_import algebra.group.conj_finite from "leanprover-community/mathlib"@"1126441d6bccf98c81214a0780c73d499f6721fe"
+
 /-!
 # Conjugacy of elements of finite groups
 -/

1126441d

chore: use inferInstanceAs (#2074)

Drop

by delta mydef; infer_instance. This generates id _ in the proof.
show _, by infer_instance. This generates let in let; not sure if it's bad for defeq but a reducible inferInstanceAs should not be worse.

f9f9320a

Diff

@@ -27,9 +27,8 @@ instance [Fintype α] [DecidableRel (IsConj : α → α → Prop)] : Fintype (Co
 instance [Finite α] : Finite (ConjClasses α) :=
   Quotient.finite _
 
-instance [DecidableEq α] [Fintype α] : DecidableRel (IsConj : α → α → Prop) := fun a b => by
-  delta IsConj SemiconjBy
-  infer_instance
+instance [DecidableEq α] [Fintype α] : DecidableRel (IsConj : α → α → Prop) := fun a b =>
+  inferInstanceAs (Decidable (∃ c : αˣ, c.1 * a = b * c.1))
 
 instance conjugatesOf.fintype [Fintype α] [DecidableRel (IsConj : α → α → Prop)] {a : α} :
   Fintype (conjugatesOf a) :=

1126441d

port/Algebra.Group.ConjFinite (#1737)

feat: port Algebra.Group.ConjFinite
Initial file copy from mathport
automated fixes

2d1d0541

`algebra.group.conj_finite` ⟷ `Mathlib.Algebra.Group.ConjFinite`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 7 + 222

algebra.group.conj_finite ⟷ Mathlib.Algebra.Group.ConjFinite

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 7 + 222

`algebra.group.conj_finite` ⟷ `Mathlib.Algebra.Group.ConjFinite`