group_theory.group_action.sigma | 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

f1a2caaf

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

448144f7

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,7 +3,7 @@ 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.GroupTheory.GroupAction.Defs
+import GroupTheory.GroupAction.Defs
 
 #align_import group_theory.group_action.sigma from "leanprover-community/mathlib"@"448144f7ae193a8990cb7473c9e9a01990f64ac7"

448144f7

bump to nightly-2023-08-17-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/32a7e535287f9c73f2e4d2aef306a39190f0b504

60285dcc

Diff

@@ -81,7 +81,7 @@ end SMul
 @[to_additive]
 instance {m : Monoid M} [∀ i, MulAction M (α i)] : MulAction M (Σ i, α i)
     where
-  mul_smul a b x := by cases x; rw [smul_mk, smul_mk, smul_mk, mul_smul]
+  hMul_smul a b x := by cases x; rw [smul_mk, smul_mk, smul_mk, mul_smul]
   one_smul x := by cases x; rw [smul_mk, one_smul]
 
 end Sigma

448144f7

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,14 +2,11 @@
 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 group_theory.group_action.sigma
-! leanprover-community/mathlib commit 448144f7ae193a8990cb7473c9e9a01990f64ac7
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.GroupTheory.GroupAction.Defs
 
+#align_import group_theory.group_action.sigma from "leanprover-community/mathlib"@"448144f7ae193a8990cb7473c9e9a01990f64ac7"
+
 /-!
 # Sigma instances for additive and multiplicative actions

448144f7

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -38,17 +38,21 @@ variable [∀ i, SMul M (α i)] [∀ i, SMul N (α i)] (a : M) (i : ι) (b : α
 instance : SMul M (Σ i, α i) :=
   ⟨fun a => Sigma.map id fun i => (· • ·) a⟩
 
+#print Sigma.smul_def /-
 @[to_additive]
 theorem smul_def : a • x = x.map id fun i => (· • ·) a :=
   rfl
 #align sigma.smul_def Sigma.smul_def
 #align sigma.vadd_def Sigma.vadd_def
+-/
 
+#print Sigma.smul_mk /-
 @[simp, to_additive]
 theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
   rfl
 #align sigma.smul_mk Sigma.smul_mk
 #align sigma.vadd_mk Sigma.vadd_mk
+-/
 
 @[to_additive]
 instance [SMul M N] [∀ i, IsScalarTower M N (α i)] : IsScalarTower M N (Σ i, α i) :=
@@ -62,12 +66,14 @@ instance [∀ i, SMulCommClass M N (α i)] : SMulCommClass M N (Σ i, α i) :=
 instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsCentralScalar M (Σ i, α i) :=
   ⟨fun a x => by cases x; rw [smul_mk, smul_mk, op_smul_eq_smul]⟩
 
+#print Sigma.FaithfulSMul' /-
 /-- This is not an instance because `i` becomes a metavariable. -/
 @[to_additive "This is not an instance because `i` becomes a metavariable."]
 protected theorem FaithfulSMul' [FaithfulSMul M (α i)] : FaithfulSMul M (Σ i, α i) :=
   ⟨fun x y h => eq_of_smul_eq_smul fun a : α i => heq_iff_eq.1 (ext_iff.1 <| h <| mk i a).2⟩
 #align sigma.has_faithful_smul' Sigma.FaithfulSMul'
 #align sigma.has_faithful_vadd' Sigma.FaithfulVAdd'
+-/
 
 @[to_additive]
 instance [Nonempty ι] [∀ i, FaithfulSMul M (α i)] : FaithfulSMul M (Σ i, α i) :=

448144f7

bump to nightly-2023-06-01-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/cca40788df1b8755d5baf17ab2f27dacc2e17acb

b9c87c70

Diff

@@ -32,10 +32,10 @@ namespace Sigma
 
 section SMul
 
-variable [∀ i, SMul M (α i)] [∀ i, SMul N (α i)] (a : M) (i : ι) (b : α i) (x : Σi, α i)
+variable [∀ i, SMul M (α i)] [∀ i, SMul N (α i)] (a : M) (i : ι) (b : α i) (x : Σ i, α i)
 
 @[to_additive Sigma.hasVadd]
-instance : SMul M (Σi, α i) :=
+instance : SMul M (Σ i, α i) :=
   ⟨fun a => Sigma.map id fun i => (· • ·) a⟩
 
 @[to_additive]
@@ -51,32 +51,32 @@ theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
 #align sigma.vadd_mk Sigma.vadd_mk
 
 @[to_additive]
-instance [SMul M N] [∀ i, IsScalarTower M N (α i)] : IsScalarTower M N (Σi, α i) :=
+instance [SMul M N] [∀ i, IsScalarTower M N (α i)] : IsScalarTower M N (Σ i, α i) :=
   ⟨fun a b x => by cases x; rw [smul_mk, smul_mk, smul_mk, smul_assoc]⟩
 
 @[to_additive]
-instance [∀ i, SMulCommClass M N (α i)] : SMulCommClass M N (Σi, α i) :=
+instance [∀ i, SMulCommClass M N (α i)] : SMulCommClass M N (Σ i, α i) :=
   ⟨fun a b x => by cases x; rw [smul_mk, smul_mk, smul_mk, smul_mk, smul_comm]⟩
 
 @[to_additive]
-instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsCentralScalar M (Σi, α i) :=
+instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsCentralScalar M (Σ i, α i) :=
   ⟨fun a x => by cases x; rw [smul_mk, smul_mk, op_smul_eq_smul]⟩
 
 /-- This is not an instance because `i` becomes a metavariable. -/
 @[to_additive "This is not an instance because `i` becomes a metavariable."]
-protected theorem FaithfulSMul' [FaithfulSMul M (α i)] : FaithfulSMul M (Σi, α i) :=
+protected theorem FaithfulSMul' [FaithfulSMul M (α i)] : FaithfulSMul M (Σ i, α i) :=
   ⟨fun x y h => eq_of_smul_eq_smul fun a : α i => heq_iff_eq.1 (ext_iff.1 <| h <| mk i a).2⟩
 #align sigma.has_faithful_smul' Sigma.FaithfulSMul'
 #align sigma.has_faithful_vadd' Sigma.FaithfulVAdd'
 
 @[to_additive]
-instance [Nonempty ι] [∀ i, FaithfulSMul M (α i)] : FaithfulSMul M (Σi, α i) :=
+instance [Nonempty ι] [∀ i, FaithfulSMul M (α i)] : FaithfulSMul M (Σ i, α i) :=
   Nonempty.elim ‹_› fun i => Sigma.FaithfulSMul' i
 
 end SMul
 
 @[to_additive]
-instance {m : Monoid M} [∀ i, MulAction M (α i)] : MulAction M (Σi, α i)
+instance {m : Monoid M} [∀ i, MulAction M (α i)] : MulAction M (Σ i, α i)
     where
   mul_smul a b x := by cases x; rw [smul_mk, smul_mk, smul_mk, mul_smul]
   one_smul x := by cases x; rw [smul_mk, one_smul]

448144f7

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -38,24 +38,12 @@ variable [∀ i, SMul M (α i)] [∀ i, SMul N (α i)] (a : M) (i : ι) (b : α
 instance : SMul M (Σi, α i) :=
   ⟨fun a => Sigma.map id fun i => (· • ·) a⟩
 
-/- warning: sigma.smul_def -> Sigma.smul_def is a dubious translation:
-lean 3 declaration is
-  forall {ι : Type.{u1}} {M : Type.{u2}} {α : ι -> Type.{u3}} [_inst_1 : forall (i : ι), SMul.{u2, u3} M (α i)] (a : M) (x : Sigma.{u1, u3} ι (fun (i : ι) => α i)), Eq.{succ (max u1 u3)} (Sigma.{u1, u3} ι (fun (i : ι) => α i)) (SMul.smul.{u2, max u1 u3} M (Sigma.{u1, u3} ι (fun (i : ι) => α i)) (Sigma.hasSmul.{u1, u2, u3} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i)) a x) (Sigma.map.{u1, u1, u3, u3} ι ι (fun (i : ι) => α i) (fun (i : ι) => α i) (id.{succ u1} ι) (fun (i : ι) => SMul.smul.{u2, u3} M (α i) (_inst_1 i) a) x)
-but is expected to have type
-  forall {ι : Type.{u3}} {M : Type.{u1}} {α : ι -> Type.{u2}} [_inst_1 : forall (i : ι), SMul.{u1, u2} M (α i)] (a : M) (x : Sigma.{u3, u2} ι (fun (i : ι) => α i)), Eq.{max (succ u3) (succ u2)} (Sigma.{u3, u2} ι (fun (i : ι) => α i)) (HSMul.hSMul.{u1, max u3 u2, max u3 u2} M (Sigma.{u3, u2} ι (fun (i : ι) => α i)) (Sigma.{u3, u2} ι (fun (i : ι) => α i)) (instHSMul.{u1, max u3 u2} M (Sigma.{u3, u2} ι (fun (i : ι) => α i)) (Sigma.instSMulSigma.{u3, u1, u2} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i))) a x) (Sigma.map.{u3, u3, u2, u2} ι ι (fun (i : ι) => α i) α (id.{succ u3} ι) (fun (i : ι) => (fun (x._@.Mathlib.GroupTheory.GroupAction.Sigma._hyg.231 : M) (x._@.Mathlib.GroupTheory.GroupAction.Sigma._hyg.233 : α i) => HSMul.hSMul.{u1, u2, u2} M (α i) (α (id.{succ u3} ι i)) (instHSMul.{u1, u2} M (α i) (_inst_1 i)) x._@.Mathlib.GroupTheory.GroupAction.Sigma._hyg.231 x._@.Mathlib.GroupTheory.GroupAction.Sigma._hyg.233) a) x)
-Case conversion may be inaccurate. Consider using '#align sigma.smul_def Sigma.smul_defₓ'. -/
 @[to_additive]
 theorem smul_def : a • x = x.map id fun i => (· • ·) a :=
   rfl
 #align sigma.smul_def Sigma.smul_def
 #align sigma.vadd_def Sigma.vadd_def
 
-/- warning: sigma.smul_mk -> Sigma.smul_mk is a dubious translation:
-lean 3 declaration is
-  forall {ι : Type.{u1}} {M : Type.{u2}} {α : ι -> Type.{u3}} [_inst_1 : forall (i : ι), SMul.{u2, u3} M (α i)] (a : M) (i : ι) (b : α i), Eq.{succ (max u1 u3)} (Sigma.{u1, u3} ι (fun (i : ι) => α i)) (SMul.smul.{u2, max u1 u3} M (Sigma.{u1, u3} ι (fun (i : ι) => α i)) (Sigma.hasSmul.{u1, u2, u3} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i)) a (Sigma.mk.{u1, u3} ι (fun (i : ι) => α i) i b)) (Sigma.mk.{u1, u3} ι (fun (i : ι) => α i) i (SMul.smul.{u2, u3} M (α i) (_inst_1 i) a b))
-but is expected to have type
-  forall {ι : Type.{u3}} {M : Type.{u1}} {α : ι -> Type.{u2}} [_inst_1 : forall (i : ι), SMul.{u1, u2} M (α i)] (a : M) (i : ι) (b : α i), Eq.{max (succ u3) (succ u2)} (Sigma.{u3, u2} ι α) (HSMul.hSMul.{u1, max u2 u3, max u3 u2} M (Sigma.{u3, u2} ι α) (Sigma.{u3, u2} ι α) (instHSMul.{u1, max u3 u2} M (Sigma.{u3, u2} ι α) (Sigma.instSMulSigma.{u3, u1, u2} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i))) a (Sigma.mk.{u3, u2} ι α i b)) (Sigma.mk.{u3, u2} ι α i (HSMul.hSMul.{u1, u2, u2} M (α i) (α i) (instHSMul.{u1, u2} M (α i) (_inst_1 i)) a b))
-Case conversion may be inaccurate. Consider using '#align sigma.smul_mk Sigma.smul_mkₓ'. -/
 @[simp, to_additive]
 theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
   rfl
@@ -74,12 +62,6 @@ instance [∀ i, SMulCommClass M N (α i)] : SMulCommClass M N (Σi, α i) :=
 instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsCentralScalar M (Σi, α i) :=
   ⟨fun a x => by cases x; rw [smul_mk, smul_mk, op_smul_eq_smul]⟩
 
-/- warning: sigma.has_faithful_smul' -> Sigma.FaithfulSMul' is a dubious translation:
-lean 3 declaration is
-  forall {ι : Type.{u1}} {M : Type.{u2}} {α : ι -> Type.{u3}} [_inst_1 : forall (i : ι), SMul.{u2, u3} M (α i)] (i : ι) [_inst_3 : FaithfulSMul.{u2, u3} M (α i) (_inst_1 i)], FaithfulSMul.{u2, max u1 u3} M (Sigma.{u1, u3} ι (fun (i : ι) => α i)) (Sigma.hasSmul.{u1, u2, u3} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i))
-but is expected to have type
-  forall {ι : Type.{u1}} {M : Type.{u3}} {α : ι -> Type.{u2}} [_inst_1 : forall (i : ι), SMul.{u3, u2} M (α i)] (i : ι) [_inst_3 : FaithfulSMul.{u3, u2} M (α i) (_inst_1 i)], FaithfulSMul.{u3, max u2 u1} M (Sigma.{u1, u2} ι (fun (i : ι) => α i)) (Sigma.instSMulSigma.{u1, u3, u2} ι M (fun (i : ι) => α i) (fun (i : ι) => _inst_1 i))
-Case conversion may be inaccurate. Consider using '#align sigma.has_faithful_smul' Sigma.FaithfulSMul'ₓ'. -/
 /-- This is not an instance because `i` becomes a metavariable. -/
 @[to_additive "This is not an instance because `i` becomes a metavariable."]
 protected theorem FaithfulSMul' [FaithfulSMul M (α i)] : FaithfulSMul M (Σi, α i) :=

448144f7

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -64,21 +64,15 @@ theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
 
 @[to_additive]
 instance [SMul M N] [∀ i, IsScalarTower M N (α i)] : IsScalarTower M N (Σi, α i) :=
-  ⟨fun a b x => by
-    cases x
-    rw [smul_mk, smul_mk, smul_mk, smul_assoc]⟩
+  ⟨fun a b x => by cases x; rw [smul_mk, smul_mk, smul_mk, smul_assoc]⟩
 
 @[to_additive]
 instance [∀ i, SMulCommClass M N (α i)] : SMulCommClass M N (Σi, α i) :=
-  ⟨fun a b x => by
-    cases x
-    rw [smul_mk, smul_mk, smul_mk, smul_mk, smul_comm]⟩
+  ⟨fun a b x => by cases x; rw [smul_mk, smul_mk, smul_mk, smul_mk, smul_comm]⟩
 
 @[to_additive]
 instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsCentralScalar M (Σi, α i) :=
-  ⟨fun a x => by
-    cases x
-    rw [smul_mk, smul_mk, op_smul_eq_smul]⟩
+  ⟨fun a x => by cases x; rw [smul_mk, smul_mk, op_smul_eq_smul]⟩
 
 /- warning: sigma.has_faithful_smul' -> Sigma.FaithfulSMul' is a dubious translation:
 lean 3 declaration is
@@ -102,12 +96,8 @@ end SMul
 @[to_additive]
 instance {m : Monoid M} [∀ i, MulAction M (α i)] : MulAction M (Σi, α i)
     where
-  mul_smul a b x := by
-    cases x
-    rw [smul_mk, smul_mk, smul_mk, mul_smul]
-  one_smul x := by
-    cases x
-    rw [smul_mk, one_smul]
+  mul_smul a b x := by cases x; rw [smul_mk, smul_mk, smul_mk, mul_smul]
+  one_smul x := by cases x; rw [smul_mk, one_smul]
 
 end Sigma

448144f7

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

f1a2caaf

chore: Replace (· op ·) a by (a op ·) (#8843)

I used the regex $\(· (.) ·$ (.)\), replacing with ($2 $1 ·).

d14658b4

Diff

@@ -30,10 +30,10 @@ variable [∀ i, SMul M (α i)] [∀ i, SMul N (α i)] (a : M) (i : ι) (b : α
 
 @[to_additive Sigma.VAdd]
 instance : SMul M (Σi, α i) :=
-  ⟨fun a => (Sigma.map id) fun _ => (· • ·) a⟩
+  ⟨fun a => (Sigma.map id) fun _ => (a • ·)⟩
 
 @[to_additive]
-theorem smul_def : a • x = x.map id fun _ => (· • ·) a :=
+theorem smul_def : a • x = x.map id fun _ => (a • ·) :=
   rfl
 #align sigma.smul_def Sigma.smul_def
 #align sigma.vadd_def Sigma.vadd_def

f1a2caaf

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

@@ -20,7 +20,7 @@ This file defines instances for arbitrary sum of additive and multiplicative act
 -/
 
 
-variable {ι : Type _} {M N : Type _} {α : ι → Type _}
+variable {ι : Type*} {M N : Type*} {α : ι → Type*}
 
 namespace Sigma

f1a2caaf

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

@@ -2,14 +2,11 @@
 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 group_theory.group_action.sigma
-! leanprover-community/mathlib commit f1a2caaf51ef593799107fe9a8d5e411599f3996
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.GroupTheory.GroupAction.Defs
 
+#align_import group_theory.group_action.sigma from "leanprover-community/mathlib"@"f1a2caaf51ef593799107fe9a8d5e411599f3996"
+
 /-!
 # Sigma instances for additive and multiplicative actions

f1a2caaf

chore: add #align statements for to_additive decls (#1816)

Co-authored-by: Floris van Doorn <fpvdoorn@gmail.com>

ed378238

Diff

@@ -39,11 +39,13 @@ instance : SMul M (Σi, α i) :=
 theorem smul_def : a • x = x.map id fun _ => (· • ·) a :=
   rfl
 #align sigma.smul_def Sigma.smul_def
+#align sigma.vadd_def Sigma.vadd_def
 
 @[to_additive (attr := simp)]
 theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
   rfl
 #align sigma.smul_mk Sigma.smul_mk
+#align sigma.vadd_mk Sigma.vadd_mk
 
 @[to_additive]
 instance [SMul M N] [∀ i, IsScalarTower M N (α i)] : IsScalarTower M N (Σi, α i) :=
@@ -68,6 +70,7 @@ instance [∀ i, SMul Mᵐᵒᵖ (α i)] [∀ i, IsCentralScalar M (α i)] : IsC
 protected theorem FaithfulSMul' [FaithfulSMul M (α i)] : FaithfulSMul M (Σi, α i) :=
   ⟨fun h => eq_of_smul_eq_smul fun a : α i => heq_iff_eq.1 (ext_iff.1 <| h <| mk i a).2⟩
 #align sigma.has_faithful_smul' Sigma.FaithfulSMul'
+#align sigma.has_faithful_vadd' Sigma.FaithfulVAdd'
 
 @[to_additive]
 instance [Nonempty ι] [∀ i, FaithfulSMul M (α i)] : FaithfulSMul M (Σi, α i) :=

f1a2caaf

feat: improve the way to_additive deals with attributes (#1314)

The new syntax for any attributes that need to be copied by to_additive is @[to_additive (attrs := simp, ext, simps)]
Adds the auxiliary declarations generated by the simp and simps attributes to the to_additive-dictionary.
Future issue: Does not yet translate auxiliary declarations for other attributes (including custom simp-attributes). In particular it's possible that norm_cast might generate some auxiliary declarations.
Fixes #950
Fixes #953
Fixes #1149
This moves the interaction between to_additive and simps from the Simps file to the toAdditive file for uniformity.
Make the same changes to @[reassoc]

Co-authored-by: Johan Commelin <johan@commelin.net> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

56bf4cd6

Diff

@@ -40,7 +40,7 @@ theorem smul_def : a • x = x.map id fun _ => (· • ·) a :=
   rfl
 #align sigma.smul_def Sigma.smul_def
 
-@[simp, to_additive]
+@[to_additive (attr := simp)]
 theorem smul_mk : a • mk i b = ⟨i, a • b⟩ :=
   rfl
 #align sigma.smul_mk Sigma.smul_mk

f1a2caaf

chore: add source headers to ported theory files (#1094)

The script used to do this is included. The yaml file was obtained from https://raw.githubusercontent.com/wiki/leanprover-community/mathlib/mathlib4-port-status.md

f168625e

Diff

@@ -2,6 +2,11 @@
 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 group_theory.group_action.sigma
+! leanprover-community/mathlib commit f1a2caaf51ef593799107fe9a8d5e411599f3996
+! Please do not edit these lines, except to modify the commit id
+! if you have ported upstream changes.
 -/
 import Mathlib.GroupTheory.GroupAction.Defs

`group_theory.group_action.sigma` ⟷ `Mathlib.GroupTheory.GroupAction.Sigma`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 32

group_theory.group_action.sigma ⟷ Mathlib.GroupTheory.GroupAction.Sigma

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 32

`group_theory.group_action.sigma` ⟷ `Mathlib.GroupTheory.GroupAction.Sigma`