group_theory.commensurable | 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

48085f14

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

e97cf15c

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) 2021 Chris Birkbeck. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Chris Birkbeck
 -/
-import Mathbin.GroupTheory.Index
-import Mathbin.GroupTheory.Subgroup.Pointwise
-import Mathbin.GroupTheory.GroupAction.ConjAct
+import GroupTheory.Index
+import GroupTheory.Subgroup.Pointwise
+import GroupTheory.GroupAction.ConjAct
 
 #align_import group_theory.commensurable from "leanprover-community/mathlib"@"e97cf15cd1aec9bd5c193b2ffac5a6dc9118912b"

e97cf15c

bump to nightly-2023-08-17-09

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

60285dcc

Diff

@@ -113,7 +113,7 @@ def commensurator' (H : Subgroup G) : Subgroup (ConjAct G)
     where
   carrier := {g : ConjAct G | Commensurable (g • H) H}
   one_mem' := by rw [Set.mem_setOf_eq, one_smul]
-  mul_mem' a b ha hb := by
+  hMul_mem' a b ha hb := by
     rw [Set.mem_setOf_eq, mul_smul]
     exact trans ((commensurable_conj a).mp hb) ha
   inv_mem' a ha := by rwa [Set.mem_setOf_eq, comm, ← commensurable_inv]

e97cf15c

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) 2021 Chris Birkbeck. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Chris Birkbeck
-
-! This file was ported from Lean 3 source module group_theory.commensurable
-! leanprover-community/mathlib commit e97cf15cd1aec9bd5c193b2ffac5a6dc9118912b
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.GroupTheory.Index
 import Mathbin.GroupTheory.Subgroup.Pointwise
 import Mathbin.GroupTheory.GroupAction.ConjAct
 
+#align_import group_theory.commensurable from "leanprover-community/mathlib"@"e97cf15cd1aec9bd5c193b2ffac5a6dc9118912b"
+
 /-!
 # Commensurability for subgroups

e97cf15c

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -81,6 +81,7 @@ theorem equivalence : Equivalence (@Commensurable G _) :=
 #align commensurable.equivalence Commensurable.equivalence
 -/
 
+#print Commensurable.quotConjEquiv /-
 /-- Equivalence of `K/H ⊓ K` with `gKg⁻¹/gHg⁻¹ ⊓ gKg⁻¹`-/
 def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     K ⧸ H.subgroupOf K ≃ (g • K).1 ⧸ (g • H).subgroupOf (g • K) :=
@@ -92,16 +93,21 @@ def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
       Subgroup.equivSMul_apply_coe]
     exact subgroup.smul_mem_pointwise_smul_iff.symm
 #align commensurable.quot_conj_equiv Commensurable.quotConjEquiv
+-/
 
+#print Commensurable.commensurable_conj /-
 theorem commensurable_conj {H K : Subgroup G} (g : ConjAct G) :
     Commensurable H K ↔ Commensurable (g • H) (g • K) :=
   and_congr (not_iff_not.mpr (Eq.congr_left (Cardinal.toNat_congr (quotConjEquiv H K g))))
     (not_iff_not.mpr (Eq.congr_left (Cardinal.toNat_congr (quotConjEquiv K H g))))
 #align commensurable.commensurable_conj Commensurable.commensurable_conj
+-/
 
+#print Commensurable.commensurable_inv /-
 theorem commensurable_inv (H : Subgroup G) (g : ConjAct G) :
     Commensurable (g • H) H ↔ Commensurable H (g⁻¹ • H) := by rw [commensurable_conj, inv_smul_smul]
 #align commensurable.commensurable_inv Commensurable.commensurable_inv
+-/
 
 #print Commensurable.commensurator' /-
 /-- For `H` a subgroup of `G`, this is the subgroup of all elements `g : conj_aut G`
@@ -125,17 +131,21 @@ def commensurator (H : Subgroup G) : Subgroup G :=
 #align commensurable.commensurator Commensurable.commensurator
 -/
 
+#print Commensurable.commensurator'_mem_iff /-
 @[simp]
 theorem commensurator'_mem_iff (H : Subgroup G) (g : ConjAct G) :
     g ∈ commensurator' H ↔ Commensurable (g • H) H :=
   Iff.rfl
 #align commensurable.commensurator'_mem_iff Commensurable.commensurator'_mem_iff
+-/
 
+#print Commensurable.commensurator_mem_iff /-
 @[simp]
 theorem commensurator_mem_iff (H : Subgroup G) (g : G) :
     g ∈ commensurator H ↔ Commensurable (ConjAct.toConjAct g • H) H :=
   Iff.rfl
 #align commensurable.commensurator_mem_iff Commensurable.commensurator_mem_iff
+-/
 
 #print Commensurable.eq /-
 theorem eq {H K : Subgroup G} (hk : Commensurable H K) : commensurator H = commensurator K :=

e97cf15c

bump to nightly-2023-06-04-18

mathlib commit https://github.com/leanprover-community/mathlib/commit/5f25c089cb34db4db112556f23c50d12da81b297

3fb4268b

Diff

@@ -108,7 +108,7 @@ theorem commensurable_inv (H : Subgroup G) (g : ConjAct G) :
 such that `commensurable (g • H) H` -/
 def commensurator' (H : Subgroup G) : Subgroup (ConjAct G)
     where
-  carrier := { g : ConjAct G | Commensurable (g • H) H }
+  carrier := {g : ConjAct G | Commensurable (g • H) H}
   one_mem' := by rw [Set.mem_setOf_eq, one_smul]
   mul_mem' a b ha hb := by
     rw [Set.mem_setOf_eq, mul_smul]

e97cf15c

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -46,7 +46,7 @@ def Commensurable (H K : Subgroup G) : Prop :=
 
 namespace Commensurable
 
-open Pointwise
+open scoped Pointwise
 
 #print Commensurable.refl /-
 @[refl]

e97cf15c

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -81,9 +81,6 @@ theorem equivalence : Equivalence (@Commensurable G _) :=
 #align commensurable.equivalence Commensurable.equivalence
 -/
 
-/- warning: commensurable.quot_conj_equiv -> Commensurable.quotConjEquiv is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align commensurable.quot_conj_equiv Commensurable.quotConjEquivₓ'. -/
 /-- Equivalence of `K/H ⊓ K` with `gKg⁻¹/gHg⁻¹ ⊓ gKg⁻¹`-/
 def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     K ⧸ H.subgroupOf K ≃ (g • K).1 ⧸ (g • H).subgroupOf (g • K) :=
@@ -96,24 +93,12 @@ def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     exact subgroup.smul_mem_pointwise_smul_iff.symm
 #align commensurable.quot_conj_equiv Commensurable.quotConjEquiv
 
-/- warning: commensurable.commensurable_conj -> Commensurable.commensurable_conj is a dubious translation:
-lean 3 declaration is
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] {H : Subgroup.{u1} G _inst_1} {K : Subgroup.{u1} G _inst_1} (g : ConjAct.{u1} G), Iff (Commensurable.{u1} G _inst_1 H K) (Commensurable.{u1} G _inst_1 (SMul.smul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toHasSmul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.mulDistribMulAction.{u1} G _inst_1))) g H) (SMul.smul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toHasSmul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.mulDistribMulAction.{u1} G _inst_1))) g K))
-but is expected to have type
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] {H : Subgroup.{u1} G _inst_1} {K : Subgroup.{u1} G _inst_1} (g : ConjAct.{u1} G), Iff (Commensurable.{u1} G _inst_1 H K) (Commensurable.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g H) (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K))
-Case conversion may be inaccurate. Consider using '#align commensurable.commensurable_conj Commensurable.commensurable_conjₓ'. -/
 theorem commensurable_conj {H K : Subgroup G} (g : ConjAct G) :
     Commensurable H K ↔ Commensurable (g • H) (g • K) :=
   and_congr (not_iff_not.mpr (Eq.congr_left (Cardinal.toNat_congr (quotConjEquiv H K g))))
     (not_iff_not.mpr (Eq.congr_left (Cardinal.toNat_congr (quotConjEquiv K H g))))
 #align commensurable.commensurable_conj Commensurable.commensurable_conj
 
-/- warning: commensurable.commensurable_inv -> Commensurable.commensurable_inv is a dubious translation:
-lean 3 declaration is
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] (H : Subgroup.{u1} G _inst_1) (g : ConjAct.{u1} G), Iff (Commensurable.{u1} G _inst_1 (SMul.smul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toHasSmul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.mulDistribMulAction.{u1} G _inst_1))) g H) H) (Commensurable.{u1} G _inst_1 H (SMul.smul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toHasSmul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.mulDistribMulAction.{u1} G _inst_1))) (Inv.inv.{u1} (ConjAct.{u1} G) (DivInvMonoid.toHasInv.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) g) H))
-but is expected to have type
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] (H : Subgroup.{u1} G _inst_1) (g : ConjAct.{u1} G), Iff (Commensurable.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g H) H) (Commensurable.{u1} G _inst_1 H (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) (Inv.inv.{u1} (ConjAct.{u1} G) (InvOneClass.toInv.{u1} (ConjAct.{u1} G) (DivInvOneMonoid.toInvOneClass.{u1} (ConjAct.{u1} G) (DivisionMonoid.toDivInvOneMonoid.{u1} (ConjAct.{u1} G) (Group.toDivisionMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instGroupConjAct.{u1} G _inst_1))))) g) H))
-Case conversion may be inaccurate. Consider using '#align commensurable.commensurable_inv Commensurable.commensurable_invₓ'. -/
 theorem commensurable_inv (H : Subgroup G) (g : ConjAct G) :
     Commensurable (g • H) H ↔ Commensurable H (g⁻¹ • H) := by rw [commensurable_conj, inv_smul_smul]
 #align commensurable.commensurable_inv Commensurable.commensurable_inv
@@ -140,24 +125,12 @@ def commensurator (H : Subgroup G) : Subgroup G :=
 #align commensurable.commensurator Commensurable.commensurator
 -/
 
-/- warning: commensurable.commensurator'_mem_iff -> Commensurable.commensurator'_mem_iff is a dubious translation:
-lean 3 declaration is
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] (H : Subgroup.{u1} G _inst_1) (g : ConjAct.{u1} G), Iff (Membership.Mem.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} (ConjAct.{u1} G) (ConjAct.group.{u1} G _inst_1)) (SetLike.hasMem.{u1, u1} (Subgroup.{u1} (ConjAct.{u1} G) (ConjAct.group.{u1} G _inst_1)) (ConjAct.{u1} G) (Subgroup.setLike.{u1} (ConjAct.{u1} G) (ConjAct.group.{u1} G _inst_1))) g (Commensurable.commensurator'.{u1} G _inst_1 H)) (Commensurable.{u1} G _inst_1 (SMul.smul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toHasSmul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.divInvMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.mulDistribMulAction.{u1} G _inst_1))) g H) H)
-but is expected to have type
-  forall {G : Type.{u1}} [_inst_1 : Group.{u1} G] (H : Subgroup.{u1} G _inst_1) (g : ConjAct.{u1} G), Iff (Membership.mem.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} (ConjAct.{u1} G) (ConjAct.instGroupConjAct.{u1} G _inst_1)) (SetLike.instMembership.{u1, u1} (Subgroup.{u1} (ConjAct.{u1} G) (ConjAct.instGroupConjAct.{u1} G _inst_1)) (ConjAct.{u1} G) (Subgroup.instSetLikeSubgroup.{u1} (ConjAct.{u1} G) (ConjAct.instGroupConjAct.{u1} G _inst_1))) g (Commensurable.commensurator'.{u1} G _inst_1 H)) (Commensurable.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g H) H)
-Case conversion may be inaccurate. Consider using '#align commensurable.commensurator'_mem_iff Commensurable.commensurator'_mem_iffₓ'. -/
 @[simp]
 theorem commensurator'_mem_iff (H : Subgroup G) (g : ConjAct G) :
     g ∈ commensurator' H ↔ Commensurable (g • H) H :=
   Iff.rfl
 #align commensurable.commensurator'_mem_iff Commensurable.commensurator'_mem_iff
 
-/- warning: commensurable.commensurator_mem_iff -> Commensurable.commensurator_mem_iff is a dubious translation:
-lean 3 declaration is
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-Case conversion may be inaccurate. Consider using '#align commensurable.commensurator_mem_iff Commensurable.commensurator_mem_iffₓ'. -/
 @[simp]
 theorem commensurator_mem_iff (H : Subgroup G) (g : G) :
     g ∈ commensurator H ↔ Commensurable (ConjAct.toConjAct g • H) H :=

e97cf15c

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -89,7 +89,7 @@ def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     K ⧸ H.subgroupOf K ≃ (g • K).1 ⧸ (g • H).subgroupOf (g • K) :=
   Quotient.congr (K.equivSMul g).toEquiv fun a b =>
     by
-    dsimp
+    dsimp;
     rw [← Quotient.eq'', ← Quotient.eq'', QuotientGroup.eq', QuotientGroup.eq',
       Subgroup.mem_subgroupOf, Subgroup.mem_subgroupOf, ← MulEquiv.map_inv, ← MulEquiv.map_mul,
       Subgroup.equivSMul_apply_coe]

e97cf15c

bump to nightly-2023-05-28-03

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

6c6011cf

Diff

@@ -82,10 +82,7 @@ theorem equivalence : Equivalence (@Commensurable G _) :=
 -/
 
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(ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K))) (Subgroup.toGroup.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K))) (QuotientGroup.instHasQuotientSubgroup.{u1} (Subtype.{succ u1} G (fun (x : G) => Membership.mem.{u1, u1} G (Subgroup.{u1} G _inst_1) (SetLike.instMembership.{u1, u1} (Subgroup.{u1} G _inst_1) G (Subgroup.instSetLikeSubgroup.{u1} G _inst_1)) x (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K))) (Subgroup.toGroup.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K))) (Subgroup.subgroupOf.{u1} G _inst_1 (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g H) (HSMul.hSMul.{u1, u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (Subgroup.{u1} G _inst_1) (instHSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (MulAction.toSMul.{u1, u1} (ConjAct.{u1} G) (Subgroup.{u1} G _inst_1) (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (Subgroup.pointwiseMulAction.{u1, u1} (ConjAct.{u1} G) G _inst_1 (DivInvMonoid.toMonoid.{u1} (ConjAct.{u1} G) (ConjAct.instDivInvMonoidConjAct.{u1} G (Group.toDivInvMonoid.{u1} G _inst_1))) (ConjAct.instMulDistribMulActionConjActToMonoidInstDivInvMonoidConjActToDivInvMonoid.{u1} G _inst_1)))) g K)))
+<too large>
 Case conversion may be inaccurate. Consider using '#align commensurable.quot_conj_equiv Commensurable.quotConjEquivₓ'. -/
 /-- Equivalence of `K/H ⊓ K` with `gKg⁻¹/gHg⁻¹ ⊓ gKg⁻¹`-/
 def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :

e97cf15c

bump to nightly-2023-03-17-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/da3fc4a33ff6bc75f077f691dc94c217b8d41559

624c906c

Diff

@@ -90,12 +90,12 @@ Case conversion may be inaccurate. Consider using '#align commensurable.quot_con
 /-- Equivalence of `K/H ⊓ K` with `gKg⁻¹/gHg⁻¹ ⊓ gKg⁻¹`-/
 def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     K ⧸ H.subgroupOf K ≃ (g • K).1 ⧸ (g • H).subgroupOf (g • K) :=
-  Quotient.congr (K.equivSmul g).toEquiv fun a b =>
+  Quotient.congr (K.equivSMul g).toEquiv fun a b =>
     by
     dsimp
     rw [← Quotient.eq'', ← Quotient.eq'', QuotientGroup.eq', QuotientGroup.eq',
       Subgroup.mem_subgroupOf, Subgroup.mem_subgroupOf, ← MulEquiv.map_inv, ← MulEquiv.map_mul,
-      Subgroup.equivSmul_apply_coe]
+      Subgroup.equivSMul_apply_coe]
     exact subgroup.smul_mem_pointwise_smul_iff.symm
 #align commensurable.quot_conj_equiv Commensurable.quotConjEquiv

e97cf15c

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

48085f14

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

@@ -29,7 +29,7 @@ the map `G → (conjAct G)` to obtain our commensurator as a subgroup of `G`.
 -/
 
 
-variable {G : Type _} [Group G]
+variable {G : Type*} [Group G]
 
 /-- Two subgroups `H K` of `G` are commensurable if `H ⊓ K` has finite index in both `H` and `K` -/
 def Commensurable (H K : Subgroup G) : Prop :=

48085f14

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) 2021 Chris Birkbeck. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Chris Birkbeck
-
-! This file was ported from Lean 3 source module group_theory.commensurable
-! leanprover-community/mathlib commit 48085f140e684306f9e7da907cd5932056d1aded
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.GroupTheory.Index
 import Mathlib.GroupTheory.Subgroup.Pointwise
 import Mathlib.GroupTheory.GroupAction.ConjAct
 
+#align_import group_theory.commensurable from "leanprover-community/mathlib"@"48085f140e684306f9e7da907cd5932056d1aded"
+
 /-!
 # Commensurability for subgroups

48085f14

chore: cleanup whitespace (#5988)

Grepping for [^ .:{-] [^ :] and reviewing the results. Once I started I couldn't stop. :-)

Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

12343aa5

Diff

@@ -21,7 +21,7 @@ of `G`.
 
 ## Main definitions
 
-* `Commensurable`: defines commensurability for two subgroups `H`, `K` of  `G`
+* `Commensurable`: defines commensurability for two subgroups `H`, `K` of `G`
 * `commensurator`: defines the commensurator of a subgroup `H` of `G`.
 
 ## Implementation details

48085f14

chore: tidy various files (#2950)

f03c405e

Diff

@@ -67,11 +67,11 @@ theorem equivalence : Equivalence (@Commensurable G _) :=
 /-- Equivalence of `K/H ⊓ K` with `gKg⁻¹/gHg⁻¹ ⊓ gKg⁻¹`-/
 def quotConjEquiv (H K : Subgroup G) (g : ConjAct G) :
     K ⧸ H.subgroupOf K ≃ (g • K).1 ⧸ (g • H).subgroupOf (g • K) :=
-  Quotient.congr (K.equivSmul g).toEquiv fun a b => by
+  Quotient.congr (K.equivSMul g).toEquiv fun a b => by
     dsimp
     rw [← Quotient.eq'', ← Quotient.eq'', QuotientGroup.eq', QuotientGroup.eq',
       Subgroup.mem_subgroupOf, Subgroup.mem_subgroupOf, ← MulEquiv.map_inv, ← MulEquiv.map_mul,
-      Subgroup.equivSmul_apply_coe]
+      Subgroup.equivSMul_apply_coe]
     exact Subgroup.smul_mem_pointwise_smul_iff.symm
 #align commensurable.quot_conj_equiv Commensurable.quotConjEquiv
 
@@ -91,7 +91,8 @@ def commensurator' (H : Subgroup G) : Subgroup (ConjAct G) where
   carrier := { g : ConjAct G | Commensurable (g • H) H }
   one_mem' := by rw [Set.mem_setOf_eq, one_smul]
   mul_mem' ha hb := by
-    rw [Set.mem_setOf_eq, mul_smul]; exact trans ((commensurable_conj _).mp hb) ha
+    rw [Set.mem_setOf_eq, mul_smul]
+    exact trans ((commensurable_conj _).mp hb) ha
   inv_mem' _ := by rwa [Set.mem_setOf_eq, comm, ← commensurable_inv]
 #align commensurable.commensurator' Commensurable.commensurator'

48085f14

feat: port GroupTheory.Commensurable (#2293)

5c795927

`group_theory.commensurable` ⟷ `Mathlib.GroupTheory.Commensurable`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 359

group_theory.commensurable ⟷ Mathlib.GroupTheory.Commensurable

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 359

`group_theory.commensurable` ⟷ `Mathlib.GroupTheory.Commensurable`