ring_theory.valuation.ramification_group

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

88b76e4c

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

1b089e3b

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 Michail Karatarakis. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Michail Karatarakis
 -/
-import Mathbin.RingTheory.Ideal.LocalRing
-import Mathbin.RingTheory.Valuation.ValuationSubring
+import RingTheory.Ideal.LocalRing
+import RingTheory.Valuation.ValuationSubring
 
 #align_import ring_theory.valuation.ramification_group from "leanprover-community/mathlib"@"1b089e3bdc3ce6b39cd472543474a0a137128c6c"

1b089e3b

bump to nightly-2023-08-17-09

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

60285dcc

Diff

@@ -56,7 +56,7 @@ instance decompositionSubgroupMulSemiringAction (A : ValuationSubring L) :
     smul_add := fun g k l => Subtype.ext <| smul_add g k l
     smul_zero := fun g => Subtype.ext <| smul_zero g
     smul_one := fun g => Subtype.ext <| smul_one g
-    smul_mul := fun g k l => Subtype.ext <| smul_mul' g k l }
+    smul_hMul := fun g k l => Subtype.ext <| smul_mul' g k l }
 #align valuation_subring.decomposition_subgroup_mul_semiring_action ValuationSubring.decompositionSubgroupMulSemiringAction
 -/

1b089e3b

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 Michail Karatarakis. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Michail Karatarakis
-
-! This file was ported from Lean 3 source module ring_theory.valuation.ramification_group
-! leanprover-community/mathlib commit 1b089e3bdc3ce6b39cd472543474a0a137128c6c
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.RingTheory.Ideal.LocalRing
 import Mathbin.RingTheory.Valuation.ValuationSubring
 
+#align_import ring_theory.valuation.ramification_group from "leanprover-community/mathlib"@"1b089e3bdc3ce6b39cd472543474a0a137128c6c"
+
 /-!
 # Ramification groups

1b089e3b

bump to nightly-2023-06-23-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/d30d31261cdb4d2f5e612eabc3c4bf45556350d5

2dc54ce1

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Michail Karatarakis
 
 ! This file was ported from Lean 3 source module ring_theory.valuation.ramification_group
-! leanprover-community/mathlib commit 88b76e4c78d85d9ac31d991aa05ff22c09da889b
+! leanprover-community/mathlib commit 1b089e3bdc3ce6b39cd472543474a0a137128c6c
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -14,6 +14,9 @@ import Mathbin.RingTheory.Valuation.ValuationSubring
 /-!
 # Ramification groups
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 The decomposition subgroup and inertia subgroups.
 
 TODO: Define higher ramification groups in lower numbering

88b76e4c

bump to nightly-2023-06-22-01

mathlib commit https://github.com/leanprover-community/mathlib/commit/f2ad3645af9effcdb587637dc28a6074edc813f9

be0ed66d

Diff

@@ -26,13 +26,16 @@ open scoped Pointwise
 
 variable (K : Type _) {L : Type _} [Field K] [Field L] [Algebra K L]
 
+#print ValuationSubring.decompositionSubgroup /-
 /-- The decomposition subgroup defined as the stabilizer of the action
 on the type of all valuation subrings of the field. -/
 @[reducible]
 def decompositionSubgroup (A : ValuationSubring L) : Subgroup (L ≃ₐ[K] L) :=
   MulAction.stabilizer (L ≃ₐ[K] L) A
 #align valuation_subring.decomposition_subgroup ValuationSubring.decompositionSubgroup
+-/
 
+#print ValuationSubring.subMulAction /-
 /-- The valuation subring `A` (considered as a subset of `L`)
 is stable under the action of the decomposition group. -/
 def subMulAction (A : ValuationSubring L) : SubMulAction (A.decompositionSubgroup K) L
@@ -40,7 +43,9 @@ def subMulAction (A : ValuationSubring L) : SubMulAction (A.decompositionSubgrou
   carrier := A
   smul_mem' g l h := Set.mem_of_mem_of_subset (Set.smul_mem_smul_set h) g.Prop.le
 #align valuation_subring.sub_mul_action ValuationSubring.subMulAction
+-/
 
+#print ValuationSubring.decompositionSubgroupMulSemiringAction /-
 /-- The multiplicative action of the decomposition subgroup on `A`. -/
 instance decompositionSubgroupMulSemiringAction (A : ValuationSubring L) :
     MulSemiringAction (A.decompositionSubgroup K) A :=
@@ -53,13 +58,16 @@ instance decompositionSubgroupMulSemiringAction (A : ValuationSubring L) :
     smul_one := fun g => Subtype.ext <| smul_one g
     smul_mul := fun g k l => Subtype.ext <| smul_mul' g k l }
 #align valuation_subring.decomposition_subgroup_mul_semiring_action ValuationSubring.decompositionSubgroupMulSemiringAction
+-/
 
+#print ValuationSubring.inertiaSubgroup /-
 /-- The inertia subgroup defined as the kernel of the group homomorphism from
 the decomposition subgroup to the group of automorphisms of the residue field of `A`. -/
 def inertiaSubgroup (A : ValuationSubring L) : Subgroup (A.decompositionSubgroup K) :=
   MonoidHom.ker <|
     MulSemiringAction.toRingAut (A.decompositionSubgroup K) (LocalRing.ResidueField A)
 #align valuation_subring.inertia_subgroup ValuationSubring.inertiaSubgroup
+-/
 
 end ValuationSubring

88b76e4c

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -22,7 +22,7 @@ TODO: Define higher ramification groups in lower numbering
 
 namespace ValuationSubring
 
-open Pointwise
+open scoped Pointwise
 
 variable (K : Type _) {L : Type _} [Field K] [Field L] [Algebra K L]

88b76e4c

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

88b76e4c

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

@@ -21,7 +21,7 @@ namespace ValuationSubring
 
 open scoped Pointwise
 
-variable (K : Type _) {L : Type _} [Field K] [Field L] [Algebra K L]
+variable (K : Type*) {L : Type*} [Field K] [Field L] [Algebra K L]
 
 /-- The decomposition subgroup defined as the stabilizer of the action
 on the type of all valuation subrings of the field. -/

88b76e4c

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 Michail Karatarakis. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Michail Karatarakis
-
-! This file was ported from Lean 3 source module ring_theory.valuation.ramification_group
-! leanprover-community/mathlib commit 88b76e4c78d85d9ac31d991aa05ff22c09da889b
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.RingTheory.Ideal.LocalRing
 import Mathlib.RingTheory.Valuation.ValuationSubring
 
+#align_import ring_theory.valuation.ramification_group from "leanprover-community/mathlib"@"88b76e4c78d85d9ac31d991aa05ff22c09da889b"
+
 /-!
 # Ramification groups

88b76e4c

feat: port RingTheory.Valuation.RamificationGroup (#5351)

ce12efa0

`ring_theory.valuation.ramification_group` ⟷ `Mathlib.RingTheory.Valuation.RamificationGroup`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 11 + 693

ring_theory.valuation.ramification_group ⟷ Mathlib.RingTheory.Valuation.RamificationGroup

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 11 + 693

`ring_theory.valuation.ramification_group` ⟷ `Mathlib.RingTheory.Valuation.RamificationGroup`