ring_theory.ring_hom.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

b5aecf07

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

8af7091a

bump to nightly-2024-02-01-06

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

5433bded

Diff

@@ -43,6 +43,12 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
   by
   refine' stable_under_base_change.mk _ finite_respects_iso _
   classical
+  introv h
+  skip
+  replace h : Module.Finite R T := by convert h; ext; rw [Algebra.smul_def]; rfl
+  suffices Module.Finite S (S ⊗[R] T) by change Module.Finite _ _; convert this; ext;
+    rw [Algebra.smul_def]; rfl
+  exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange
 -/

8af7091a

bump to nightly-2024-01-31-06

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

61100fe9

Diff

@@ -43,12 +43,6 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
   by
   refine' stable_under_base_change.mk _ finite_respects_iso _
   classical
-  introv h
-  skip
-  replace h : Module.Finite R T := by convert h; ext; rw [Algebra.smul_def]; rfl
-  suffices Module.Finite S (S ⊗[R] T) by change Module.Finite _ _; convert this; ext;
-    rw [Algebra.smul_def]; rfl
-  exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange
 -/

8af7091a

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) 2021 Andrew Yang. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Andrew Yang
 -/
-import Mathbin.RingTheory.RingHomProperties
+import RingTheory.RingHomProperties
 
 #align_import ring_theory.ring_hom.finite from "leanprover-community/mathlib"@"8af7091a43227e179939ba132e54e54e9f3b089a"

8af7091a

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) 2021 Andrew Yang. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Andrew Yang
-
-! This file was ported from Lean 3 source module ring_theory.ring_hom.finite
-! leanprover-community/mathlib commit 8af7091a43227e179939ba132e54e54e9f3b089a
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.RingTheory.RingHomProperties
 
+#align_import ring_theory.ring_hom.finite from "leanprover-community/mathlib"@"8af7091a43227e179939ba132e54e54e9f3b089a"
+
 /-!
 
 # The meta properties of finite ring homomorphisms.

8af7091a

bump to nightly-2023-06-16-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/bf9bbbcf0c1c1ead18280b0d010e417b10abb1b6

39cf1563

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Andrew Yang
 
 ! This file was ported from Lean 3 source module ring_theory.ring_hom.finite
-! leanprover-community/mathlib commit b5aecf07a179c60b6b37c1ac9da952f3b565c785
+! leanprover-community/mathlib commit 8af7091a43227e179939ba132e54e54e9f3b089a
 ! 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.RingHomProperties
 
 # The meta properties of finite ring homomorphisms.
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 -/

b5aecf07

bump to nightly-2023-06-14-05

mathlib commit https://github.com/leanprover-community/mathlib/commit/8efcf8022aac8e01df8d302dcebdbc25d6a886c8

6c112b6f

Diff

@@ -23,17 +23,22 @@ open scoped TensorProduct
 
 open TensorProduct Algebra.TensorProduct
 
+#print RingHom.finite_stableUnderComposition /-
 theorem finite_stableUnderComposition : StableUnderComposition @Finite := by introv R hf hg;
   exact hg.comp hf
 #align ring_hom.finite_stable_under_composition RingHom.finite_stableUnderComposition
+-/
 
+#print RingHom.finite_respectsIso /-
 theorem finite_respectsIso : RespectsIso @Finite :=
   by
   apply finite_stable_under_composition.respects_iso
   intros
   exact Finite.of_surjective _ e.to_equiv.surjective
 #align ring_hom.finite_respects_iso RingHom.finite_respectsIso
+-/
 
+#print RingHom.finite_stableUnderBaseChange /-
 theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
   by
   refine' stable_under_base_change.mk _ finite_respects_iso _
@@ -45,6 +50,7 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
     rw [Algebra.smul_def]; rfl
   exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange
+-/
 
 end RingHom

b5aecf07

bump to nightly-2023-06-04-18

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

3fb4268b

Diff

@@ -38,12 +38,12 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
   by
   refine' stable_under_base_change.mk _ finite_respects_iso _
   classical
-    introv h
-    skip
-    replace h : Module.Finite R T := by convert h; ext; rw [Algebra.smul_def]; rfl
-    suffices Module.Finite S (S ⊗[R] T) by change Module.Finite _ _; convert this; ext;
-      rw [Algebra.smul_def]; rfl
-    exact inferInstance
+  introv h
+  skip
+  replace h : Module.Finite R T := by convert h; ext; rw [Algebra.smul_def]; rfl
+  suffices Module.Finite S (S ⊗[R] T) by change Module.Finite _ _; convert this; ext;
+    rw [Algebra.smul_def]; rfl
+  exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange
 
 end RingHom

b5aecf07

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -19,7 +19,7 @@ import Mathbin.RingTheory.RingHomProperties
 
 namespace RingHom
 
-open TensorProduct
+open scoped TensorProduct
 
 open TensorProduct Algebra.TensorProduct

b5aecf07

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -23,9 +23,7 @@ open TensorProduct
 
 open TensorProduct Algebra.TensorProduct
 
-theorem finite_stableUnderComposition : StableUnderComposition @Finite :=
-  by
-  introv R hf hg
+theorem finite_stableUnderComposition : StableUnderComposition @Finite := by introv R hf hg;
   exact hg.comp hf
 #align ring_hom.finite_stable_under_composition RingHom.finite_stableUnderComposition
 
@@ -42,18 +40,9 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite :=
   classical
     introv h
     skip
-    replace h : Module.Finite R T := by
-      convert h
-      ext
-      rw [Algebra.smul_def]
-      rfl
-    suffices Module.Finite S (S ⊗[R] T)
-      by
-      change Module.Finite _ _
-      convert this
-      ext
-      rw [Algebra.smul_def]
-      rfl
+    replace h : Module.Finite R T := by convert h; ext; rw [Algebra.smul_def]; rfl
+    suffices Module.Finite S (S ⊗[R] T) by change Module.Finite _ _; convert this; ext;
+      rw [Algebra.smul_def]; rfl
     exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange

b5aecf07

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

b5aecf07

chore: remove unused tactics (#11351)

I removed some of the tactics that were not used and are hopefully uncontroversial arising from the linter at #11308.

As the commit messages should convey, the removed tactics are, essentially,

push_cast
norm_cast
congr
norm_num
dsimp
funext
intro
infer_instance

b99084a9

Diff

@@ -36,9 +36,9 @@ theorem finite_stableUnderBaseChange : StableUnderBaseChange @Finite := by
   classical
   introv h
   replace h : Module.Finite R T := by
-    rw [RingHom.Finite] at h; convert h; ext; intros; simp_rw [Algebra.smul_def]; rfl
+    rw [RingHom.Finite] at h; convert h; ext; simp_rw [Algebra.smul_def]; rfl
   suffices Module.Finite S (S ⊗[R] T) by
-    rw [RingHom.Finite]; convert this; congr; ext; intros; simp_rw [Algebra.smul_def]; rfl
+    rw [RingHom.Finite]; convert this; congr; ext; simp_rw [Algebra.smul_def]; rfl
   exact inferInstance
 #align ring_hom.finite_stable_under_base_change RingHom.finite_stableUnderBaseChange

b5aecf07

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) 2021 Andrew Yang. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Andrew Yang
-
-! This file was ported from Lean 3 source module ring_theory.ring_hom.finite
-! leanprover-community/mathlib commit b5aecf07a179c60b6b37c1ac9da952f3b565c785
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.RingTheory.RingHomProperties
 
+#align_import ring_theory.ring_hom.finite from "leanprover-community/mathlib"@"b5aecf07a179c60b6b37c1ac9da952f3b565c785"
+
 /-!
 
 # The meta properties of finite ring homomorphisms.

b5aecf07

feat : port RingTheory.RingHom.Finite (#5013)

af3b54c4

`ring_theory.ring_hom.finite` ⟷ `Mathlib.RingTheory.RingHom.Finite`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 678

ring_theory.ring_hom.finite ⟷ Mathlib.RingTheory.RingHom.Finite

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 678

`ring_theory.ring_hom.finite` ⟷ `Mathlib.RingTheory.RingHom.Finite`