algebra.lie.universal_enveloping | 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

32b08ef8

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

6b31d1ee

bump to nightly-2024-03-17-08

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

22f01ce4

Diff

@@ -91,7 +91,7 @@ def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
     map_lie' := fun x y =>
       by
       suffices mk_alg_hom R L (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) = mk_alg_hom R L (ιₜ x * ιₜ y) by
-        rw [AlgHom.map_mul] at this ; simp [LieRing.of_associative_ring_bracket, ← this]
+        rw [AlgHom.map_mul] at this; simp [LieRing.of_associative_ring_bracket, ← this]
       exact RingQuot.mkAlgHom_rel _ (rel.lie_compat x y) }
 #align universal_enveloping_algebra.ι UniversalEnvelopingAlgebra.ι
 -/

6b31d1ee

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) 2020 Oliver Nash. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Oliver Nash
 -/
-import Mathbin.Algebra.Lie.OfAssociative
-import Mathbin.Algebra.RingQuot
-import Mathbin.LinearAlgebra.TensorAlgebra.Basic
+import Algebra.Lie.OfAssociative
+import Algebra.RingQuot
+import LinearAlgebra.TensorAlgebra.Basic
 
 #align_import algebra.lie.universal_enveloping from "leanprover-community/mathlib"@"6b31d1eebd64eab86d5bd9936bfaada6ca8b5842"

6b31d1ee

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) 2020 Oliver Nash. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Oliver Nash
-
-! This file was ported from Lean 3 source module algebra.lie.universal_enveloping
-! leanprover-community/mathlib commit 6b31d1eebd64eab86d5bd9936bfaada6ca8b5842
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Algebra.Lie.OfAssociative
 import Mathbin.Algebra.RingQuot
 import Mathbin.LinearAlgebra.TensorAlgebra.Basic
 
+#align_import algebra.lie.universal_enveloping from "leanprover-community/mathlib"@"6b31d1eebd64eab86d5bd9936bfaada6ca8b5842"
+
 /-!
 # Universal enveloping algebra

6b31d1ee

bump to nightly-2023-06-19-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/2a0ce625dbb0ffbc7d1316597de0b25c1ec75303

bbb90f4e

Diff

@@ -115,14 +115,14 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
   invFun F := (F : UniversalEnvelopingAlgebra R L →ₗ⁅R⁆ A).comp (ι R)
   left_inv f := by ext;
     simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
-      LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_to_lieHom,
+      LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_toLieHom,
       LieHom.coe_mk, Function.comp_apply, AlgHom.toLinearMap_apply,
       RingQuot.liftAlgHom_mkAlgHom_apply]
   right_inv F := by ext;
     simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
       LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
       AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
-      RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_to_lieHom, LieHom.coe_mk]
+      RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_toLieHom, LieHom.coe_mk]
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift
 -/

6b31d1ee

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -48,7 +48,6 @@ variable (R : Type u₁) (L : Type u₂)
 
 variable [CommRing R] [LieRing L] [LieAlgebra R L]
 
--- mathport name: exprιₜ
 local notation "ιₜ" => TensorAlgebra.ι R
 
 namespace UniversalEnvelopingAlgebra
@@ -78,14 +77,17 @@ deriving Inhabited, Ring,
 
 namespace UniversalEnvelopingAlgebra
 
+#print UniversalEnvelopingAlgebra.mkAlgHom /-
 /-- The quotient map from the tensor algebra to the universal enveloping algebra as a morphism of
 associative algebras. -/
 def mkAlgHom : TensorAlgebra R L →ₐ[R] UniversalEnvelopingAlgebra R L :=
   RingQuot.mkAlgHom R (Rel R L)
 #align universal_enveloping_algebra.mk_alg_hom UniversalEnvelopingAlgebra.mkAlgHom
+-/
 
 variable {L}
 
+#print UniversalEnvelopingAlgebra.ι /-
 /-- The natural Lie algebra morphism from a Lie algebra to its universal enveloping algebra. -/
 def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
   { (mkAlgHom R L).toLinearMap.comp ιₜ with
@@ -95,9 +97,11 @@ def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
         rw [AlgHom.map_mul] at this ; simp [LieRing.of_associative_ring_bracket, ← this]
       exact RingQuot.mkAlgHom_rel _ (rel.lie_compat x y) }
 #align universal_enveloping_algebra.ι UniversalEnvelopingAlgebra.ι
+-/
 
 variable {A : Type u₃} [Ring A] [Algebra R A] (f : L →ₗ⁅R⁆ A)
 
+#print UniversalEnvelopingAlgebra.lift /-
 /-- The universal property of the universal enveloping algebra: Lie algebra morphisms into
 associative algebras lift to associative algebra morphisms from the universal enveloping algebra. -/
 def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
@@ -120,29 +124,39 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
       AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
       RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_to_lieHom, LieHom.coe_mk]
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift
+-/
 
+#print UniversalEnvelopingAlgebra.lift_symm_apply /-
 @[simp]
 theorem lift_symm_apply (F : UniversalEnvelopingAlgebra R L →ₐ[R] A) :
     (lift R).symm F = (F : UniversalEnvelopingAlgebra R L →ₗ⁅R⁆ A).comp (ι R) :=
   rfl
 #align universal_enveloping_algebra.lift_symm_apply UniversalEnvelopingAlgebra.lift_symm_apply
+-/
 
+#print UniversalEnvelopingAlgebra.ι_comp_lift /-
 @[simp]
 theorem ι_comp_lift : lift R f ∘ ι R = f :=
   funext <| LieHom.ext_iff.mp <| (lift R).symm_apply_apply f
 #align universal_enveloping_algebra.ι_comp_lift UniversalEnvelopingAlgebra.ι_comp_lift
+-/
 
+#print UniversalEnvelopingAlgebra.lift_ι_apply /-
 @[simp]
 theorem lift_ι_apply (x : L) : lift R f (ι R x) = f x := by
   rw [← Function.comp_apply (lift R f) (ι R) x, ι_comp_lift]
 #align universal_enveloping_algebra.lift_ι_apply UniversalEnvelopingAlgebra.lift_ι_apply
+-/
 
+#print UniversalEnvelopingAlgebra.lift_unique /-
 theorem lift_unique (g : UniversalEnvelopingAlgebra R L →ₐ[R] A) : g ∘ ι R = f ↔ g = lift R f :=
   by
   refine' Iff.trans _ (lift R).symm_apply_eq
   constructor <;> · intro h; ext; simp [← h]
 #align universal_enveloping_algebra.lift_unique UniversalEnvelopingAlgebra.lift_unique
+-/
 
+#print UniversalEnvelopingAlgebra.hom_ext /-
 /-- See note [partially-applied ext lemmas]. -/
 @[ext]
 theorem hom_ext {g₁ g₂ : UniversalEnvelopingAlgebra R L →ₐ[R] A}
@@ -153,6 +167,7 @@ theorem hom_ext {g₁ g₂ : UniversalEnvelopingAlgebra R L →ₐ[R] A}
   have h' : (lift R).symm g₁ = (lift R).symm g₂ := by ext; simp [h]
   (lift R).symm.Injective h'
 #align universal_enveloping_algebra.hom_ext UniversalEnvelopingAlgebra.hom_ext
+-/
 
 end UniversalEnvelopingAlgebra

6b31d1ee

bump to nightly-2023-06-10-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/a3e83f0fa4391c8740f7d773a7a9b74e311ae2a3

e13a28eb

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Oliver Nash
 
 ! This file was ported from Lean 3 source module algebra.lie.universal_enveloping
-! leanprover-community/mathlib commit 32b08ef840dd25ca2e47e035c5da03ce16d2dc3c
+! leanprover-community/mathlib commit 6b31d1eebd64eab86d5bd9936bfaada6ca8b5842
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -15,6 +15,9 @@ import Mathbin.LinearAlgebra.TensorAlgebra.Basic
 /-!
 # Universal enveloping algebra
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 Given a commutative ring `R` and a Lie algebra `L` over `R`, we construct the universal
 enveloping algebra of `L`, together with its universal property.

32b08ef8

bump to nightly-2023-06-08-11

mathlib commit https://github.com/leanprover-community/mathlib/commit/31c24aa72e7b3e5ed97a8412470e904f82b81004

7d7c0aca

Diff

@@ -50,6 +50,7 @@ local notation "ιₜ" => TensorAlgebra.ι R
 
 namespace UniversalEnvelopingAlgebra
 
+#print UniversalEnvelopingAlgebra.Rel /-
 /-- The quotient by the ideal generated by this relation is the universal enveloping algebra.
 
 Note that we have avoided using the more natural expression:
@@ -58,16 +59,19 @@ so that our construction needs only the semiring structure of the tensor algebra
 inductive Rel : TensorAlgebra R L → TensorAlgebra R L → Prop
   | lie_compat (x y : L) : Rel (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) (ιₜ x * ιₜ y)
 #align universal_enveloping_algebra.rel UniversalEnvelopingAlgebra.Rel
+-/
 
 end UniversalEnvelopingAlgebra
 
 /- ./././Mathport/Syntax/Translate/Command.lean:43:9: unsupported derive handler algebra[algebra] R -/
+#print UniversalEnvelopingAlgebra /-
 /-- The universal enveloping algebra of a Lie algebra. -/
 def UniversalEnvelopingAlgebra :=
   RingQuot (UniversalEnvelopingAlgebra.Rel R L)
 deriving Inhabited, Ring,
   «./././Mathport/Syntax/Translate/Command.lean:43:9: unsupported derive handler algebra[algebra] R»
 #align universal_enveloping_algebra UniversalEnvelopingAlgebra
+-/
 
 namespace UniversalEnvelopingAlgebra

32b08ef8

bump to nightly-2023-06-04-18

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

3fb4268b

Diff

@@ -61,12 +61,12 @@ inductive Rel : TensorAlgebra R L → TensorAlgebra R L → Prop
 
 end UniversalEnvelopingAlgebra
 
-/- ./././Mathport/Syntax/Translate/Command.lean:42:9: unsupported derive handler algebra[algebra] R -/
+/- ./././Mathport/Syntax/Translate/Command.lean:43:9: unsupported derive handler algebra[algebra] R -/
 /-- The universal enveloping algebra of a Lie algebra. -/
 def UniversalEnvelopingAlgebra :=
   RingQuot (UniversalEnvelopingAlgebra.Rel R L)
 deriving Inhabited, Ring,
-  «./././Mathport/Syntax/Translate/Command.lean:42:9: unsupported derive handler algebra[algebra] R»
+  «./././Mathport/Syntax/Translate/Command.lean:43:9: unsupported derive handler algebra[algebra] R»
 #align universal_enveloping_algebra UniversalEnvelopingAlgebra
 
 namespace UniversalEnvelopingAlgebra

32b08ef8

bump to nightly-2023-06-01-16

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

b9c87c70

Diff

@@ -64,7 +64,8 @@ end UniversalEnvelopingAlgebra
 /- ./././Mathport/Syntax/Translate/Command.lean:42:9: unsupported derive handler algebra[algebra] R -/
 /-- The universal enveloping algebra of a Lie algebra. -/
 def UniversalEnvelopingAlgebra :=
-  RingQuot (UniversalEnvelopingAlgebra.Rel R L)deriving Inhabited, Ring,
+  RingQuot (UniversalEnvelopingAlgebra.Rel R L)
+deriving Inhabited, Ring,
   «./././Mathport/Syntax/Translate/Command.lean:42:9: unsupported derive handler algebra[algebra] R»
 #align universal_enveloping_algebra UniversalEnvelopingAlgebra
 
@@ -84,7 +85,7 @@ def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
     map_lie' := fun x y =>
       by
       suffices mk_alg_hom R L (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) = mk_alg_hom R L (ιₜ x * ιₜ y) by
-        rw [AlgHom.map_mul] at this; simp [LieRing.of_associative_ring_bracket, ← this]
+        rw [AlgHom.map_mul] at this ; simp [LieRing.of_associative_ring_bracket, ← this]
       exact RingQuot.mkAlgHom_rel _ (rel.lie_compat x y) }
 #align universal_enveloping_algebra.ι UniversalEnvelopingAlgebra.ι

32b08ef8

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -83,10 +83,8 @@ def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
   { (mkAlgHom R L).toLinearMap.comp ιₜ with
     map_lie' := fun x y =>
       by
-      suffices mk_alg_hom R L (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) = mk_alg_hom R L (ιₜ x * ιₜ y)
-        by
-        rw [AlgHom.map_mul] at this
-        simp [LieRing.of_associative_ring_bracket, ← this]
+      suffices mk_alg_hom R L (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) = mk_alg_hom R L (ιₜ x * ιₜ y) by
+        rw [AlgHom.map_mul] at this; simp [LieRing.of_associative_ring_bracket, ← this]
       exact RingQuot.mkAlgHom_rel _ (rel.lie_compat x y) }
 #align universal_enveloping_algebra.ι UniversalEnvelopingAlgebra.ι
 
@@ -103,14 +101,12 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
         simp only [LieRing.of_associative_ring_bracket, map_add, TensorAlgebra.lift_ι_apply,
           LieHom.coe_toLinearMap, LieHom.map_lie, map_mul, sub_add_cancel]⟩
   invFun F := (F : UniversalEnvelopingAlgebra R L →ₗ⁅R⁆ A).comp (ι R)
-  left_inv f := by
-    ext
+  left_inv f := by ext;
     simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
       LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_to_lieHom,
       LieHom.coe_mk, Function.comp_apply, AlgHom.toLinearMap_apply,
       RingQuot.liftAlgHom_mkAlgHom_apply]
-  right_inv F := by
-    ext
+  right_inv F := by ext;
     simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
       LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
       AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
@@ -136,10 +132,7 @@ theorem lift_ι_apply (x : L) : lift R f (ι R x) = f x := by
 theorem lift_unique (g : UniversalEnvelopingAlgebra R L →ₐ[R] A) : g ∘ ι R = f ↔ g = lift R f :=
   by
   refine' Iff.trans _ (lift R).symm_apply_eq
-  constructor <;>
-    · intro h
-      ext
-      simp [← h]
+  constructor <;> · intro h; ext; simp [← h]
 #align universal_enveloping_algebra.lift_unique UniversalEnvelopingAlgebra.lift_unique
 
 /-- See note [partially-applied ext lemmas]. -/

32b08ef8

bump to nightly-2023-02-27-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/eb0cb4511aaef0da2462207b67358a0e1fe1e2ee

feafc24f

Diff

@@ -101,17 +101,17 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
       ⟨TensorAlgebra.lift R (f : L →ₗ[R] A), by
         intro a b h; induction' h with x y
         simp only [LieRing.of_associative_ring_bracket, map_add, TensorAlgebra.lift_ι_apply,
-          LieHom.coe_to_linearMap, LieHom.map_lie, map_mul, sub_add_cancel]⟩
+          LieHom.coe_toLinearMap, LieHom.map_lie, map_mul, sub_add_cancel]⟩
   invFun F := (F : UniversalEnvelopingAlgebra R L →ₗ⁅R⁆ A).comp (ι R)
   left_inv f := by
     ext
-    simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_to_linearMap,
+    simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
       LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_to_lieHom,
       LieHom.coe_mk, Function.comp_apply, AlgHom.toLinearMap_apply,
       RingQuot.liftAlgHom_mkAlgHom_apply]
   right_inv F := by
     ext
-    simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_to_linearMap,
+    simp only [ι, mk_alg_hom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
       LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
       AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
       RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_to_lieHom, LieHom.coe_mk]

32b08ef8

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

32b08ef8

chore: classify new definition porting notes (#11512)

Classifies by adding issue number #11446 to porting notes claiming "added definition".

5dc8b362

Diff

@@ -88,7 +88,7 @@ def mkAlgHom : TensorAlgebra R L →ₐ[R] UniversalEnvelopingAlgebra R L :=
 variable {L}
 
 /-- The natural Lie algebra morphism from a Lie algebra to its universal enveloping algebra. -/
-@[simps!] -- Porting note: added
+@[simps!] -- Porting note (#11445): added
 def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
   { (mkAlgHom R L).toLinearMap.comp ιₜ with
     map_lie' := fun {x y} => by

32b08ef8

chore(*): remove empty lines between variable statements (#11418)

Empty lines were removed by executing the following Python script twice

import os
import re


# Loop through each file in the repository
for dir_path, dirs, files in os.walk('.'):
  for filename in files:
    if filename.endswith('.lean'):
      file_path = os.path.join(dir_path, filename)

      # Open the file and read its contents
      with open(file_path, 'r') as file:
        content = file.read()

      # Use a regular expression to replace sequences of "variable" lines separated by empty lines
      # with sequences without empty lines
      modified_content = re.sub(r'(variable.*\n)\n(variable(?! .* in))', r'\1\2', content)

      # Write the modified content back to the file
      with open(file_path, 'w') as file:
        file.write(modified_content)

75c86f04

Diff

@@ -39,7 +39,6 @@ lie algebra, universal enveloping algebra, tensor algebra
 universe u₁ u₂ u₃
 
 variable (R : Type u₁) (L : Type u₂)
-
 variable [CommRing R] [LieRing L] [LieAlgebra R L]
 
 local notation "ιₜ" => TensorAlgebra.ι R

32b08ef8

Revert "chore: revert #7703 (#7710)"

This reverts commit f3695eb2.

ab56fa28

Diff

@@ -119,7 +119,8 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [LieHom.coe_comp, Function.comp_apply, AlgHom.coe_toLieHom,
       UniversalEnvelopingAlgebra.ι_apply, mkAlgHom]
-    rw [RingQuot.liftAlgHom_mkAlgHom_apply]
+    -- This used to be `rw`, but we need `erw` after leanprover/lean4#2644
+    erw [RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap]
   right_inv F := by
     apply RingQuot.ringQuot_ext'
@@ -129,7 +130,8 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
     --   AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
     --   RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_toLieHom, LieHom.coe_mk]
-    simp [mkAlgHom]
+    -- extra `rfl` after leanprover/lean4#2644
+    simp [mkAlgHom]; rfl
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift
 
 @[simp]

32b08ef8

chore: revert #7703 (#7710)

This reverts commit 26eb2b0a.

f3695eb2

Diff

@@ -119,8 +119,7 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [LieHom.coe_comp, Function.comp_apply, AlgHom.coe_toLieHom,
       UniversalEnvelopingAlgebra.ι_apply, mkAlgHom]
-    -- This used to be `rw`, but we need `erw` after leanprover/lean4#2644
-    erw [RingQuot.liftAlgHom_mkAlgHom_apply]
+    rw [RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap]
   right_inv F := by
     apply RingQuot.ringQuot_ext'
@@ -130,8 +129,7 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
     --   AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
     --   RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_toLieHom, LieHom.coe_mk]
-    -- extra `rfl` after leanprover/lean4#2644
-    simp [mkAlgHom]; rfl
+    simp [mkAlgHom]
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift
 
 @[simp]

32b08ef8

chore: bump toolchain to v4.2.0-rc2 (#7703)

This includes all the changes from #7606.

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

26eb2b0a

Diff

@@ -119,7 +119,8 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [LieHom.coe_comp, Function.comp_apply, AlgHom.coe_toLieHom,
       UniversalEnvelopingAlgebra.ι_apply, mkAlgHom]
-    rw [RingQuot.liftAlgHom_mkAlgHom_apply]
+    -- This used to be `rw`, but we need `erw` after leanprover/lean4#2644
+    erw [RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap]
   right_inv F := by
     apply RingQuot.ringQuot_ext'
@@ -129,7 +130,8 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
     --   AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
     --   RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_toLieHom, LieHom.coe_mk]
-    simp [mkAlgHom]
+    -- extra `rfl` after leanprover/lean4#2644
+    simp [mkAlgHom]; rfl
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift
 
 @[simp]

32b08ef8

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) 2020 Oliver Nash. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Oliver Nash
-
-! This file was ported from Lean 3 source module algebra.lie.universal_enveloping
-! leanprover-community/mathlib commit 32b08ef840dd25ca2e47e035c5da03ce16d2dc3c
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Algebra.Lie.OfAssociative
 import Mathlib.Algebra.RingQuot
 import Mathlib.LinearAlgebra.TensorAlgebra.Basic
 
+#align_import algebra.lie.universal_enveloping from "leanprover-community/mathlib"@"32b08ef840dd25ca2e47e035c5da03ce16d2dc3c"
+
 /-!
 # Universal enveloping algebra

32b08ef8

chore: tidy various files (#5233)

697ac1d3

Diff

@@ -45,7 +45,6 @@ variable (R : Type u₁) (L : Type u₂)
 
 variable [CommRing R] [LieRing L] [LieAlgebra R L]
 
--- mathport name: exprιₜ
 local notation "ιₜ" => TensorAlgebra.ι R
 
 namespace UniversalEnvelopingAlgebra
@@ -68,7 +67,8 @@ def UniversalEnvelopingAlgebra :=
 
 namespace UniversalEnvelopingAlgebra
 
--- Porting note: the next three instances were derived automatically in mathlib3.
+-- Porting note(https://github.com/leanprover-community/mathlib4/issues/5020): the next three
+-- instances were derived automatically in mathlib3.
 
 instance instInhabited : Inhabited (UniversalEnvelopingAlgebra R L) :=
   inferInstanceAs (Inhabited (RingQuot (UniversalEnvelopingAlgebra.Rel R L)))
@@ -97,7 +97,7 @@ def ι : L →ₗ⁅R⁆ UniversalEnvelopingAlgebra R L :=
   { (mkAlgHom R L).toLinearMap.comp ιₜ with
     map_lie' := fun {x y} => by
       suffices mkAlgHom R L (ιₜ ⁅x, y⁆ + ιₜ y * ιₜ x) = mkAlgHom R L (ιₜ x * ιₜ y) by
-        rw [AlgHom.map_mul] at this ; simp [LieRing.of_associative_ring_bracket, ← this]
+        rw [AlgHom.map_mul] at this; simp [LieRing.of_associative_ring_bracket, ← this]
       exact RingQuot.mkAlgHom_rel _ (Rel.lie_compat x y) }
 #align universal_enveloping_algebra.ι UniversalEnvelopingAlgebra.ι
 
@@ -117,10 +117,10 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     ext
     -- Porting note: was
     -- simp only [ι, mkAlgHom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
-    --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_to_lieHom,
+    --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_comp, AlgHom.coe_toLieHom,
     --   LieHom.coe_mk, Function.comp_apply, AlgHom.toLinearMap_apply,
     --   RingQuot.liftAlgHom_mkAlgHom_apply]
-    simp only [LieHom.coe_comp, Function.comp_apply, AlgHom.coe_to_lieHom,
+    simp only [LieHom.coe_comp, Function.comp_apply, AlgHom.coe_toLieHom,
       UniversalEnvelopingAlgebra.ι_apply, mkAlgHom]
     rw [RingQuot.liftAlgHom_mkAlgHom_apply]
     simp only [TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap]
@@ -131,7 +131,7 @@ def lift : (L →ₗ⁅R⁆ A) ≃ (UniversalEnvelopingAlgebra R L →ₐ[R] A)
     -- simp only [ι, mkAlgHom, TensorAlgebra.lift_ι_apply, LieHom.coe_toLinearMap,
     --   LinearMap.toFun_eq_coe, LinearMap.coe_comp, LieHom.coe_linearMap_comp,
     --   AlgHom.comp_toLinearMap, Function.comp_apply, AlgHom.toLinearMap_apply,
-    --   RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_to_lieHom, LieHom.coe_mk]
+    --   RingQuot.liftAlgHom_mkAlgHom_apply, AlgHom.coe_toLieHom, LieHom.coe_mk]
     simp [mkAlgHom]
 #align universal_enveloping_algebra.lift UniversalEnvelopingAlgebra.lift

32b08ef8

feat: port Algebra.Lie.UniversalEnveloping (#4827)

4c891470

`algebra.lie.universal_enveloping` ⟷ `Mathlib.Algebra.Lie.UniversalEnveloping`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 479

algebra.lie.universal_enveloping ⟷ Mathlib.Algebra.Lie.UniversalEnveloping

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 479

`algebra.lie.universal_enveloping` ⟷ `Mathlib.Algebra.Lie.UniversalEnveloping`