algebra.polynomial.group_ring_action | 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

afad8e43

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

10bf4f82

bump to nightly-2024-04-07-08

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

b03b8656

Diff

@@ -5,8 +5,8 @@ Authors: Kenny Lau
 -/
 import Algebra.GroupRingAction.Basic
 import GroupTheory.GroupAction.Hom
-import Data.Polynomial.AlgebraMap
-import Data.Polynomial.Monic
+import Algebra.Polynomial.AlgebraMap
+import Algebra.Polynomial.Monic
 import GroupTheory.GroupAction.Quotient
 
 #align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"10bf4f825ad729c5653adc039dafa3622e7f93c9"

10bf4f82

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
 import Algebra.GroupRingAction.Basic
-import Algebra.Hom.GroupAction
+import GroupTheory.GroupAction.Hom
 import Data.Polynomial.AlgebraMap
 import Data.Polynomial.Monic
 import GroupTheory.GroupAction.Quotient

10bf4f82

bump to nightly-2023-12-20-06

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

058cd493

Diff

@@ -103,40 +103,40 @@ open MulAction
 
 open scoped Classical
 
-#print prodXSubSmul /-
+#print prodXSubSMul /-
 /-- the product of `(X - g • x)` over distinct `g • x`. -/
-noncomputable def prodXSubSmul (x : R) : R[X] :=
+noncomputable def prodXSubSMul (x : R) : R[X] :=
   (Finset.univ : Finset (G ⧸ MulAction.stabilizer G x)).Prod fun g =>
     Polynomial.X - Polynomial.C (ofQuotientStabilizer G x g)
-#align prod_X_sub_smul prodXSubSmul
+#align prod_X_sub_smul prodXSubSMul
 -/
 
-#print prodXSubSmul.monic /-
-theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
+#print prodXSubSMul.monic /-
+theorem prodXSubSMul.monic (x : R) : (prodXSubSMul G R x).Monic :=
   Polynomial.monic_prod_of_monic _ _ fun g _ => Polynomial.monic_X_sub_C _
-#align prod_X_sub_smul.monic prodXSubSmul.monic
+#align prod_X_sub_smul.monic prodXSubSMul.monic
 -/
 
-#print prodXSubSmul.eval /-
-theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
+#print prodXSubSMul.eval /-
+theorem prodXSubSMul.eval (x : R) : (prodXSubSMul G R x).eval x = 0 :=
   (map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
-#align prod_X_sub_smul.eval prodXSubSmul.eval
+#align prod_X_sub_smul.eval prodXSubSMul.eval
 -/
 
-#print prodXSubSmul.smul /-
-theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
+#print prodXSubSMul.smul /-
+theorem prodXSubSMul.smul (x : R) (g : G) : g • prodXSubSMul G R x = prodXSubSMul G R x :=
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' => by
       rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]
-#align prod_X_sub_smul.smul prodXSubSmul.smul
+#align prod_X_sub_smul.smul prodXSubSMul.smul
 -/
 
-#print prodXSubSmul.coeff /-
-theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
-    g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by
-  rw [← Polynomial.coeff_smul, prodXSubSmul.smul]
-#align prod_X_sub_smul.coeff prodXSubSmul.coeff
+#print prodXSubSMul.coeff /-
+theorem prodXSubSMul.coeff (x : R) (g : G) (n : ℕ) :
+    g • (prodXSubSMul G R x).coeff n = (prodXSubSMul G R x).coeff n := by
+  rw [← Polynomial.coeff_smul, prodXSubSMul.smul]
+#align prod_X_sub_smul.coeff prodXSubSMul.coeff
 -/
 
 end CommRing

10bf4f82

bump to nightly-2023-12-06-06

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

d09917f6

Diff

@@ -119,7 +119,7 @@ theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
 
 #print prodXSubSmul.eval /-
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
-  (MonoidHom.map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
+  (map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
 #align prod_X_sub_smul.eval prodXSubSmul.eval
 -/

10bf4f82

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,11 +3,11 @@ Copyright (c) 2020 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
-import Mathbin.Algebra.GroupRingAction.Basic
-import Mathbin.Algebra.Hom.GroupAction
-import Mathbin.Data.Polynomial.AlgebraMap
-import Mathbin.Data.Polynomial.Monic
-import Mathbin.GroupTheory.GroupAction.Quotient
+import Algebra.GroupRingAction.Basic
+import Algebra.Hom.GroupAction
+import Data.Polynomial.AlgebraMap
+import Data.Polynomial.Monic
+import GroupTheory.GroupAction.Quotient
 
 #align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"10bf4f825ad729c5653adc039dafa3622e7f93c9"

10bf4f82

bump to nightly-2023-08-17-09

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

60285dcc

Diff

@@ -52,7 +52,7 @@ noncomputable instance [MulSemiringAction M R] : MulSemiringAction M R[X] :=
     smul := (· • ·)
     smul_one := fun m =>
       (smul_eq_map R m).symm ▸ Polynomial.map_one (MulSemiringAction.toRingHom M R m)
-    smul_mul := fun m p q =>
+    smul_hMul := fun m p q =>
       (smul_eq_map R m).symm ▸ Polynomial.map_mul (MulSemiringAction.toRingHom M R m) }
 
 variable {M R}

10bf4f82

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,11 +2,6 @@
 Copyright (c) 2020 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
-
-! This file was ported from Lean 3 source module algebra.polynomial.group_ring_action
-! leanprover-community/mathlib commit 10bf4f825ad729c5653adc039dafa3622e7f93c9
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Algebra.GroupRingAction.Basic
 import Mathbin.Algebra.Hom.GroupAction
@@ -14,6 +9,8 @@ import Mathbin.Data.Polynomial.AlgebraMap
 import Mathbin.Data.Polynomial.Monic
 import Mathbin.GroupTheory.GroupAction.Quotient
 
+#align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"10bf4f825ad729c5653adc039dafa3622e7f93c9"
+
 /-!
 # Group action on rings applied to polynomials

10bf4f82

bump to nightly-2023-06-20-01

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

9b351f8c

Diff

@@ -42,7 +42,7 @@ theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     DistribMulAction.toAddMonoidHom R[X] m =
       (map_ring_hom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom
     by ext1 r; exact AddMonoidHom.congr_fun this r
-  ext (n r) : 2
+  ext n r : 2
   change m • monomial n r = map (MulSemiringAction.toRingHom M R m) (monomial n r)
   simpa only [Polynomial.map_monomial, Polynomial.smul_monomial]
 #align polynomial.smul_eq_map Polynomial.smul_eq_map

10bf4f82

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -34,6 +34,7 @@ variable (R : Type _) [Semiring R]
 
 variable {M}
 
+#print Polynomial.smul_eq_map /-
 theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     (· • ·) m = map (MulSemiringAction.toRingHom M R m) :=
   by
@@ -45,6 +46,7 @@ theorem smul_eq_map [MulSemiringAction M R] (m : M) :
   change m • monomial n r = map (MulSemiringAction.toRingHom M R m) (monomial n r)
   simpa only [Polynomial.map_monomial, Polynomial.smul_monomial]
 #align polynomial.smul_eq_map Polynomial.smul_eq_map
+-/
 
 variable (M)
 
@@ -60,29 +62,37 @@ variable {M R}
 
 variable [MulSemiringAction M R]
 
+#print Polynomial.smul_X /-
 @[simp]
 theorem smul_X (m : M) : (m • X : R[X]) = X :=
   (smul_eq_map R m).symm ▸ map_X _
 #align polynomial.smul_X Polynomial.smul_X
+-/
 
 variable (S : Type _) [CommSemiring S] [MulSemiringAction M S]
 
+#print Polynomial.smul_eval_smul /-
 theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m • f.eval x :=
   Polynomial.induction_on f (fun r => by rw [smul_C, eval_C, eval_C])
     (fun f g ihf ihg => by rw [smul_add, eval_add, ihf, ihg, eval_add, smul_add]) fun n r ih => by
     rw [smul_mul', smul_pow', smul_C, smul_X, eval_mul, eval_C, eval_pow, eval_X, eval_mul, eval_C,
       eval_pow, eval_X, smul_mul', smul_pow']
 #align polynomial.smul_eval_smul Polynomial.smul_eval_smul
+-/
 
 variable (G : Type _) [Group G]
 
+#print Polynomial.eval_smul' /-
 theorem eval_smul' [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     f.eval (g • x) = g • (g⁻¹ • f).eval x := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.eval_smul' Polynomial.eval_smul'
+-/
 
+#print Polynomial.smul_eval /-
 theorem smul_eval [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     (g • f).eval x = g • f.eval (g⁻¹ • x) := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.smul_eval Polynomial.smul_eval
+-/
 
 end Polynomial
 
@@ -110,21 +120,27 @@ theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
 #align prod_X_sub_smul.monic prodXSubSmul.monic
 -/
 
+#print prodXSubSmul.eval /-
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
   (MonoidHom.map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
 #align prod_X_sub_smul.eval prodXSubSmul.eval
+-/
 
+#print prodXSubSmul.smul /-
 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' => by
       rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]
 #align prod_X_sub_smul.smul prodXSubSmul.smul
+-/
 
+#print prodXSubSmul.coeff /-
 theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
     g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by
   rw [← Polynomial.coeff_smul, prodXSubSmul.smul]
 #align prod_X_sub_smul.coeff prodXSubSmul.coeff
+-/
 
 end CommRing
 
@@ -138,6 +154,7 @@ variable {Q : Type _} [CommSemiring Q] [MulSemiringAction M Q]
 
 open Polynomial
 
+#print MulSemiringActionHom.polynomial /-
 /-- An equivariant map induces an equivariant map on polynomials. -/
 protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
     where
@@ -156,11 +173,14 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
   map_one' := Polynomial.map_one g
   map_mul' p q := Polynomial.map_mul g
 #align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomial
+-/
 
+#print MulSemiringActionHom.coe_polynomial /-
 @[simp]
 theorem coe_polynomial (g : P →+*[M] Q) : (g.Polynomial : P[X] → Q[X]) = map g :=
   rfl
 #align mul_semiring_action_hom.coe_polynomial MulSemiringActionHom.coe_polynomial
+-/
 
 end MulSemiringActionHom

10bf4f82

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -26,7 +26,7 @@ This file contains instances and definitions relating `mul_semiring_action` to `
 
 variable (M : Type _) [Monoid M]
 
-open Polynomial
+open scoped Polynomial
 
 namespace Polynomial
 
@@ -94,7 +94,7 @@ variable (R : Type _) [CommRing R] [MulSemiringAction G R]
 
 open MulAction
 
-open Classical
+open scoped Classical
 
 #print prodXSubSmul /-
 /-- the product of `(X - g • x)` over distinct `g • x`. -/

10bf4f82

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -34,12 +34,6 @@ variable (R : Type _) [Semiring R]
 
 variable {M}
 
-/- warning: polynomial.smul_eq_map -> Polynomial.smul_eq_map is a dubious translation:
-lean 3 declaration is
-  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] (R : Type.{u2}) [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} ((Polynomial.{u2} R _inst_2) -> (Polynomial.{u2} R _inst_2)) (SMul.smul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toHasSmul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSmulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3))))) m) (Polynomial.map.{u2, u2} R R _inst_2 _inst_2 (MulSemiringAction.toRingHom.{u2, u1} M _inst_1 R _inst_2 _inst_3 m))
-but is expected to have type
-  forall {M : Type.{u2}} [_inst_1 : Monoid.{u2} M] (R : Type.{u1}) [_inst_2 : Semiring.{u1} R] [_inst_3 : MulSemiringAction.{u2, u1} M R _inst_1 _inst_2] (m : M), Eq.{succ u1} ((Polynomial.{u1} R _inst_2) -> (Polynomial.{u1} R _inst_2)) (HSMul.hSMul.{u2, u1, u1} M (Polynomial.{u1} R _inst_2) (Polynomial.{u1} R _inst_2) (instHSMul.{u2, u1} M (Polynomial.{u1} R _inst_2) (SMulZeroClass.toSMul.{u2, u1} M (Polynomial.{u1} R _inst_2) (Polynomial.zero.{u1} R _inst_2) (Polynomial.smulZeroClass.{u1, u2} R _inst_2 M (DistribSMul.toSMulZeroClass.{u2, u1} M R (AddMonoid.toAddZeroClass.{u1} R (AddMonoidWithOne.toAddMonoid.{u1} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} R (NonAssocSemiring.toAddCommMonoidWithOne.{u1} R (Semiring.toNonAssocSemiring.{u1} R _inst_2))))) (DistribMulAction.toDistribSMul.{u2, u1} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} R (NonAssocSemiring.toAddCommMonoidWithOne.{u1} R (Semiring.toNonAssocSemiring.{u1} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u2, u1} M R _inst_1 _inst_2 _inst_3)))))) m) (Polynomial.map.{u1, u1} R R _inst_2 _inst_2 (MulSemiringAction.toRingHom.{u1, u2} M _inst_1 R _inst_2 _inst_3 m))
-Case conversion may be inaccurate. Consider using '#align polynomial.smul_eq_map Polynomial.smul_eq_mapₓ'. -/
 theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     (· • ·) m = map (MulSemiringAction.toRingHom M R m) :=
   by
@@ -66,12 +60,6 @@ variable {M R}
 
 variable [MulSemiringAction M R]
 
-/- warning: polynomial.smul_X -> Polynomial.smul_X is a dubious translation:
-lean 3 declaration is
-  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] {R : Type.{u2}} [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} (Polynomial.{u2} R _inst_2) (SMul.smul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toHasSmul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSmulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3))))) m (Polynomial.X.{u2} R _inst_2)) (Polynomial.X.{u2} R _inst_2)
-but is expected to have type
-  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] {R : Type.{u2}} [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} (Polynomial.{u2} R _inst_2) (HSMul.hSMul.{u1, u2, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.{u2} R _inst_2) (instHSMul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toSMul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSMulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3)))))) m (Polynomial.X.{u2} R _inst_2)) (Polynomial.X.{u2} R _inst_2)
-Case conversion may be inaccurate. Consider using '#align polynomial.smul_X Polynomial.smul_Xₓ'. -/
 @[simp]
 theorem smul_X (m : M) : (m • X : R[X]) = X :=
   (smul_eq_map R m).symm ▸ map_X _
@@ -79,12 +67,6 @@ theorem smul_X (m : M) : (m • X : R[X]) = X :=
 
 variable (S : Type _) [CommSemiring S] [MulSemiringAction M S]
 
-/- warning: polynomial.smul_eval_smul -> Polynomial.smul_eval_smul is a dubious translation:
-lean 3 declaration is
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-Case conversion may be inaccurate. Consider using '#align polynomial.smul_eval_smul Polynomial.smul_eval_smulₓ'. -/
 theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m • f.eval x :=
   Polynomial.induction_on f (fun r => by rw [smul_C, eval_C, eval_C])
     (fun f g ihf ihg => by rw [smul_add, eval_add, ihf, ihg, eval_add, smul_add]) fun n r ih => by
@@ -94,22 +76,10 @@ theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m
 
 variable (G : Type _) [Group G]
 
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-Case conversion may be inaccurate. Consider using '#align polynomial.eval_smul' Polynomial.eval_smul'ₓ'. -/
 theorem eval_smul' [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     f.eval (g • x) = g • (g⁻¹ • f).eval x := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.eval_smul' Polynomial.eval_smul'
 
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 theorem smul_eval [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     (g • f).eval x = g • f.eval (g⁻¹ • x) := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.smul_eval Polynomial.smul_eval
@@ -140,35 +110,17 @@ theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
 #align prod_X_sub_smul.monic prodXSubSmul.monic
 -/
 
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 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
   (MonoidHom.map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
 #align prod_X_sub_smul.eval prodXSubSmul.eval
 
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 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' => by
       rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]
 #align prod_X_sub_smul.smul prodXSubSmul.smul
 
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-Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.coeff prodXSubSmul.coeffₓ'. -/
 theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
     g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by
   rw [← Polynomial.coeff_smul, prodXSubSmul.smul]
@@ -186,12 +138,6 @@ variable {Q : Type _} [CommSemiring Q] [MulSemiringAction M Q]
 
 open Polynomial
 
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-Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomialₓ'. -/
 /-- An equivariant map induces an equivariant map on polynomials. -/
 protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
     where
@@ -211,9 +157,6 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
   map_mul' p q := Polynomial.map_mul g
 #align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomial
 
-/- warning: mul_semiring_action_hom.coe_polynomial -> MulSemiringActionHom.coe_polynomial is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.coe_polynomial MulSemiringActionHom.coe_polynomialₓ'. -/
 @[simp]
 theorem coe_polynomial (g : P →+*[M] Q) : (g.Polynomial : P[X] → Q[X]) = map g :=
   rfl

10bf4f82

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -46,9 +46,7 @@ theorem smul_eq_map [MulSemiringAction M R] (m : M) :
   suffices
     DistribMulAction.toAddMonoidHom R[X] m =
       (map_ring_hom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom
-    by
-    ext1 r
-    exact AddMonoidHom.congr_fun this r
+    by ext1 r; exact AddMonoidHom.congr_fun this r
   ext (n r) : 2
   change m • monomial n r = map (MulSemiringAction.toRingHom M R m) (monomial n r)
   simpa only [Polynomial.map_monomial, Polynomial.smul_monomial]

10bf4f82

bump to nightly-2023-05-28-03

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

6c6011cf

Diff

@@ -214,10 +214,7 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
 #align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomial
 
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(AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3))))) (SMulZeroClass.toSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toZero.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribSMul.toSMulZeroClass.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toAddZeroClass.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribMulAction.toDistribSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (DistribMulActionHomClass.toSMulHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHomClass.toDistribMulActionHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (MulSemiringActionHom.polynomial.{u3, u2, u1} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (Polynomial.map.{u2, u1} P Q (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (RingHomClass.toRingHom.{max u2 u1, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringActionHomClass.toRingHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) M P Q _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (MulSemiringAction.toDistribMulAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (MulSemiringAction.toDistribMulAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) g))
+<too large>
 Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.coe_polynomial MulSemiringActionHom.coe_polynomialₓ'. -/
 @[simp]
 theorem coe_polynomial (g : P →+*[M] Q) : (g.Polynomial : P[X] → Q[X]) = map g :=

10bf4f82

bump to nightly-2023-05-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/8d33f09cd7089ecf074b4791907588245aec5d1b

fbc7b476

Diff

@@ -217,7 +217,7 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
 lean 3 declaration is
   forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] {P : Type.{u2}} [_inst_2 : CommSemiring.{u2} P] [_inst_3 : MulSemiringAction.{u1, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2)] {Q : Type.{u3}} [_inst_4 : CommSemiring.{u3} Q] [_inst_5 : MulSemiringAction.{u1, u3} M Q _inst_1 (CommSemiring.toSemiring.{u3} Q _inst_4)] (g : MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5), Eq.{max (succ u2) (succ u3)} ((fun (_x : MulSemiringActionHom.{u1, u2, u3} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.mulSemiringAction.{u1, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.semiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.mulSemiringAction.{u1, u3} M _inst_1 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5)) => (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) -> (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4))) (MulSemiringActionHom.polynomial.{u1, u2, u3} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (coeFn.{max (succ u2) (succ u3), max (succ u2) (succ u3)} (MulSemiringActionHom.{u1, u2, u3} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.mulSemiringAction.{u1, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.semiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.mulSemiringAction.{u1, u3} M _inst_1 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5)) (fun (_x : MulSemiringActionHom.{u1, u2, u3} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.mulSemiringAction.{u1, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.semiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.mulSemiringAction.{u1, u3} M _inst_1 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5)) => (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) -> (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4))) ([anonymous].{u1, u2, u3} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.mulSemiringAction.{u1, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.semiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (Polynomial.mulSemiringAction.{u1, u3} M _inst_1 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5)) (MulSemiringActionHom.polynomial.{u1, u2, u3} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (Polynomial.map.{u2, u3} P Q (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u3} Q _inst_4) ((fun (a : Sort.{max (succ u2) (succ u3)}) (b : Sort.{max (succ u2) (succ u3)}) [self : HasLiftT.{max (succ u2) (succ u3), max (succ u2) (succ u3)} a b] => self.0) (MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) (RingHom.{u2, u3} P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4))) (HasLiftT.mk.{max (succ u2) (succ u3), max (succ u2) (succ u3)} (MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) (RingHom.{u2, u3} P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4))) (CoeTCₓ.coe.{max (succ u2) (succ u3), max (succ u2) (succ u3)} (MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) (RingHom.{u2, u3} P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4))) (RingHom.hasCoeT.{max u2 u3, u2, u3} (MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u3} Q (CommSemiring.toSemiring.{u3} Q _inst_4)) (MulSemiringActionHomClass.toRingHomClass.{max u2 u3, u1, u2, u3} (MulSemiringActionHom.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) M P Q _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u3} Q _inst_4) (MulSemiringAction.toDistribMulAction.{u1, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (MulSemiringAction.toDistribMulAction.{u1, u3} M Q _inst_1 (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5) (MulSemiringActionHom.mulSemiringActionHomClass.{u1, u2, u3} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u3} Q _inst_4) _inst_5))))) g))
 but is expected to have type
-  forall {M : Type.{u3}} [_inst_1 : Monoid.{u3} M] {P : Type.{u2}} [_inst_2 : CommSemiring.{u2} P] [_inst_3 : MulSemiringAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2)] {Q : Type.{u1}} [_inst_4 : CommSemiring.{u1} Q] [_inst_5 : MulSemiringAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4)] (g : MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5), Eq.{max (succ u2) (succ u1)} (forall (a : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)), (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2186 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) a) (FunLike.coe.{max (succ u2) (succ u1), succ u2, succ u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (fun (_x : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2186 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _x) (SMulHomClass.toFunLike.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (SMulZeroClass.toSMul.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoid.toZero.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribSMul.toSMulZeroClass.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoid.toAddZeroClass.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribMulAction.toDistribSMul.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3))))) (SMulZeroClass.toSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toZero.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribSMul.toSMulZeroClass.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toAddZeroClass.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribMulAction.toDistribSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (DistribMulActionHomClass.toSMulHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHomClass.toDistribMulActionHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (MulSemiringActionHom.polynomial.{u3, u2, u1} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (Polynomial.map.{u2, u1} P Q (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (RingHomClass.toRingHom.{max u2 u1, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringActionHomClass.toRingHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) M P Q _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (MulSemiringAction.toDistribMulAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (MulSemiringAction.toDistribMulAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) g))
+  forall {M : Type.{u3}} [_inst_1 : Monoid.{u3} M] {P : Type.{u2}} [_inst_2 : CommSemiring.{u2} P] [_inst_3 : MulSemiringAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2)] {Q : Type.{u1}} [_inst_4 : CommSemiring.{u1} Q] [_inst_5 : MulSemiringAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4)] (g : MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5), Eq.{max (succ u2) (succ u1)} (forall (a : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)), (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2187 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) a) (FunLike.coe.{max (succ u2) (succ u1), succ u2, succ u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (fun (_x : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2187 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _x) (SMulHomClass.toFunLike.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (SMulZeroClass.toSMul.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoid.toZero.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribSMul.toSMulZeroClass.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoid.toAddZeroClass.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribMulAction.toDistribSMul.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3))))) (SMulZeroClass.toSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toZero.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribSMul.toSMulZeroClass.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toAddZeroClass.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribMulAction.toDistribSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (DistribMulActionHomClass.toSMulHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHomClass.toDistribMulActionHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (MulSemiringActionHom.polynomial.{u3, u2, u1} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (Polynomial.map.{u2, u1} P Q (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (RingHomClass.toRingHom.{max u2 u1, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringActionHomClass.toRingHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) M P Q _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (MulSemiringAction.toDistribMulAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (MulSemiringAction.toDistribMulAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) g))
 Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.coe_polynomial MulSemiringActionHom.coe_polynomialₓ'. -/
 @[simp]
 theorem coe_polynomial (g : P →+*[M] Q) : (g.Polynomial : P[X] → Q[X]) = map g :=

10bf4f82

bump to nightly-2023-05-08-22

mathlib commit https://github.com/leanprover-community/mathlib/commit/08e1d8d4d989df3a6df86f385e9053ec8a372cc1

63e712c6

Diff

@@ -146,7 +146,7 @@ theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
 lean 3 declaration is
   forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R), Eq.{succ u2} R (Polynomial.eval.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) x (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (OfNat.ofNat.{u2} R 0 (OfNat.mk.{u2} R 0 (Zero.zero.{u2} R (MulZeroClass.toHasZero.{u2} R (NonUnitalNonAssocSemiring.toMulZeroClass.{u2} R (NonUnitalNonAssocRing.toNonUnitalNonAssocSemiring.{u2} R (NonAssocRing.toNonUnitalNonAssocRing.{u2} R (Ring.toNonAssocRing.{u2} R (CommRing.toRing.{u2} R _inst_4)))))))))
 but is expected to have type
-  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R), Eq.{succ u2} R (Polynomial.eval.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) x (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (OfNat.ofNat.{u2} R 0 (Zero.toOfNat0.{u2} R (CommMonoidWithZero.toZero.{u2} R (CommSemiring.toCommMonoidWithZero.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)))))
+  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))] (x : R), Eq.{succ u2} R (Polynomial.eval.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)) x (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (OfNat.ofNat.{u2} R 0 (Zero.toOfNat0.{u2} R (CommMonoidWithZero.toZero.{u2} R (CommSemiring.toCommMonoidWithZero.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)))))
 Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.eval prodXSubSmul.evalₓ'. -/
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
   (MonoidHom.map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
@@ -157,7 +157,7 @@ theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
 lean 3 declaration is
   forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMul.smul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toHasSmul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSmulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (AddCommGroupWithOne.toAddGroupWithOne.{u2} R (Ring.toAddCommGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (AddCommGroupWithOne.toAddGroupWithOne.{u2} R (Ring.toAddCommGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
 but is expected to have type
-  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (HSMul.hSMul.{u1, u2, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (instHSMul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toSMul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSMulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5)))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
+  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (HSMul.hSMul.{u1, u2, u2} G (Polynomial.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (Polynomial.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (instHSMul.{u1, u2} G (Polynomial.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (SMulZeroClass.toSMul.{u1, u2} G (Polynomial.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (Polynomial.zero.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)) G (DistribSMul.toSMulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5)))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
 Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.smul prodXSubSmul.smulₓ'. -/
 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
   Finset.smul_prod.trans <|
@@ -169,7 +169,7 @@ theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubS
 lean 3 declaration is
   forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G) (n : Nat), Eq.{succ u2} R (SMul.smul.{u1, u2} G R (SMulZeroClass.toHasSmul.{u1, u2} G R (AddZeroClass.toHasZero.{u2} R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)))))))) (DistribSMul.toSmulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5)))) g (Polynomial.coeff.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)) (Polynomial.coeff.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)
 but is expected to have type
-  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G) (n : Nat), Eq.{succ u2} R (HSMul.hSMul.{u1, u2, u2} G R R (instHSMul.{u1, u2} G R (SMulZeroClass.toSMul.{u1, u2} G R (CommMonoidWithZero.toZero.{u2} R (CommSemiring.toCommMonoidWithZero.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (DistribSMul.toSMulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (Polynomial.coeff.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)) (Polynomial.coeff.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)
+  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))] (x : R) (g : G) (n : Nat), Eq.{succ u2} R (HSMul.hSMul.{u1, u2, u2} G R R (instHSMul.{u1, u2} G R (SMulZeroClass.toSMul.{u1, u2} G R (CommMonoidWithZero.toZero.{u2} R (CommSemiring.toCommMonoidWithZero.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4))) (DistribSMul.toSMulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (Polynomial.coeff.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)) (Polynomial.coeff.{u2} R (CommSemiring.toSemiring.{u2} R (CommRing.toCommSemiring.{u2} R _inst_4)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x) n)
 Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.coeff prodXSubSmul.coeffₓ'. -/
 theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
     g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by

10bf4f82

bump to nightly-2023-03-27-02

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce86f4e05e9a9b8da5e316b22c76ce76440c56a1

0e4ebd8c

Diff

@@ -155,7 +155,7 @@ theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
 
 /- warning: prod_X_sub_smul.smul -> prodXSubSmul.smul is a dubious translation:
 lean 3 declaration is
-  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMul.smul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toHasSmul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSmulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (NonAssocRing.toAddGroupWithOne.{u2} R (Ring.toNonAssocRing.{u2} R (CommRing.toRing.{u2} R _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (NonAssocRing.toAddGroupWithOne.{u2} R (Ring.toNonAssocRing.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
+  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMul.smul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toHasSmul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSmulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (AddCommGroupWithOne.toAddGroupWithOne.{u2} R (Ring.toAddCommGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (AddCommGroupWithOne.toAddGroupWithOne.{u2} R (Ring.toAddCommGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
 but is expected to have type
   forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (HSMul.hSMul.{u1, u2, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (instHSMul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toSMul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSMulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (Ring.toAddGroupWithOne.{u2} R (CommRing.toRing.{u2} R _inst_4)))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5)))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
 Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.smul prodXSubSmul.smulₓ'. -/

10bf4f82

bump to nightly-2023-03-16-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce7e9d53d4bbc38065db3b595cd5bd73c323bc1d

8ae28b0b

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 
 ! This file was ported from Lean 3 source module algebra.polynomial.group_ring_action
-! leanprover-community/mathlib commit afad8e438d03f9d89da2914aa06cb4964ba87a18
+! leanprover-community/mathlib commit 10bf4f825ad729c5653adc039dafa3622e7f93c9
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -17,6 +17,9 @@ import Mathbin.GroupTheory.GroupAction.Quotient
 /-!
 # Group action on rings applied to polynomials
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 This file contains instances and definitions relating `mul_semiring_action` to `polynomial`.
 -/

afad8e43

bump to nightly-2023-03-14-10

mathlib commit https://github.com/leanprover-community/mathlib/commit/2196ab363eb097c008d4497125e0dde23fb36db2

f296636f

Diff

@@ -31,6 +31,12 @@ variable (R : Type _) [Semiring R]
 
 variable {M}
 
+/- warning: polynomial.smul_eq_map -> Polynomial.smul_eq_map is a dubious translation:
+lean 3 declaration is
+  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] (R : Type.{u2}) [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} ((Polynomial.{u2} R _inst_2) -> (Polynomial.{u2} R _inst_2)) (SMul.smul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toHasSmul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSmulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3))))) m) (Polynomial.map.{u2, u2} R R _inst_2 _inst_2 (MulSemiringAction.toRingHom.{u2, u1} M _inst_1 R _inst_2 _inst_3 m))
+but is expected to have type
+  forall {M : Type.{u2}} [_inst_1 : Monoid.{u2} M] (R : Type.{u1}) [_inst_2 : Semiring.{u1} R] [_inst_3 : MulSemiringAction.{u2, u1} M R _inst_1 _inst_2] (m : M), Eq.{succ u1} ((Polynomial.{u1} R _inst_2) -> (Polynomial.{u1} R _inst_2)) (HSMul.hSMul.{u2, u1, u1} M (Polynomial.{u1} R _inst_2) (Polynomial.{u1} R _inst_2) (instHSMul.{u2, u1} M (Polynomial.{u1} R _inst_2) (SMulZeroClass.toSMul.{u2, u1} M (Polynomial.{u1} R _inst_2) (Polynomial.zero.{u1} R _inst_2) (Polynomial.smulZeroClass.{u1, u2} R _inst_2 M (DistribSMul.toSMulZeroClass.{u2, u1} M R (AddMonoid.toAddZeroClass.{u1} R (AddMonoidWithOne.toAddMonoid.{u1} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} R (NonAssocSemiring.toAddCommMonoidWithOne.{u1} R (Semiring.toNonAssocSemiring.{u1} R _inst_2))))) (DistribMulAction.toDistribSMul.{u2, u1} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} R (NonAssocSemiring.toAddCommMonoidWithOne.{u1} R (Semiring.toNonAssocSemiring.{u1} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u2, u1} M R _inst_1 _inst_2 _inst_3)))))) m) (Polynomial.map.{u1, u1} R R _inst_2 _inst_2 (MulSemiringAction.toRingHom.{u1, u2} M _inst_1 R _inst_2 _inst_3 m))
+Case conversion may be inaccurate. Consider using '#align polynomial.smul_eq_map Polynomial.smul_eq_mapₓ'. -/
 theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     (· • ·) m = map (MulSemiringAction.toRingHom M R m) :=
   by
@@ -59,13 +65,25 @@ variable {M R}
 
 variable [MulSemiringAction M R]
 
+/- warning: polynomial.smul_X -> Polynomial.smul_X is a dubious translation:
+lean 3 declaration is
+  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] {R : Type.{u2}} [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} (Polynomial.{u2} R _inst_2) (SMul.smul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toHasSmul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSmulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3))))) m (Polynomial.X.{u2} R _inst_2)) (Polynomial.X.{u2} R _inst_2)
+but is expected to have type
+  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] {R : Type.{u2}} [_inst_2 : Semiring.{u2} R] [_inst_3 : MulSemiringAction.{u1, u2} M R _inst_1 _inst_2] (m : M), Eq.{succ u2} (Polynomial.{u2} R _inst_2) (HSMul.hSMul.{u1, u2, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.{u2} R _inst_2) (instHSMul.{u1, u2} M (Polynomial.{u2} R _inst_2) (SMulZeroClass.toSMul.{u1, u2} M (Polynomial.{u2} R _inst_2) (Polynomial.zero.{u2} R _inst_2) (Polynomial.smulZeroClass.{u2, u1} R _inst_2 M (DistribSMul.toSMulZeroClass.{u1, u2} M R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2))))) (DistribMulAction.toDistribSMul.{u1, u2} M R _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} R (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} R (NonAssocSemiring.toAddCommMonoidWithOne.{u2} R (Semiring.toNonAssocSemiring.{u2} R _inst_2)))) (MulSemiringAction.toDistribMulAction.{u1, u2} M R _inst_1 _inst_2 _inst_3)))))) m (Polynomial.X.{u2} R _inst_2)) (Polynomial.X.{u2} R _inst_2)
+Case conversion may be inaccurate. Consider using '#align polynomial.smul_X Polynomial.smul_Xₓ'. -/
 @[simp]
-theorem smul_x (m : M) : (m • X : R[X]) = X :=
+theorem smul_X (m : M) : (m • X : R[X]) = X :=
   (smul_eq_map R m).symm ▸ map_X _
-#align polynomial.smul_X Polynomial.smul_x
+#align polynomial.smul_X Polynomial.smul_X
 
 variable (S : Type _) [CommSemiring S] [MulSemiringAction M S]
 
+/- warning: polynomial.smul_eval_smul -> Polynomial.smul_eval_smul is a dubious translation:
+lean 3 declaration is
+  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] (S : Type.{u2}) [_inst_4 : CommSemiring.{u2} S] [_inst_5 : MulSemiringAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4)] (m : M) (f : Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (x : S), Eq.{succ u2} S (Polynomial.eval.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4) (SMul.smul.{u1, u2} M S (SMulZeroClass.toHasSmul.{u1, u2} M S (AddZeroClass.toHasZero.{u2} S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5)))) m x) (SMul.smul.{u1, u2} M (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (SMulZeroClass.toHasSmul.{u1, u2} M (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (Polynomial.zero.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (Polynomial.smulZeroClass.{u2, u1} S (CommSemiring.toSemiring.{u2} S _inst_4) M (DistribSMul.toSmulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5))))) m f)) (SMul.smul.{u1, u2} M S (SMulZeroClass.toHasSmul.{u1, u2} M S (AddZeroClass.toHasZero.{u2} S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5)))) m (Polynomial.eval.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4) x f))
+but is expected to have type
+  forall {M : Type.{u1}} [_inst_1 : Monoid.{u1} M] (S : Type.{u2}) [_inst_4 : CommSemiring.{u2} S] [_inst_5 : MulSemiringAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4)] (m : M) (f : Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (x : S), Eq.{succ u2} S (Polynomial.eval.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4) (HSMul.hSMul.{u1, u2, u2} M S S (instHSMul.{u1, u2} M S (SMulZeroClass.toSMul.{u1, u2} M S (CommMonoidWithZero.toZero.{u2} S (CommSemiring.toCommMonoidWithZero.{u2} S _inst_4)) (DistribSMul.toSMulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5))))) m x) (HSMul.hSMul.{u1, u2, u2} M (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (instHSMul.{u1, u2} M (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (SMulZeroClass.toSMul.{u1, u2} M (Polynomial.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (Polynomial.zero.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)) (Polynomial.smulZeroClass.{u2, u1} S (CommSemiring.toSemiring.{u2} S _inst_4) M (DistribSMul.toSMulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5)))))) m f)) (HSMul.hSMul.{u1, u2, u2} M S S (instHSMul.{u1, u2} M S (SMulZeroClass.toSMul.{u1, u2} M S (CommMonoidWithZero.toZero.{u2} S (CommSemiring.toCommMonoidWithZero.{u2} S _inst_4)) (DistribSMul.toSMulZeroClass.{u1, u2} M S (AddMonoid.toAddZeroClass.{u2} S (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} M S _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} S (NonAssocSemiring.toAddCommMonoidWithOne.{u2} S (Semiring.toNonAssocSemiring.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} M S _inst_1 (CommSemiring.toSemiring.{u2} S _inst_4) _inst_5))))) m (Polynomial.eval.{u2} S (CommSemiring.toSemiring.{u2} S _inst_4) x f))
+Case conversion may be inaccurate. Consider using '#align polynomial.smul_eval_smul Polynomial.smul_eval_smulₓ'. -/
 theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m • f.eval x :=
   Polynomial.induction_on f (fun r => by rw [smul_C, eval_C, eval_C])
     (fun f g ihf ihg => by rw [smul_add, eval_add, ihf, ihg, eval_add, smul_add]) fun n r ih => by
@@ -75,10 +93,22 @@ theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m
 
 variable (G : Type _) [Group G]
 
+/- warning: polynomial.eval_smul' -> Polynomial.eval_smul' is a dubious translation:
+lean 3 declaration is
+  forall (S : Type.{u1}) [_inst_4 : CommSemiring.{u1} S] (G : Type.{u2}) [_inst_6 : Group.{u2} G] [_inst_7 : MulSemiringAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4)] (g : G) (f : Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (x : S), Eq.{succ u1} S (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) (SMul.smul.{u2, u1} G S (SMulZeroClass.toHasSmul.{u2, u1} G S (AddZeroClass.toHasZero.{u1} S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))) g x) f) (SMul.smul.{u2, u1} G S (SMulZeroClass.toHasSmul.{u2, u1} G S (AddZeroClass.toHasZero.{u1} S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))) g (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) x (SMul.smul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (SMulZeroClass.toHasSmul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.zero.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.smulZeroClass.{u1, u2} S (CommSemiring.toSemiring.{u1} S _inst_4) G (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) (Inv.inv.{u2} G (DivInvMonoid.toHasInv.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) g) f)))
+but is expected to have type
+  forall (S : Type.{u1}) [_inst_4 : CommSemiring.{u1} S] (G : Type.{u2}) [_inst_6 : Group.{u2} G] [_inst_7 : MulSemiringAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4)] (g : G) (f : Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (x : S), Eq.{succ u1} S (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) (HSMul.hSMul.{u2, u1, u1} G S S (instHSMul.{u2, u1} G S (SMulZeroClass.toSMul.{u2, u1} G S (CommMonoidWithZero.toZero.{u1} S (CommSemiring.toCommMonoidWithZero.{u1} S _inst_4)) (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) g x) f) (HSMul.hSMul.{u2, u1, u1} G S S (instHSMul.{u2, u1} G S (SMulZeroClass.toSMul.{u2, u1} G S (CommMonoidWithZero.toZero.{u1} S (CommSemiring.toCommMonoidWithZero.{u1} S _inst_4)) (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) g (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) x (HSMul.hSMul.{u2, u1, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (instHSMul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (SMulZeroClass.toSMul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.zero.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.smulZeroClass.{u1, u2} S (CommSemiring.toSemiring.{u1} S _inst_4) G (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))))) (Inv.inv.{u2} G (InvOneClass.toInv.{u2} G (DivInvOneMonoid.toInvOneClass.{u2} G (DivisionMonoid.toDivInvOneMonoid.{u2} G (Group.toDivisionMonoid.{u2} G _inst_6)))) g) f)))
+Case conversion may be inaccurate. Consider using '#align polynomial.eval_smul' Polynomial.eval_smul'ₓ'. -/
 theorem eval_smul' [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     f.eval (g • x) = g • (g⁻¹ • f).eval x := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.eval_smul' Polynomial.eval_smul'
 
+/- warning: polynomial.smul_eval -> Polynomial.smul_eval is a dubious translation:
+lean 3 declaration is
+  forall (S : Type.{u1}) [_inst_4 : CommSemiring.{u1} S] (G : Type.{u2}) [_inst_6 : Group.{u2} G] [_inst_7 : MulSemiringAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4)] (g : G) (f : Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (x : S), Eq.{succ u1} S (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) x (SMul.smul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (SMulZeroClass.toHasSmul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.zero.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.smulZeroClass.{u1, u2} S (CommSemiring.toSemiring.{u1} S _inst_4) G (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) g f)) (SMul.smul.{u2, u1} G S (SMulZeroClass.toHasSmul.{u2, u1} G S (AddZeroClass.toHasZero.{u1} S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))) g (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) (SMul.smul.{u2, u1} G S (SMulZeroClass.toHasSmul.{u2, u1} G S (AddZeroClass.toHasZero.{u1} S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))))) (DistribSMul.toSmulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))) (Inv.inv.{u2} G (DivInvMonoid.toHasInv.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) g) x) f))
+but is expected to have type
+  forall (S : Type.{u1}) [_inst_4 : CommSemiring.{u1} S] (G : Type.{u2}) [_inst_6 : Group.{u2} G] [_inst_7 : MulSemiringAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4)] (g : G) (f : Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (x : S), Eq.{succ u1} S (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) x (HSMul.hSMul.{u2, u1, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (instHSMul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (SMulZeroClass.toSMul.{u2, u1} G (Polynomial.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.zero.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)) (Polynomial.smulZeroClass.{u1, u2} S (CommSemiring.toSemiring.{u1} S _inst_4) G (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7)))))) g f)) (HSMul.hSMul.{u2, u1, u1} G S S (instHSMul.{u2, u1} G S (SMulZeroClass.toSMul.{u2, u1} G S (CommMonoidWithZero.toZero.{u1} S (CommSemiring.toCommMonoidWithZero.{u1} S _inst_4)) (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) g (Polynomial.eval.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4) (HSMul.hSMul.{u2, u1, u1} G S S (instHSMul.{u2, u1} G S (SMulZeroClass.toSMul.{u2, u1} G S (CommMonoidWithZero.toZero.{u1} S (CommSemiring.toCommMonoidWithZero.{u1} S _inst_4)) (DistribSMul.toSMulZeroClass.{u2, u1} G S (AddMonoid.toAddZeroClass.{u1} S (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4)))))) (DistribMulAction.toDistribSMul.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (AddMonoidWithOne.toAddMonoid.{u1} S (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} S (NonAssocSemiring.toAddCommMonoidWithOne.{u1} S (Semiring.toNonAssocSemiring.{u1} S (CommSemiring.toSemiring.{u1} S _inst_4))))) (MulSemiringAction.toDistribMulAction.{u2, u1} G S (DivInvMonoid.toMonoid.{u2} G (Group.toDivInvMonoid.{u2} G _inst_6)) (CommSemiring.toSemiring.{u1} S _inst_4) _inst_7))))) (Inv.inv.{u2} G (InvOneClass.toInv.{u2} G (DivInvOneMonoid.toInvOneClass.{u2} G (DivisionMonoid.toDivInvOneMonoid.{u2} G (Group.toDivisionMonoid.{u2} G _inst_6)))) g) x) f))
+Case conversion may be inaccurate. Consider using '#align polynomial.smul_eval Polynomial.smul_evalₓ'. -/
 theorem smul_eval [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     (g • f).eval x = g • f.eval (g⁻¹ • x) := by rw [← smul_eval_smul, smul_inv_smul]
 #align polynomial.smul_eval Polynomial.smul_eval
@@ -95,27 +125,49 @@ open MulAction
 
 open Classical
 
+#print prodXSubSmul /-
 /-- the product of `(X - g • x)` over distinct `g • x`. -/
 noncomputable def prodXSubSmul (x : R) : R[X] :=
   (Finset.univ : Finset (G ⧸ MulAction.stabilizer G x)).Prod fun g =>
     Polynomial.X - Polynomial.C (ofQuotientStabilizer G x g)
 #align prod_X_sub_smul prodXSubSmul
+-/
 
+#print prodXSubSmul.monic /-
 theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
   Polynomial.monic_prod_of_monic _ _ fun g _ => Polynomial.monic_X_sub_C _
 #align prod_X_sub_smul.monic prodXSubSmul.monic
+-/
 
+/- warning: prod_X_sub_smul.eval -> prodXSubSmul.eval is a dubious translation:
+lean 3 declaration is
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+but is expected to have type
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+Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.eval prodXSubSmul.evalₓ'. -/
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
   (MonoidHom.map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
 #align prod_X_sub_smul.eval prodXSubSmul.eval
 
+/- warning: prod_X_sub_smul.smul -> prodXSubSmul.smul is a dubious translation:
+lean 3 declaration is
+  forall (G : Type.{u1}) [_inst_2 : Group.{u1} G] [_inst_3 : Fintype.{u1} G] (R : Type.{u2}) [_inst_4 : CommRing.{u2} R] [_inst_5 : MulSemiringAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))] (x : R) (g : G), Eq.{succ u2} (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMul.smul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (SMulZeroClass.toHasSmul.{u1, u2} G (Polynomial.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.zero.{u2} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4))) (Polynomial.smulZeroClass.{u2, u1} R (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) G (DistribSMul.toSmulZeroClass.{u1, u2} G R (AddMonoid.toAddZeroClass.{u2} R (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (NonAssocRing.toAddGroupWithOne.{u2} R (Ring.toNonAssocRing.{u2} R (CommRing.toRing.{u2} R _inst_4)))))) (DistribMulAction.toDistribSMul.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} R (AddGroupWithOne.toAddMonoidWithOne.{u2} R (NonAssocRing.toAddGroupWithOne.{u2} R (Ring.toNonAssocRing.{u2} R (CommRing.toRing.{u2} R _inst_4))))) (MulSemiringAction.toDistribMulAction.{u1, u2} G R (DivInvMonoid.toMonoid.{u1} G (Group.toDivInvMonoid.{u1} G _inst_2)) (Ring.toSemiring.{u2} R (CommRing.toRing.{u2} R _inst_4)) _inst_5))))) g (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)) (prodXSubSmul.{u1, u2} G _inst_2 _inst_3 R _inst_4 _inst_5 x)
+but is expected to have type
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+Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.smul prodXSubSmul.smulₓ'. -/
 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' => by
-      rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_x, Polynomial.smul_C]
+      rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]
 #align prod_X_sub_smul.smul prodXSubSmul.smul
 
+/- warning: prod_X_sub_smul.coeff -> prodXSubSmul.coeff is a dubious translation:
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+Case conversion may be inaccurate. Consider using '#align prod_X_sub_smul.coeff prodXSubSmul.coeffₓ'. -/
 theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
     g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by
   rw [← Polynomial.coeff_smul, prodXSubSmul.smul]
@@ -133,6 +185,12 @@ variable {Q : Type _} [CommSemiring Q] [MulSemiringAction M Q]
 
 open Polynomial
 
+/- warning: mul_semiring_action_hom.polynomial -> MulSemiringActionHom.polynomial is a dubious translation:
+lean 3 declaration is
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+Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomialₓ'. -/
 /-- An equivariant map induces an equivariant map on polynomials. -/
 protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
     where
@@ -152,6 +210,12 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X]
   map_mul' p q := Polynomial.map_mul g
 #align mul_semiring_action_hom.polynomial MulSemiringActionHom.polynomial
 
+/- warning: mul_semiring_action_hom.coe_polynomial -> MulSemiringActionHom.coe_polynomial is a dubious translation:
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+but is expected to have type
+  forall {M : Type.{u3}} [_inst_1 : Monoid.{u3} M] {P : Type.{u2}} [_inst_2 : CommSemiring.{u2} P] [_inst_3 : MulSemiringAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2)] {Q : Type.{u1}} [_inst_4 : CommSemiring.{u1} Q] [_inst_5 : MulSemiringAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4)] (g : MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5), Eq.{max (succ u2) (succ u1)} (forall (a : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)), (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2186 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) a) (FunLike.coe.{max (succ u2) (succ u1), succ u2, succ u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (fun (_x : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => (fun (x._@.Mathlib.Algebra.Hom.GroupAction._hyg.2186 : Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) => Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _x) (SMulHomClass.toFunLike.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 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(CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribSMul.toSMulZeroClass.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoid.toAddZeroClass.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2))))))) (DistribMulAction.toDistribSMul.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3))))) (SMulZeroClass.toSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toZero.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribSMul.toSMulZeroClass.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoid.toAddZeroClass.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4))))))) (DistribMulAction.toDistribSMul.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (DistribMulActionHomClass.toSMulHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (AddMonoidWithOne.toAddMonoid.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (NonAssocSemiring.toAddCommMonoidWithOne.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u2} (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)))))) (AddMonoidWithOne.toAddMonoid.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (AddCommMonoidWithOne.toAddMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (NonAssocSemiring.toAddCommMonoidWithOne.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Semiring.toNonAssocSemiring.{u1} (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)))))) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHomClass.toDistribMulActionHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringAction.toDistribMulAction.{u3, u2} M (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) _inst_1 (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3)) (MulSemiringAction.toDistribMulAction.{u3, u1} M (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) _inst_1 (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 (Polynomial.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.semiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u2} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (Polynomial.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.semiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (Polynomial.instMulSemiringActionPolynomialSemiring.{u3, u1} M _inst_1 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5))))) (MulSemiringActionHom.polynomial.{u3, u2, u1} M _inst_1 P _inst_2 _inst_3 Q _inst_4 _inst_5 g)) (Polynomial.map.{u2, u1} P Q (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (RingHomClass.toRingHom.{max u2 u1, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) P Q (Semiring.toNonAssocSemiring.{u2} P (CommSemiring.toSemiring.{u2} P _inst_2)) (Semiring.toNonAssocSemiring.{u1} Q (CommSemiring.toSemiring.{u1} Q _inst_4)) (MulSemiringActionHomClass.toRingHomClass.{max u2 u1, u3, u2, u1} (MulSemiringActionHom.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) M P Q _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) (CommSemiring.toSemiring.{u1} Q _inst_4) (MulSemiringAction.toDistribMulAction.{u3, u2} M P _inst_1 (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3) (MulSemiringAction.toDistribMulAction.{u3, u1} M Q _inst_1 (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5) (MulSemiringActionHom.instMulSemiringActionHomClassMulSemiringActionHomToDistribMulActionToDistribMulAction.{u3, u2, u1} M _inst_1 P (CommSemiring.toSemiring.{u2} P _inst_2) _inst_3 Q (CommSemiring.toSemiring.{u1} Q _inst_4) _inst_5)) g))
+Case conversion may be inaccurate. Consider using '#align mul_semiring_action_hom.coe_polynomial MulSemiringActionHom.coe_polynomialₓ'. -/
 @[simp]
 theorem coe_polynomial (g : P →+*[M] Q) : (g.Polynomial : P[X] → Q[X]) = map g :=
   rfl

afad8e43

bump to nightly-2023-03-09-14

mathlib commit https://github.com/leanprover-community/mathlib/commit/21e3562c5e12d846c7def5eff8cdbc520d7d4936

15a533f2

Diff

@@ -102,7 +102,7 @@ noncomputable def prodXSubSmul (x : R) : R[X] :=
 #align prod_X_sub_smul prodXSubSmul
 
 theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
-  Polynomial.monic_prod_of_monic _ _ fun g _ => Polynomial.monic_x_sub_c _
+  Polynomial.monic_prod_of_monic _ _ fun g _ => Polynomial.monic_X_sub_C _
 #align prod_X_sub_smul.monic prodXSubSmul.monic
 
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=

afad8e43

bump to nightly-2023-03-08-14

mathlib commit https://github.com/leanprover-community/mathlib/commit/38f16f960f5006c6c0c2bac7b0aba5273188f4e5

f7af4b63

Diff

@@ -61,7 +61,7 @@ variable [MulSemiringAction M R]
 
 @[simp]
 theorem smul_x (m : M) : (m • X : R[X]) = X :=
-  (smul_eq_map R m).symm ▸ map_x _
+  (smul_eq_map R m).symm ▸ map_X _
 #align polynomial.smul_X Polynomial.smul_x
 
 variable (S : Type _) [CommSemiring S] [MulSemiringAction M S]

afad8e43

bump to nightly-2023-03-08-10

mathlib commit https://github.com/leanprover-community/mathlib/commit/38f16f960f5006c6c0c2bac7b0aba5273188f4e5

422cc012

Diff

@@ -60,7 +60,7 @@ variable {M R}
 variable [MulSemiringAction M R]
 
 @[simp]
-theorem smul_x (m : M) : (m • x : R[X]) = x :=
+theorem smul_x (m : M) : (m • X : R[X]) = X :=
   (smul_eq_map R m).symm ▸ map_x _
 #align polynomial.smul_X Polynomial.smul_x
 
@@ -98,7 +98,7 @@ open Classical
 /-- the product of `(X - g • x)` over distinct `g • x`. -/
 noncomputable def prodXSubSmul (x : R) : R[X] :=
   (Finset.univ : Finset (G ⧸ MulAction.stabilizer G x)).Prod fun g =>
-    Polynomial.x - Polynomial.c (ofQuotientStabilizer G x g)
+    Polynomial.X - Polynomial.C (ofQuotientStabilizer G x g)
 #align prod_X_sub_smul prodXSubSmul
 
 theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
@@ -113,7 +113,7 @@ theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' => by
-      rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_x, Polynomial.smul_c]
+      rw [of_quotient_stabilizer_smul, smul_sub, Polynomial.smul_x, Polynomial.smul_C]
 #align prod_X_sub_smul.smul prodXSubSmul.smul
 
 theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :

afad8e43

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

afad8e43

move(Polynomial): Move out of Data (#11751)

Polynomial and MvPolynomial are algebraic objects, hence should be under Algebra (or at least not under Data)

56e439ec

Diff

@@ -4,8 +4,8 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
 import Mathlib.Algebra.GroupRingAction.Basic
-import Mathlib.Data.Polynomial.AlgebraMap
-import Mathlib.Data.Polynomial.Monic
+import Mathlib.Algebra.Polynomial.AlgebraMap
+import Mathlib.Algebra.Polynomial.Monic
 import Mathlib.GroupTheory.GroupAction.Hom
 import Mathlib.GroupTheory.GroupAction.Quotient

afad8e43

feat: MulActionHom in the semilinear style (#6057)

Generalize MulActionHom so that it allows two different monoids acting, related by a morphism. This is inspired by the treatment of (semi)linear maps in mathlib, and allows to refactor them.

Let M, N, X, Y be types, with SMul M X and SMul N Y, and let φ : M → N be a map.

MulActionHom φ X Y, the type of equivariant functions from X to Y, consists of functions f : X → Y such that f (m • x) = (φ m) • (f x) for all m : M and x : X.

Assume that we have Monoid M, Monoid N and that φ : M →* N. For A, B by types with AddMonoid A and AddMonoid B, endowed with DistribMulAction M A and DistribMulAction M B:

DistribMulActionHom φ A B is the type of equivariant additive monoid homomorphisms from A to B.

Similarly, when R and S are types with Semiring R, Semiring S, MulSemiringAction M R and MulSemiringAction N S

SMulSemiringHom φ R S is the type of equivariant ring homomorphisms from R to S.

The above types have corresponding classes:

MulActionHomClass F φ X Y states that F is a type of bundled X → Y homs which are φ-equivariant
DistribMulActionHomClass F φ A B states that F is a type of bundled A → B homs preserving the additive monoid structure and φ-equivariant
SMulSemiringHomClass F φ R S states that F is a type of bundled R → S homs preserving the ring structure and φ-equivariant

Notation

We introduce the following notation to code equivariant maps (the subscript index ₑ is for equivariant) :

X →ₑ[φ] Y is MulActionHom φ X Y.
A →ₑ+[φ] B is DistribMulActionHom φ A B.
R →ₑ+*[φ] S is MulSemiringActionHom φ R S.

When M = N and φ = MonoidHom.id M, we provide the backward compatible notation :

X →[M] Y is MulActionHom ([@id](https://github.com/id) M) X Y
A →+[M] B is DistribMulActionHom (MonoidHom.id M) A B
R →+*[M] S is MulSemiringActionHom (MonoidHom.id M) R S

This more general definition is propagated all over mathlib, in particular to LinearMap.

The treatment of composition of equivariant maps is inspired by that of semilinear maps. We provide classes CompTriple and MonoidHom.CompTriple of “composable triples`, and various instances for them.

8b50609c

Diff

@@ -132,11 +132,12 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X] w
   toFun := map g
   map_smul' m p :=
     Polynomial.induction_on p
-      (fun b ↦ by rw [smul_C, map_C, coe_fn_coe, g.map_smul, map_C, coe_fn_coe, smul_C])
+      (fun b ↦ by rw [MonoidHom.id_apply, smul_C, map_C, coe_fn_coe, g.map_smul, map_C,
+          coe_fn_coe, smul_C])
       (fun p q ihp ihq ↦ by
         rw [smul_add, Polynomial.map_add, ihp, ihq, Polynomial.map_add, smul_add])
-      fun n b _ ↦ by
-      rw [smul_mul', smul_C, smul_pow', smul_X, Polynomial.map_mul, map_C, Polynomial.map_pow,
+      fun n b _ ↦ by rw [MonoidHom.id_apply, smul_mul', smul_C, smul_pow', smul_X,
+        Polynomial.map_mul, map_C, Polynomial.map_pow,
         map_X, coe_fn_coe, g.map_smul, Polynomial.map_mul, map_C, Polynomial.map_pow, map_X,
         smul_mul', smul_C, smul_pow', smul_X, coe_fn_coe]
   -- Porting note: added `.toRingHom`

afad8e43

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

@@ -25,7 +25,6 @@ open Polynomial
 namespace Polynomial
 
 variable (R : Type*) [Semiring R]
-
 variable {M}
 
 -- Porting note: changed `(· • ·) m` to `HSMul.hSMul m`
@@ -50,7 +49,6 @@ noncomputable instance [MulSemiringAction M R] : MulSemiringAction M R[X] :=
       smul_eq_map R m ▸ Polynomial.map_mul (MulSemiringAction.toRingHom M R m) }
 
 variable {M R}
-
 variable [MulSemiringAction M R]
 
 @[simp]
@@ -86,7 +84,6 @@ section CommRing
 set_option linter.uppercaseLean3 false  -- Porting note: `prod_X_*`
 
 variable (G : Type*) [Group G] [Fintype G]
-
 variable (R : Type*) [CommRing R] [MulSemiringAction G R]
 
 open MulAction
@@ -125,9 +122,7 @@ end CommRing
 namespace MulSemiringActionHom
 
 variable {M}
-
 variable {P : Type*} [CommSemiring P] [MulSemiringAction M P]
-
 variable {Q : Type*} [CommSemiring Q] [MulSemiringAction M Q]
 
 open Polynomial

afad8e43

style: homogenise porting notes (#11145)

Homogenises porting notes via capitalisation and addition of whitespace.

It makes the following changes:

converts "--porting note" into "-- Porting note";
converts "porting note" into "Porting note".

8be0b69c

Diff

@@ -28,7 +28,7 @@ variable (R : Type*) [Semiring R]
 
 variable {M}
 
--- porting note: changed `(· • ·) m` to `HSMul.hSMul m`
+-- Porting note: changed `(· • ·) m` to `HSMul.hSMul m`
 theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     HSMul.hSMul m = map (MulSemiringAction.toRingHom M R m) := by
   suffices DistribMulAction.toAddMonoidHom R[X] m =
@@ -83,7 +83,7 @@ theorem smul_eval [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
 end Polynomial
 
 section CommRing
-set_option linter.uppercaseLean3 false  -- porting note: `prod_X_*`
+set_option linter.uppercaseLean3 false  -- Porting note: `prod_X_*`
 
 variable (G : Type*) [Group G] [Fintype G]
 
@@ -144,7 +144,7 @@ protected noncomputable def polynomial (g : P →+*[M] Q) : P[X] →+*[M] Q[X] w
       rw [smul_mul', smul_C, smul_pow', smul_X, Polynomial.map_mul, map_C, Polynomial.map_pow,
         map_X, coe_fn_coe, g.map_smul, Polynomial.map_mul, map_C, Polynomial.map_pow, map_X,
         smul_mul', smul_C, smul_pow', smul_X, coe_fn_coe]
-  -- porting note: added `.toRingHom`
+  -- Porting note: added `.toRingHom`
   map_zero' := Polynomial.map_zero g.toRingHom
   map_add' p q := Polynomial.map_add g.toRingHom
   map_one' := Polynomial.map_one g.toRingHom

afad8e43

chore(*): rename FunLike to DFunLike (#9785)

This prepares for the introduction of a non-dependent synonym of FunLike, which helps a lot with keeping #8386 readable.

This is entirely search-and-replace in 680197f combined with manual fixes in 4145626, e900597 and b8428f8. The commands that generated this change:

sed -i 's/\bFunLike\b/DFunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean
sed -i 's/\btoFunLike\b/toDFunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean
sed -i 's/import Mathlib.Data.DFunLike/import Mathlib.Data.FunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean
sed -i 's/\bHom_FunLike\b/Hom_DFunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean     
sed -i 's/\binstFunLike\b/instDFunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean
sed -i 's/\bfunLike\b/instDFunLike/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean
sed -i 's/\btoo many metavariables to apply `fun_like.has_coe_to_fun`/too many metavariables to apply `DFunLike.hasCoeToFun`/g' {Archive,Counterexamples,Mathlib,test}/**/*.lean

Co-authored-by: Anne Baanen <Vierkantor@users.noreply.github.com>

82656743

Diff

@@ -34,7 +34,7 @@ theorem smul_eq_map [MulSemiringAction M R] (m : M) :
   suffices DistribMulAction.toAddMonoidHom R[X] m =
       (mapRingHom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom by
     ext1 r
-    exact FunLike.congr_fun this r
+    exact DFunLike.congr_fun this r
   ext n r : 2
   change m • monomial n r = map (MulSemiringAction.toRingHom M R m) (monomial n r)
   rw [Polynomial.map_monomial, Polynomial.smul_monomial, MulSemiringAction.toRingHom_apply]

afad8e43

chore: Nsmul -> NSMul, Zpow -> ZPow, etc (#9067)

Normalising to naming convention rule number 6.

9b2f0dca

Diff

@@ -92,33 +92,33 @@ variable (R : Type*) [CommRing R] [MulSemiringAction G R]
 open MulAction
 
 /-- the product of `(X - g • x)` over distinct `g • x`. -/
-noncomputable def prodXSubSmul (x : R) : R[X] :=
+noncomputable def prodXSubSMul (x : R) : R[X] :=
   letI := Classical.decEq R
   (Finset.univ : Finset (G ⧸ MulAction.stabilizer G x)).prod fun g ↦
     Polynomial.X - Polynomial.C (ofQuotientStabilizer G x g)
-#align prod_X_sub_smul prodXSubSmul
+#align prod_X_sub_smul prodXSubSMul
 
-theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
+theorem prodXSubSMul.monic (x : R) : (prodXSubSMul G R x).Monic :=
   Polynomial.monic_prod_of_monic _ _ fun _ _ ↦ Polynomial.monic_X_sub_C _
-#align prod_X_sub_smul.monic prodXSubSmul.monic
+#align prod_X_sub_smul.monic prodXSubSMul.monic
 
-theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
+theorem prodXSubSMul.eval (x : R) : (prodXSubSMul G R x).eval x = 0 :=
   letI := Classical.decEq R
   (map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
-#align prod_X_sub_smul.eval prodXSubSmul.eval
+#align prod_X_sub_smul.eval prodXSubSMul.eval
 
-theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
+theorem prodXSubSMul.smul (x : R) (g : G) : g • prodXSubSMul G R x = prodXSubSMul G R x :=
   letI := Classical.decEq R
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' ↦ by
       rw [ofQuotientStabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]
-#align prod_X_sub_smul.smul prodXSubSmul.smul
+#align prod_X_sub_smul.smul prodXSubSMul.smul
 
-theorem prodXSubSmul.coeff (x : R) (g : G) (n : ℕ) :
-    g • (prodXSubSmul G R x).coeff n = (prodXSubSmul G R x).coeff n := by
-  rw [← Polynomial.coeff_smul, prodXSubSmul.smul]
-#align prod_X_sub_smul.coeff prodXSubSmul.coeff
+theorem prodXSubSMul.coeff (x : R) (g : G) (n : ℕ) :
+    g • (prodXSubSMul G R x).coeff n = (prodXSubSMul G R x).coeff n := by
+  rw [← Polynomial.coeff_smul, prodXSubSMul.smul]
+#align prod_X_sub_smul.coeff prodXSubSMul.coeff
 
 end CommRing

afad8e43

refactor(Algebra/Hom): transpose Hom and file name (#8095)

I believe the file defining a type of morphisms belongs alongside the file defining the structure this morphism works on. So I would like to reorganize the files in the Mathlib.Algebra.Hom folder so that e.g. Mathlib.Algebra.Hom.Ring becomes Mathlib.Algebra.Ring.Hom and Mathlib.Algebra.Hom.NonUnitalAlg becomes Mathlib.Algebra.Algebra.NonUnitalHom.

While fixing the imports I went ahead and sorted them for good luck.

The full list of changes is: renamed: Mathlib/Algebra/Hom/NonUnitalAlg.lean -> Mathlib/Algebra/Algebra/NonUnitalHom.lean renamed: Mathlib/Algebra/Hom/Aut.lean -> Mathlib/Algebra/Group/Aut.lean renamed: Mathlib/Algebra/Hom/Commute.lean -> Mathlib/Algebra/Group/Commute/Hom.lean renamed: Mathlib/Algebra/Hom/Embedding.lean -> Mathlib/Algebra/Group/Embedding.lean renamed: Mathlib/Algebra/Hom/Equiv/Basic.lean -> Mathlib/Algebra/Group/Equiv/Basic.lean renamed: Mathlib/Algebra/Hom/Equiv/TypeTags.lean -> Mathlib/Algebra/Group/Equiv/TypeTags.lean renamed: Mathlib/Algebra/Hom/Equiv/Units/Basic.lean -> Mathlib/Algebra/Group/Units/Equiv.lean renamed: Mathlib/Algebra/Hom/Equiv/Units/GroupWithZero.lean -> Mathlib/Algebra/GroupWithZero/Units/Equiv.lean renamed: Mathlib/Algebra/Hom/Freiman.lean -> Mathlib/Algebra/Group/Freiman.lean renamed: Mathlib/Algebra/Hom/Group/Basic.lean -> Mathlib/Algebra/Group/Hom/Basic.lean renamed: Mathlib/Algebra/Hom/Group/Defs.lean -> Mathlib/Algebra/Group/Hom/Defs.lean renamed: Mathlib/Algebra/Hom/GroupAction.lean -> Mathlib/GroupTheory/GroupAction/Hom.lean renamed: Mathlib/Algebra/Hom/GroupInstances.lean -> Mathlib/Algebra/Group/Hom/Instances.lean renamed: Mathlib/Algebra/Hom/Iterate.lean -> Mathlib/Algebra/GroupPower/IterateHom.lean renamed: Mathlib/Algebra/Hom/Centroid.lean -> Mathlib/Algebra/Ring/CentroidHom.lean renamed: Mathlib/Algebra/Hom/Ring/Basic.lean -> Mathlib/Algebra/Ring/Hom/Basic.lean renamed: Mathlib/Algebra/Hom/Ring/Defs.lean -> Mathlib/Algebra/Ring/Hom/Defs.lean renamed: Mathlib/Algebra/Hom/Units.lean -> Mathlib/Algebra/Group/Units/Hom.lean

Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Reorganizing.20.60Mathlib.2EAlgebra.2EHom.60

92fe122e

Diff

@@ -4,9 +4,9 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
 import Mathlib.Algebra.GroupRingAction.Basic
-import Mathlib.Algebra.Hom.GroupAction
 import Mathlib.Data.Polynomial.AlgebraMap
 import Mathlib.Data.Polynomial.Monic
+import Mathlib.GroupTheory.GroupAction.Hom
 import Mathlib.GroupTheory.GroupAction.Quotient
 
 #align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"afad8e438d03f9d89da2914aa06cb4964ba87a18"

afad8e43

refactor(Data/Polynomial): remove open Classical (#7706)

This doesn't change any polynomial operations, but:

Makes some Decidable values computable (otherwise, they're pointless!)
Add a few missing arguments to lemmas here and there to make them more general

This is exhaustive, within the directories it touches.

Once again, the use of letI := Classical.decEq R instead of classical here is because of the weird style of proofs in these files, where if is preferred to by_cases.

4a7ff0e3

Diff

@@ -91,10 +91,9 @@ variable (R : Type*) [CommRing R] [MulSemiringAction G R]
 
 open MulAction
 
-open Classical
-
 /-- the product of `(X - g • x)` over distinct `g • x`. -/
 noncomputable def prodXSubSmul (x : R) : R[X] :=
+  letI := Classical.decEq R
   (Finset.univ : Finset (G ⧸ MulAction.stabilizer G x)).prod fun g ↦
     Polynomial.X - Polynomial.C (ofQuotientStabilizer G x g)
 #align prod_X_sub_smul prodXSubSmul
@@ -104,11 +103,13 @@ theorem prodXSubSmul.monic (x : R) : (prodXSubSmul G R x).Monic :=
 #align prod_X_sub_smul.monic prodXSubSmul.monic
 
 theorem prodXSubSmul.eval (x : R) : (prodXSubSmul G R x).eval x = 0 :=
+  letI := Classical.decEq R
   (map_prod ((Polynomial.aeval x).toRingHom.toMonoidHom : R[X] →* R) _ _).trans <|
     Finset.prod_eq_zero (Finset.mem_univ <| QuotientGroup.mk 1) <| by simp
 #align prod_X_sub_smul.eval prodXSubSmul.eval
 
 theorem prodXSubSmul.smul (x : R) (g : G) : g • prodXSubSmul G R x = prodXSubSmul G R x :=
+  letI := Classical.decEq R
   Finset.smul_prod.trans <|
     Fintype.prod_bijective _ (MulAction.bijective g) _ _ fun g' ↦ by
       rw [ofQuotientStabilizer_smul, smul_sub, Polynomial.smul_X, Polynomial.smul_C]

afad8e43

perf: remove overspecified fields (#6965)

This removes redundant field values of the form add := add for smaller terms and less unfolding during unification.

A list of all files containing a structure instance of the form { a1, ... with x1 := val, ... } where some xi is a field of some aj was generated by modifying the structure instance elaboration algorithm to print such overlaps to stdout in a custom toolchain.

Using that toolchain, I went through each file on the list and attempted to remove algebraic fields that overlapped and were redundant, eg add := add and not toFun (though some other ones did creep in). If things broke (which was the case in a couple of cases), I did not push further and reverted.

It is possible that pushing harder and trying to remove all redundant overlaps will yield further improvements.

12150475

Diff

@@ -44,7 +44,6 @@ variable (M)
 
 noncomputable instance [MulSemiringAction M R] : MulSemiringAction M R[X] :=
   { Polynomial.distribMulAction with
-    smul := (· • ·)
     smul_one := fun m ↦
       smul_eq_map R m ▸ Polynomial.map_one (MulSemiringAction.toRingHom M R m)
     smul_mul := fun m _ _ ↦

afad8e43

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

@@ -18,13 +18,13 @@ This file contains instances and definitions relating `MulSemiringAction` to `Po
 -/
 
 
-variable (M : Type _) [Monoid M]
+variable (M : Type*) [Monoid M]
 
 open Polynomial
 
 namespace Polynomial
 
-variable (R : Type _) [Semiring R]
+variable (R : Type*) [Semiring R]
 
 variable {M}
 
@@ -60,7 +60,7 @@ theorem smul_X (m : M) : (m • X : R[X]) = X :=
 set_option linter.uppercaseLean3 false in
 #align polynomial.smul_X Polynomial.smul_X
 
-variable (S : Type _) [CommSemiring S] [MulSemiringAction M S]
+variable (S : Type*) [CommSemiring S] [MulSemiringAction M S]
 
 theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m • f.eval x :=
   Polynomial.induction_on f (fun r ↦ by rw [smul_C, eval_C, eval_C])
@@ -69,7 +69,7 @@ theorem smul_eval_smul (m : M) (f : S[X]) (x : S) : (m • f).eval (m • x) = m
       eval_pow, eval_X, smul_mul', smul_pow']
 #align polynomial.smul_eval_smul Polynomial.smul_eval_smul
 
-variable (G : Type _) [Group G]
+variable (G : Type*) [Group G]
 
 theorem eval_smul' [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) :
     f.eval (g • x) = g • (g⁻¹ • f).eval x := by
@@ -86,9 +86,9 @@ end Polynomial
 section CommRing
 set_option linter.uppercaseLean3 false  -- porting note: `prod_X_*`
 
-variable (G : Type _) [Group G] [Fintype G]
+variable (G : Type*) [Group G] [Fintype G]
 
-variable (R : Type _) [CommRing R] [MulSemiringAction G R]
+variable (R : Type*) [CommRing R] [MulSemiringAction G R]
 
 open MulAction
 
@@ -126,9 +126,9 @@ namespace MulSemiringActionHom
 
 variable {M}
 
-variable {P : Type _} [CommSemiring P] [MulSemiringAction M P]
+variable {P : Type*} [CommSemiring P] [MulSemiringAction M P]
 
-variable {Q : Type _} [CommSemiring Q] [MulSemiringAction M Q]
+variable {Q : Type*} [CommSemiring Q] [MulSemiringAction M Q]
 
 open Polynomial

afad8e43

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

@@ -2,11 +2,6 @@
 Copyright (c) 2020 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
-
-! This file was ported from Lean 3 source module algebra.polynomial.group_ring_action
-! leanprover-community/mathlib commit afad8e438d03f9d89da2914aa06cb4964ba87a18
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Algebra.GroupRingAction.Basic
 import Mathlib.Algebra.Hom.GroupAction
@@ -14,6 +9,8 @@ import Mathlib.Data.Polynomial.AlgebraMap
 import Mathlib.Data.Polynomial.Monic
 import Mathlib.GroupTheory.GroupAction.Quotient
 
+#align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"afad8e438d03f9d89da2914aa06cb4964ba87a18"
+
 /-!
 # Group action on rings applied to polynomials

afad8e43

chore: remove superfluous parentheses in calls to ext (#5258)

Co-authored-by: Xavier Roblot <46200072+xroblot@users.noreply.github.com> Co-authored-by: Joël Riou <joel.riou@universite-paris-saclay.fr> Co-authored-by: Riccardo Brasca <riccardo.brasca@gmail.com> Co-authored-by: Yury G. Kudryashov <urkud@urkud.name> Co-authored-by: Scott Morrison <scott.morrison@anu.edu.au> Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Jeremy Tan Jie Rui <reddeloostw@gmail.com> Co-authored-by: Pol'tta / Miyahara Kō <pol_tta@outlook.jp> Co-authored-by: Jason Yuen <jason_yuen2007@hotmail.com> Co-authored-by: Mario Carneiro <di.gama@gmail.com> Co-authored-by: Jireh Loreaux <loreaujy@gmail.com> Co-authored-by: Ruben Van de Velde <65514131+Ruben-VandeVelde@users.noreply.github.com> Co-authored-by: Kyle Miller <kmill31415@gmail.com> Co-authored-by: Heather Macbeth <25316162+hrmacbeth@users.noreply.github.com> Co-authored-by: Jujian Zhang <jujian.zhang1998@outlook.com> Co-authored-by: Yaël Dillies <yael.dillies@gmail.com>

3d6731dc

Diff

@@ -38,7 +38,7 @@ theorem smul_eq_map [MulSemiringAction M R] (m : M) :
       (mapRingHom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom by
     ext1 r
     exact FunLike.congr_fun this r
-  ext (n r) : 2
+  ext n r : 2
   change m • monomial n r = map (MulSemiringAction.toRingHom M R m) (monomial n r)
   rw [Polynomial.map_monomial, Polynomial.smul_monomial, MulSemiringAction.toRingHom_apply]
 #align polynomial.smul_eq_map Polynomial.smul_eq_map

afad8e43

chore: bye-bye, solo bys! (#3825)

This PR puts, with one exception, every single remaining by that lies all by itself on its own line to the previous line, thus matching the current behaviour of start-port.sh. The exception is when the by begins the second or later argument to a tuple or anonymous constructor; see https://github.com/leanprover-community/mathlib4/pull/3825#discussion_r1186702599.

Essentially this is s/\n *by$/ by/g, but with manual editing to satisfy the linter's max-100-char-line requirement. The Python style linter is also modified to catch these "isolated bys".

14167e48

Diff

@@ -34,10 +34,8 @@ variable {M}
 -- porting note: changed `(· • ·) m` to `HSMul.hSMul m`
 theorem smul_eq_map [MulSemiringAction M R] (m : M) :
     HSMul.hSMul m = map (MulSemiringAction.toRingHom M R m) := by
-  suffices
-    DistribMulAction.toAddMonoidHom R[X] m =
-      (mapRingHom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom
-    by
+  suffices DistribMulAction.toAddMonoidHom R[X] m =
+      (mapRingHom (MulSemiringAction.toRingHom M R m)).toAddMonoidHom by
     ext1 r
     exact FunLike.congr_fun this r
   ext (n r) : 2

afad8e43

feat: port Algebra.Polynomial.GroupRingAction (#2863)

c1fa0cc8

`algebra.polynomial.group_ring_action` ⟷ `Mathlib.Algebra.Polynomial.GroupRingAction`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Notation

Dependencies 8 + 478

algebra.polynomial.group_ring_action ⟷ Mathlib.Algebra.Polynomial.GroupRingAction

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Notation

Dependencies 8 + 478

`algebra.polynomial.group_ring_action` ⟷ `Mathlib.Algebra.Polynomial.GroupRingAction`