Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[Merged by Bors] - chore: some erws that can become rw for free #18322

Closed
wants to merge 1 commit into from
Closed

[Merged by Bors] - chore: some erws that can become rw for free #18322

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 2 additions & 5 deletions Mathlib/Algebra/MonoidAlgebra/Defs.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -800,9 +800,7 @@ protected noncomputable def opRingEquiv [Monoid G] :
-- This used to be `rw`, but we need `erw` after leanprover/lean4#2644
erw [AddEquiv.trans_apply, AddEquiv.trans_apply, AddEquiv.trans_apply, AddEquiv.trans_apply,
AddEquiv.trans_apply, AddEquiv.trans_apply, MulOpposite.opAddEquiv_symm_apply]
rw [MulOpposite.unop_mul (α := MonoidAlgebra k G)]
-- This was not needed before leanprover/lean4#2644
erw [unop_op, unop_op, single_mul_single]
rw [MulOpposite.unop_mul (α := MonoidAlgebra k G), unop_op, unop_op, single_mul_single]
simp }

-- @[simp] -- Porting note (#10618): simp can prove this.
Expand Down Expand Up @@ -1517,8 +1515,7 @@ protected noncomputable def opRingEquiv [AddCommMonoid G] :
erw [AddEquiv.trans_apply, AddEquiv.trans_apply, AddEquiv.trans_apply,
MulOpposite.opAddEquiv_symm_apply]; rw [MulOpposite.unop_mul (α := k[G])]
dsimp
-- This was not needed before leanprover/lean4#2644
erw [mapRange_single, single_mul_single, mapRange_single, mapRange_single]
rw [mapRange_single, single_mul_single, mapRange_single, mapRange_single]
simp only [mapRange_single, single_mul_single, ← op_mul, add_comm] }

-- @[simp] -- Porting note (#10618): simp can prove this.
Expand Down
Loading