Def Contravariant.toRightCancelSemigroup

Modification history

2026-03-30 17:54
Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean
chore(Algebra/Order/Monoid/Unbundled/Basic): replace `mul_left_cancel''` with an `IsLeftCancelMul` instance (#36629)
Modified Contravariant.toRightCancelSemigroupView on Github →
2024-10-24 21:25
Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean
feat: use aliases for `CovariantClass α α (· * ·) (· ≤ ·)` etc (#13154)
Modified Contravariant.toRightCancelSemigroupView on Github →
2022-11-20 09:01
Mathlib/Algebra/Order/Monoid/Lemmas.lean
feat: port algebra.order.monoid.lemmas (#608) …
Added Contravariant.toRightCancelSemigroupView on Github →