Def Contravariant.toLeftCancelSemigroup

Modification history

2024-10-24 21:25
Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean
feat: use aliases for `CovariantClass α α (· * ·) (· ≤ ·)` etc (#13154)
Modified Contravariant.toLeftCancelSemigroupView on Github →
2022-11-20 09:01
Mathlib/Algebra/Order/Monoid/Lemmas.lean
feat: port algebra.order.monoid.lemmas (#608) …
Added Contravariant.toLeftCancelSemigroupView on Github →