Mathlib v3 is deprecated. Go to Mathlib v4

Theorem subsemigroup.comap_injective_of_surjective

Modification history

2022-04-26 18:41
src/group_theory/subsemigroup/operations.lean
feat(group_theory/subsemigroup/operations): port from submonoid (#12112) …
Added subsemigroup.comap_injective_of_surjectiveView on Github →