Mathlib v3 is deprecated. Go to Mathlib v4

Theorem subsemigroup.mem_map_iff_mem

Modification history

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