Theorem not_isNotUnital_iff_isUnital

Modification history

2026-08-20 19:44
Mathlib/Algebra/Group/Defs.lean
refactor(Algebra/Group): split overlong file Defs.lean (#42952) …
Modified not_isNotUnital_iff_isUnitalView on Github →
2026-08-13 09:59
Mathlib/Algebra/Group/Defs.lean
feat(Algebra): `IsUnital` and `IsNotUnital` classes (#41923) …
Added not_isNotUnital_iff_isUnitalView on Github →