Theorem IsUnit.inv

Modification history

2024-01-09 09:25
Mathlib/Algebra/Group/Units.lean
feat: `a / b = c / d ↔ a * d = c * b` when `b`, `d` commute (#9389) …
Modified IsUnit.invView on Github →
2022-12-03 03:40
Mathlib/Algebra/Hom/Units.lean
feat: port Algebra.Hom.Units (#745) …
Added IsUnit.invView on Github →