Theorem Equiv.Perm.preimage_inv

Modification history

2025-11-18 22:57
Mathlib/GroupTheory/Perm/Basic.lean
refactor: make `⇑e⁻¹ = ⇑e.symm` simp (#27433) …
Modified Equiv.Perm.preimage_invView on Github →
2023-01-12 22:49
Mathlib/GroupTheory/Perm/Basic.lean
feat: `∘` lemmas (#1347) …
Added Equiv.Perm.preimage_invView on Github →