Theorem Equiv.Perm.perm_symm_mapsTo_iff_mapsTo

Modification history

2025-11-18 22:57
Mathlib/GroupTheory/Perm/Finite.lean
refactor: make `⇑e⁻¹ = ⇑e.symm` simp (#27433) …
Added Equiv.Perm.perm_symm_mapsTo_iff_mapsToView on Github →