∫ Утверждение Mathlib
formPerm_apply_of_notMem
Mathlib.GroupTheory.Perm.List
URI: https://scilib.ai/kg/mathlib#List.formPerm_apply_of_notMem
∫ Утверждение Mathlib
Mathlib.GroupTheory.Perm.List
URI: https://scilib.ai/kg/mathlib#List.formPerm_apply_of_notMem