∫ Утверждение Mathlib
isMulCommutative
Mathlib.GroupTheory.Subgroup.Center
URI: https://scilib.ai/kg/mathlib#Subgroup.center.isMulCommutative
∫ Утверждение Mathlib
Mathlib.GroupTheory.Subgroup.Center
URI: https://scilib.ai/kg/mathlib#Subgroup.center.isMulCommutative