∫ Утверждение Mathlib
instPartialOrderOpenNormalSubgroup
Mathlib.Topology.Algebra.OpenSubgroup
URI: https://scilib.ai/kg/mathlib#OpenNormalSubgroup.instPartialOrderOpenNormalSubgroup
∫ Утверждение Mathlib
Mathlib.Topology.Algebra.OpenSubgroup
URI: https://scilib.ai/kg/mathlib#OpenNormalSubgroup.instPartialOrderOpenNormalSubgroup