∫ Утверждение Mathlib
singleton_mem_nhds_of_units
Mathlib.Topology.Algebra.WithZeroTopology
URI: https://scilib.ai/kg/mathlib#WithZeroTopology.singleton_mem_nhds_of_units
∫ Утверждение Mathlib
Mathlib.Topology.Algebra.WithZeroTopology
URI: https://scilib.ai/kg/mathlib#WithZeroTopology.singleton_mem_nhds_of_units