∫ Утверждение Mathlib
OpenNhds
Mathlib.Topology.Category.TopCat.OpenNhds
URI: https://scilib.ai/kg/mathlib#TopologicalSpace.OpenNhds
∫ Утверждение Mathlib
Mathlib.Topology.Category.TopCat.OpenNhds
URI: https://scilib.ai/kg/mathlib#TopologicalSpace.OpenNhds