∫ Утверждение Mathlib
isOpen_iff_coe_preimage
Mathlib.Topology.LocalAtTarget
URI: https://scilib.ai/kg/mathlib#TopologicalSpace.IsOpenCover.isOpen_iff_coe_preimage
∫ Утверждение Mathlib
Mathlib.Topology.LocalAtTarget
URI: https://scilib.ai/kg/mathlib#TopologicalSpace.IsOpenCover.isOpen_iff_coe_preimage