Theorem TopologicalSpace.IsOpenCover.isLocallyClosed_iff_coe_preimage

Modification history

2025-02-28 16:03
Mathlib/Topology/LocalAtTarget.lean
feat(Topology/Sets): define open covers (#21442)
Added TopologicalSpace.IsOpenCover.isLocallyClosed_iff_coe_preimageView on Github →