Theorem TopologicalSpace.NonemptyCompacts.isOpen_subsets_of_isOpen

Modification history

2026-01-22 13:19
Mathlib/Topology/Sets/VietorisTopology.lean
feat(Topology/Sets): define the Vietoris topology on `(Nonempty)Compacts` (#31059) …
Added TopologicalSpace.NonemptyCompacts.isOpen_subsets_of_isOpenView on Github →