Theorem TopologicalSpace.isOpen_unionₛ_countable

Modification history

2023-05-14 07:05
Mathlib/Topology/Bases.lean
chore: Rename to `sSup`/`iSup` (#3938) …
Deleted TopologicalSpace.isOpen_unionₛ_countableView on Github →
2023-02-01 00:30
Mathlib/Topology/Bases.lean
feat: port Topology.Bases (#1910)
Added TopologicalSpace.isOpen_unionₛ_countableView on Github →