Theorem isLindelof_open_iff_eq_countable_iUnion_of_isTopologicalBasis

Modification history

2024-01-19 10:45
Mathlib/Topology/Compactness/Lindelof.lean
feat: add Lindelöf spaces and sets (#9107) …
Added isLindelof_open_iff_eq_countable_iUnion_of_isTopologicalBasisView on Github →