Mathlib Changelog
v4
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Theorem
eq_open_union_countable
Modification history
2026-01-21 19:37
Mathlib/Topology/Compactness/Lindelof.lean
feat(HereditarilyLindelof): review and expand API (#33897)
Modified
eq_open_union_countable
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2024-01-19 10:45
Mathlib/Topology/Compactness/Lindelof.lean
feat: add Lindelöf spaces and sets (#9107) …
Added
eq_open_union_countable
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