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Theorem ultrafilter_comap_pure_nhds

Modification history

2020-12-10 13:58
src/topology/stone_cech.lean
refactor(order/filter/ultrafilter): drop `filter.is_ultrafilter` (#5264) …
Modified ultrafilter_comap_pure_nhdsView on Github →
2019-11-12 11:23
src/topology/stone_cech.lean
style(*): use notation `𝓝` for `nhds` (#1582) …
Modified ultrafilter_comap_pure_nhdsView on Github →
2018-11-05 09:43
analysis/topology/stone_cech.lean
feat(order/filter): ultrafilter monad and the Stone-Cech compactification (#434) …
Added ultrafilter_comap_pure_nhdsView on Github →