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Theorem filter.mem_iff_ultrafilter

Modification history

2022-05-12 12:10
src/order/filter/ultrafilter.lean
feat({data/{finset,set},order/filter}/pointwise): Pointwise monoids are division monoids (#13900) …
Modified filter.mem_iff_ultrafilterView on Github →
2020-12-10 13:58
src/order/filter/ultrafilter.lean
refactor(order/filter/ultrafilter): drop `filter.is_ultrafilter` (#5264) …
Modified filter.mem_iff_ultrafilterView on Github →
2020-10-08 22:15
src/order/filter/ultrafilter.lean
feat(topology/basic): add `is_open_iff_ultrafilter` (#4529) …
Added filter.mem_iff_ultrafilterView on Github →