Mathlib v3 is deprecated. Go to Mathlib v4

Theorem multiset.count_filter

Modification history

2021-12-06 19:23
src/data/multiset/basic.lean
feat(data/multiset): add some lemmas about filter (eq x) (#10626)
Added multiset.count_filterView on Github →
2020-10-02 20:49
src/data/multiset/basic.lean
feat(data/multiset): ordered sum lemmas (#4305) …
Deleted multiset.count_filterView on Github →
2018-08-15 20:22
data/multiset.lean
feat(data/multiset): count_filter
Added multiset.count_filterView on Github →