Theorem Finset.card_union_of_disjoint

Modification history

2024-02-13 11:24
Mathlib/Data/Finset/Card.lean
feat: Add `Finset.card_union_eq_card_add_card` and golf (#10471)
Deleted Finset.card_union_of_disjointView on Github →
2024-02-11 21:58
Mathlib/Data/Finset/Card.lean
feat: `(s ∩ t).card = s.card + t.card - (s ∪ t).card` (#10224) …
Added Finset.card_union_of_disjointView on Github →