Theorem Finset.card_eraseNone_of_not_mem

Modification history

2026-09-29 11:08
Mathlib/Data/Finset/Option.lean
chore: rename remaining `not_mem` declarations to `notMem` (#44296) …
Deleted Finset.card_eraseNone_of_not_memView on Github →
2025-08-24 17:49
Mathlib/Data/Finset/Option.lean
feat(Finset/Option): add lemmas about `#s.eraseNone` (#28839)
Added Finset.card_eraseNone_of_not_memView on Github →