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Theorem finset.ssubset_iff_exists_subset_erase

Modification history

2022-03-01 17:25
src/data/finset/basic.lean
feat(combinatorics/set_family/lym): Lubell-Yamamoto-Meshalkin inequalities (#11248) …
Added finset.ssubset_iff_exists_subset_eraseView on Github →