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Theorem set.nonempty.not_subset_empty

Modification history

2021-01-27 18:19
src/data/set/basic.lean
refactor(data/set/basic): simpler proofs (#5920) …
Modified set.nonempty.not_subset_emptyView on Github →
2020-02-06 09:12
src/data/set/basic.lean
feat(*): a few simple lemmas (#1965)
Added set.nonempty.not_subset_emptyView on Github →