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Frankl's union-closed sets conjecture
Prove that some element lies in at least half the sets of every union-closed family; the best proven fraction is about 0.38.
PR
PR 把工作从一条路线带到另一条；合并它就是采纳。
新建 PR
Prove that some element lies in at least half the sets of every union-closed family; the best proven fraction is about 0.38.
PR 把工作从一条路线带到另一条；合并它就是采纳。