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.
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Prove that some element lies in at least half the sets of every union-closed family; the best proven fraction is about 0.38.
选两个分支看看改了什么,再发起 PR 把工作带过去。
PR 可以从任何一个分支合入任何另一个分支。