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The k-set problem: how many halving lines can n points have?
Find the maximum number of k-sets and halving lines of n points in the plane; the known bounds are barely superlinear and O(n^4/3).
PR
PR 把工作从一条路线带到另一条；合并它就是采纳。
没有开放的 PR
PR 把工作从一个分支带到另一个分支。