Boolean function monotonicity testing requires (almost) $n^{1/2}$ queries

November 06, 2025 ยท The Ethereal ยท ๐Ÿ› arXiv.org

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Authors Mark Chen, Xi Chen, Hao Cui, William Pires, Jonah Stockwell arXiv ID 2511.04558 Category cs.CC: Computational Complexity Cross-listed cs.DM, cs.DS Citations 1 Venue arXiv.org Last Checked 6 months ago
Abstract
We show that for any constant $c>0$, any (two-sided error) adaptive algorithm for testing monotonicity of Boolean functions must have query complexity $ฮฉ(n^{1/2-c})$. This improves the $\tildeฮฉ(n^{1/3})$ lower bound of [CWX17] and almost matches the $\tilde{O}(\sqrt{n})$ upper bound of [KMS18].
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