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arxiv: 2009.09327 · v2 · pith:XESBDTEZ · submitted 2020-09-20 · math.CO · cs.DM

Note on Sunflowers

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classification math.CO cs.DM
keywords sunflowernotepetalssetssufficesalweissboundbreakthrough
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A sunflower with p petals consists of p sets whose pairwise intersections are identical. The goal of the sunflower problem is to find the smallest r=r(p,k) such that any family of r^k distinct k-element sets contains a sunflower with p petals. Building upon a breakthrough of Alweiss, Lovett, Wu and Zhang from 2019, Rao proved that r=O(p log(pk)) suffices; this bound was reproved by Tao in 2020. In this short note we record that r=O(p log k) suffices, by using a minor variant of the probabilistic part of these recent proofs.

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