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arxiv: 1806.05737 · v2 · pith:NLY3GZH7new · submitted 2018-06-14 · 🧮 math.CO · cs.CG· cs.DM· cs.LG

A Sauer-Shelah-Perles Lemma for Sumsets

classification 🧮 math.CO cs.CGcs.DMcs.LG
keywords triangleanalogousargumentbiglbigrcrootdifferencedimension
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We show that any family of subsets $A\subseteq 2^{[n]}$ satisfies $\lvert A\rvert \leq O\bigl(n^{\lceil{d}/{2}\rceil}\bigr)$, where $d$ is the VC dimension of $\{S\triangle T \,\vert\, S,T\in A\}$, and $\triangle$ is the symmetric difference operator. We also observe that replacing $\triangle$ by either $\cup$ or $\cap$ fails to satisfy an analogous statement. Our proof is based on the polynomial method; specifically, on an argument due to [Croot, Lev, Pach '17].

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