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arXiv · 2512.08619

New Constructions of SSPDs and their Applications

Mohammad A. Abam·Sariel Har-Peled
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Abstract

$\renewcommand{\Re}{\mathbb{R}}$We present a new optimal construction of a semi-separated pair decomposition (i.e., SSPD) for a set of $n$ points in $\Re^d$. In the new construction each point participates in a few pairs, and it extends easily to spaces with low doubling dimension. This is the first optimal construction with these properties. As an application of the new construction, for a fixed $t>1$, we present a new construction of a $t$-spanner with $O(n)$ edges and maximum degree $O(\log^2 n)$ that has a separator of size $O\pth{n^{1-1/d}}$.

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Mohammad A. Abam, Sariel Har-Peled. 2025-12-09. New Constructions of SSPDs and their Applications. https://doi.org/10.1016/j.comgeo.2011.12.003

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