Volume distortion for subsets of Euclidean spaces: extended abstract

  • Authors:
  • James R. Lee

  • Affiliations:
  • Institute for Advanced Study

  • Venue:
  • Proceedings of the twenty-second annual symposium on Computational geometry
  • Year:
  • 2006

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Abstract

In [Rao 1999], it is shown that every n-point Euclidean metric with polynomial aspect ratio admits a Euclidean embedding with k-dimensional distortion at most O(√log n log k), a result which is tight for constant values of k. We show that this holds without any assumption on the aspect ratio, and give an improved bound of O(√log n (log k)1/4). Our main result is an upper bound of O(√log n log log n) independent of the value of k, nearly resolving the main open questions of [Dunagan-Vempala 2001] and [Krauthgamer-Linial-Magen 2004]. The best previous bound was O(log n), and our bound is nearly tight, as even the 2-dimensional volume distortion of an n-vertex path is Ω(√log n).