Hardness of Embedding Metric Spaces of Equal Size

  • Authors:
  • Subhash Khot;Rishi Saket

  • Affiliations:
  • Georgia Institute of Technology,;Georgia Institute of Technology,

  • Venue:
  • APPROX '07/RANDOM '07 Proceedings of the 10th International Workshop on Approximation and the 11th International Workshop on Randomization, and Combinatorial Optimization. Algorithms and Techniques
  • Year:
  • 2007

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Abstract

We study the problem embedding an n-point metric space into another n-point metric space while minimizing distortion. We show that there is no polynomial time algorithm to approximate the minimum distortion within a factor of 茂戮驴((logn)1/4 茂戮驴 茂戮驴) for any constant 茂戮驴 0, unless $\textnormal{NP} \subseteq \textnormal{DTIME}(n^{\textnormal{poly}(\log n))})$. We give a simple reduction from the METRIC LABELINGproblem which was shown to be inapproximable by Chuzhoy and Naor [10].