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DOI: 10.4230/LIPIcs.STACS.2009.1816
An Approximation Algorithm for l_infinity Fitting Robinson Structures to Distances

Authors: Victor Chepoi and Morgan Seston

Published in: LIPIcs, Volume 3, 26th International Symposium on Theoretical Aspects of Computer Science (2009)

Abstract
In this paper, we present a factor 16 approximation algorithm for the following NP-hard distance fitting problem: given a finite set $X$ and a distance $d$ on $X$, find a Robinsonian distance $d_R$ on $X$ minimizing the $l_{\infty}$-error $||d-d_R||_{\infty}=\mbox{max}_{x,y\in X}\{ |d(x,y)-d_R(x,y)|\}.$ A distance $d_R$ on a finite set $X$ is Robinsonian if its matrix can be symmetrically permuted so that its elements do not decrease when moving away from the main diagonalalong any row or column. Robinsonian distances generalize ultrametrics, line distances and occur in the seriation problems and in classification.
Cite as

Victor Chepoi and Morgan Seston. An Approximation Algorithm for l_infinity Fitting Robinson Structures to Distances. In 26th International Symposium on Theoretical Aspects of Computer Science. Leibniz International Proceedings in Informatics (LIPIcs), Volume 3, pp. 265-276, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2009)

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@InProceedings{chepoi_et_al:LIPIcs.STACS.2009.1816,
  author =	{Chepoi, Victor and Seston, Morgan},
  title =	{{An Approximation Algorithm for l\underlineinfinity Fitting Robinson Structures to Distances}},
  booktitle =	{26th International Symposium on Theoretical Aspects of Computer Science},
  pages =	{265--276},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-09-5},
  ISSN =	{1868-8969},
  year =	{2009},
  volume =	{3},
  editor =	{Albers, Susanne and Marion, Jean-Yves},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.STACS.2009.1816},
  URN =		{urn:nbn:de:0030-drops-18167},
  doi =		{10.4230/LIPIcs.STACS.2009.1816},
  annote =	{Keywords: Robinsonian dissimilarity, Approximation algorithm, Fitting problem}
}
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