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When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.ISAAC.2018.49
URN: urn:nbn:de:0030-drops-99970
URL: http://drops.dagstuhl.de/opus/volltexte/2018/9997/
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Bouts, Quirijn ; Castermans, Thom ; van Goethem, Arthur ; van Kreveld, Marc ; Meulemans, Wouter

Competitive Searching for a Line on a Line Arrangement

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LIPIcs-ISAAC-2018-49.pdf (0.7 MB)


Abstract

We discuss the problem of searching for an unknown line on a known or unknown line arrangement by a searcher S, and show that a search strategy exists that finds the line competitively, that is, with detour factor at most a constant when compared to the situation where S has all knowledge. In the case where S knows all lines but not which one is sought, the strategy is 79-competitive. We also show that it may be necessary to travel on Omega(n) lines to realize a constant competitive ratio. In the case where initially, S does not know any line, but learns about the ones it encounters during the search, we give a 414.2-competitive search strategy.

BibTeX - Entry

@InProceedings{bouts_et_al:LIPIcs:2018:9997,
  author =	{Quirijn Bouts and Thom Castermans and Arthur van Goethem and Marc van Kreveld and Wouter Meulemans},
  title =	{{Competitive Searching for a Line on a Line Arrangement}},
  booktitle =	{29th International Symposium on Algorithms and Computation  (ISAAC 2018)},
  pages =	{49:1--49:12},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-094-1},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{123},
  editor =	{Wen-Lian Hsu and Der-Tsai Lee and Chung-Shou Liao},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2018/9997},
  URN =		{urn:nbn:de:0030-drops-99970},
  doi =		{10.4230/LIPIcs.ISAAC.2018.49},
  annote =	{Keywords: Competitive searching, line arrangement, detour factor, search strategy}
}

Keywords: Competitive searching, line arrangement, detour factor, search strategy
Seminar: 29th International Symposium on Algorithms and Computation (ISAAC 2018)
Issue Date: 2018
Date of publication: 27.11.2018


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