License: Creative Commons Attribution 4.0 International license (CC BY 4.0)
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DOI: 10.4230/LIPIcs.SoCG.2021.29
URN: urn:nbn:de:0030-drops-138281
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Davies, James ; Krawczyk, Tomasz ; McCarty, Rose ; Walczak, Bartosz

Colouring Polygon Visibility Graphs and Their Generalizations

LIPIcs-SoCG-2021-29.pdf (0.7 MB)


Curve pseudo-visibility graphs generalize polygon and pseudo-polygon visibility graphs and form a hereditary class of graphs. We prove that every curve pseudo-visibility graph with clique number ω has chromatic number at most 3⋅4^{ω-1}. The proof is carried through in the setting of ordered graphs; we identify two conditions satisfied by every curve pseudo-visibility graph (considered as an ordered graph) and prove that they are sufficient for the claimed bound. The proof is algorithmic: both the clique number and a colouring with the claimed number of colours can be computed in polynomial time.

BibTeX - Entry

  author =	{Davies, James and Krawczyk, Tomasz and McCarty, Rose and Walczak, Bartosz},
  title =	{{Colouring Polygon Visibility Graphs and Their Generalizations}},
  booktitle =	{37th International Symposium on Computational Geometry (SoCG 2021)},
  pages =	{29:1--29:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-184-9},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{189},
  editor =	{Buchin, Kevin and Colin de Verdi\`{e}re, \'{E}ric},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-138281},
  doi =		{10.4230/LIPIcs.SoCG.2021.29},
  annote =	{Keywords: Visibility graphs, \chi-boundedness, pseudoline arrangements, ordered graphs}

Keywords: Visibility graphs, χ-boundedness, pseudoline arrangements, ordered graphs
Collection: 37th International Symposium on Computational Geometry (SoCG 2021)
Issue Date: 2021
Date of publication: 02.06.2021

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