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DOI: 10.4230/LIPIcs.SoCG.2018.39
URN: urn:nbn:de:0030-drops-87527
URL: http://drops.dagstuhl.de/opus/volltexte/2018/8752/
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Fulek, Radoslav ; Kyncl, Jan

Hanani-Tutte for Approximating Maps of Graphs

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LIPIcs-SoCG-2018-39.pdf (0.7 MB)


Abstract

We resolve in the affirmative conjectures of A. Skopenkov and Repovs (1998), and M. Skopenkov (2003) generalizing the classical Hanani-Tutte theorem to the setting of approximating maps of graphs on 2-dimensional surfaces by embeddings. Our proof of this result is constructive and almost immediately implies an efficient algorithm for testing whether a given piecewise linear map of a graph in a surface is approximable by an embedding. More precisely, an instance of this problem consists of (i) a graph G whose vertices are partitioned into clusters and whose inter-cluster edges are partitioned into bundles, and (ii) a region R of a 2-dimensional compact surface M given as the union of a set of pairwise disjoint discs corresponding to the clusters and a set of pairwise disjoint "pipes" corresponding to the bundles, connecting certain pairs of these discs. We are to decide whether G can be embedded inside M so that the vertices in every cluster are drawn in the corresponding disc, the edges in every bundle pass only through its corresponding pipe, and every edge crosses the boundary of each disc at most once.

BibTeX - Entry

@InProceedings{fulek_et_al:LIPIcs:2018:8752,
  author =	{Radoslav Fulek and Jan Kyncl},
  title =	{{Hanani-Tutte for Approximating Maps of Graphs}},
  booktitle =	{34th International Symposium on Computational Geometry (SoCG 2018)},
  pages =	{39:1--39:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-066-8},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{99},
  editor =	{Bettina Speckmann and Csaba D. T{\'o}th},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2018/8752},
  URN =		{urn:nbn:de:0030-drops-87527},
  doi =		{10.4230/LIPIcs.SoCG.2018.39},
  annote =	{Keywords: Hanani-Tutte theorem, graph embedding, map approximation, weak embedding, clustered planarity}
}

Keywords: Hanani-Tutte theorem, graph embedding, map approximation, weak embedding, clustered planarity
Seminar: 34th International Symposium on Computational Geometry (SoCG 2018)
Issue Date: 2018
Date of publication: 24.05.2018


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