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DOI: 10.4230/LIPIcs.MFCS.2017.70
URN: urn:nbn:de:0030-drops-80740
URL: http://drops.dagstuhl.de/opus/volltexte/2017/8074/
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Bonamy, Marthe ; Dabrowski, Konrad K. ; Feghali, Carl ; Johnson, Matthew ; Paulusma, DaniŽl

Recognizing Graphs Close to Bipartite Graphs

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LIPIcs-MFCS-2017-70.pdf (0.5 MB)


Abstract

We continue research into a well-studied family of problems that ask if the vertices of a graph can be partitioned into sets A and B, where A is an independent set and B induces a graph from some specified graph class G. We let G be the class of k-degenerate graphs. The problem is known to be polynomial-time solvable if k=0 (bipartite graphs) and NP-complete if k=1 (near-bipartite graphs) even for graphs of diameter 4, as shown by Yang and Yuan, who also proved polynomial-time solvability for graphs of diameter 2. We show that recognizing near-bipartite graphs of diameter 3 is NP-complete resolving their open problem. To answer another open problem, we consider graphs of maximum degree D on n vertices. We show how to find A and B in O(n) time for k=1 and D=3, and in O(n^2) time for k >= 2 and D >= 4. These results also provide an algorithmic version of a result of Catlin [JCTB, 1979] and enable us to complete the complexity classification of another problem: finding a path in the vertex colouring reconfiguration graph between two given k-colourings of a graph of bounded maximum degree.

BibTeX - Entry

@InProceedings{bonamy_et_al:LIPIcs:2017:8074,
  author =	{Marthe Bonamy and Konrad K. Dabrowski and Carl Feghali and Matthew Johnson and Dani{\"e}l Paulusma},
  title =	{{Recognizing Graphs Close to Bipartite Graphs}},
  booktitle =	{42nd International Symposium on Mathematical Foundations of Computer Science (MFCS 2017)},
  pages =	{70:1--70:14},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-046-0},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{83},
  editor =	{Kim G. Larsen and Hans L. Bodlaender and Jean-Francois Raskin},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2017/8074},
  URN =		{urn:nbn:de:0030-drops-80740},
  doi =		{10.4230/LIPIcs.MFCS.2017.70},
  annote =	{Keywords: degenerate graphs, near-bipartite graphs, reconfiguration graphs}
}

Keywords: degenerate graphs, near-bipartite graphs, reconfiguration graphs
Seminar: 42nd International Symposium on Mathematical Foundations of Computer Science (MFCS 2017)
Issue Date: 2017
Date of publication: 22.11.2017


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