License: Creative Commons Attribution 4.0 International license (CC BY 4.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.ISAAC.2022.38
URN: urn:nbn:de:0030-drops-173239
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Cicalese, Ferdinando ; Dallard, Clément ; Milanič, Martin

On Constrained Intersection Representations of Graphs and Digraphs

LIPIcs-ISAAC-2022-38.pdf (0.7 MB)


We study the problem of determining minimal directed intersection representations of DAGs in a model introduced by [Kostochka, Liu, Machado, and Milenkovic, ISIT2019]: vertices are assigned color sets, two vertices are connected by an arc if and only if they share at least one color and the tail vertex has a strictly smaller color set than the head, and the goal is to minimize the total number of colors. We show that the problem is polynomially solvable in the class of triangle-free and Hamiltonian DAGs and also disclose the relationship of this problem with several other models of intersection representations of graphs and digraphs.

BibTeX - Entry

  author =	{Cicalese, Ferdinando and Dallard, Cl\'{e}ment and Milani\v{c}, Martin},
  title =	{{On Constrained Intersection Representations of Graphs and Digraphs}},
  booktitle =	{33rd International Symposium on Algorithms and Computation (ISAAC 2022)},
  pages =	{38:1--38:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-258-7},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{248},
  editor =	{Bae, Sang Won and Park, Heejin},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-173239},
  doi =		{10.4230/LIPIcs.ISAAC.2022.38},
  annote =	{Keywords: Directed intersection representation, intersection number}

Keywords: Directed intersection representation, intersection number
Collection: 33rd International Symposium on Algorithms and Computation (ISAAC 2022)
Issue Date: 2022
Date of publication: 14.12.2022

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