On H-Topological Intersection Graphs

Steven Chaplick, Martin Töpfer, Jan Voborník, Peter Zeman*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingAcademicpeer-review


Biro, Hujter, and Tuza introduced the concept of H-graphs (1992), intersection graphs of connected subgraphs of a subdivision of a graph H. They naturally generalize many important classes of graphs, e.g., interval graphs and circular-arc graphs. Our paper is the first study of the recognition and dominating set problems of this large collection of intersection classes of graphs.We negatively answer the question of Biro, Hujter, and Tuza who asked whether H-graphs can be recognized in polynomial time, for a fixed graph H. Namely, we show that recognizing H-graphs is NP-complete if H contains the diamond graph as a minor. On the other hand, for each tree T, we give a polynomial-time algorithm for recognizing T-graphs and an O(n(4))-time algorithm for recognizing K-1,K-d-graphs. For the dominating set problem (parameterized by the size of H), we give FPT- and XP-time algorithms on K-1, d-graphs and H-graphs, respectively. Our dominating set algorithm for H-graphs also provides XP-time algorithms for the independent set and independent dominating set problems on H-graphs.
Original languageEnglish
Title of host publicationGraph-Theoretic Concepts in Computer Science. WG 2017
EditorsH. Bodlaender, G. Woeginger
PublisherSpringer, Cham
Publication statusPublished - 2017
Externally publishedYes

Publication series

SeriesLecture Notes in Computer Science

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