Clique separator decomposition of hole-free and diamond-free graphs and algorithmic consequences

  • Authors:
  • Andreas Brandstädt;Vassilis Giakoumakis;Frédéric Maffray

  • Affiliations:
  • Fachbereich Informatik, Universität Rostock, A.-Einstein-Str. 21, D-18051 Rostock, Germany;MIS (Modélisation, Information & Systèèmes), Université de Picardie Jules Verne, Amiens, France;C.N.R.S., Laboratoire G-SCOP, Grenoble-INP, Université Joseph Fourier, Grenoble Cedex, France

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2012

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Abstract

Clique separator decomposition, introduced by Whitesides and Tarjan, is one of the most important graph decompositions. A hole is a chordless cycle with at least five vertices. A paraglider is a graph with five vertices a,b,c,d,e and edges ab,ac,bc,bd,cd,ae,de. We show that every (hole, paraglider)-free graph admits a clique separator decomposition into graphs of three very specific types. This yields efficient algorithms for various optimization problems in this class of graphs.