Induced Matchings in Regular Graphs and Trees

  • Authors:
  • Michele Zito

  • Affiliations:
  • -

  • Venue:
  • WG '99 Proceedings of the 25th International Workshop on Graph-Theoretic Concepts in Computer Science
  • Year:
  • 1999

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Abstract

This paper studies the complexity of the Maximum Induced Matching problem (MIM) in regular graphs and trees. We show that the largest induced matchings in a regular graph of degree d can be approximated with a performance ratio less than d. However MIM is NP-hard to approximate within some constant c 1 even if the input is restricted to various classes of bounded degree and regular graphs. Finally we describe a simple algorithm providing a linear time optimal solution to MIM if the input graph is a tree.