Approximately covering by cycles in planar graphs

  • Authors:
  • Dieter Rautenbach;Bruce Reed

  • Affiliations:
  • Equipe Combinatoire, Université Paris 6, 175 rue du Chevaleret, 75013 Paris, France;Equipe Combinatoire, Université Paris 6, 175 rue du Chevaleret, 75013 Paris, France

  • Venue:
  • SODA '01 Proceedings of the twelfth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2001

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Abstract

Let G = (V(G), E(G)) be a graph and let C be the collection of its cycles. Let p: E(G) ↣ Z+&Ogr;? be a non-negative, integer-valued function on its edge set.The CYCLE COVER PROBLEM is the optimization problem of finding a multiset a of cycles of G such that each edge e ∈ E is in at least p(e) of the cycles in a and such that the sum of the lengths of all cycles in a is minimum.We will show how to approximate within a factor of 8 the optimum value of the cycle cover problem for planar graphs in polynomial time.