Lifting theorems and facet characterization for a class of clique partitioning inequalities

  • Authors:
  • Hans-JüRgen Bandelt;Maarten Oosten;Jeroen H. G. C. Rutten;Frits C. R. Spieksma

  • Affiliations:
  • Mathematisches Seminar, Universität Hamburg, Bundesstr. 55, D-20146 Hamburg, Germany;Faculty of Commerce and Business Administration, 2053 Main Mall, Vancouver, BC, Canada V6T 1Z2;ASM Lithography, P.O. Box 324, NL-5500 AH Veldhoven, The Netherlands;Department of Mathematics, Maastricht University, P.O. Box 616, NL-6200 MD Maastricht, The Netherlands

  • Venue:
  • Operations Research Letters
  • Year:
  • 1999

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Abstract

In this paper we prove two lifting theorems for the clique partitioning polytope, which provide sufficient conditions for a valid inequality to be facet-defining. In particular, if a valid inequality defines a facet of the polytope corresponding to the complete graph K"m on m vertices, it defines a facet for the polytope corresponding to K"n for all nm. This answers a question raised by Grotschel and Wakabayashi. Further, for the case of arbitrary graphs, we characterize when the so-called 2-partition inequalities define facets.