Home > Research > Publications & Outputs > An application of the Lovasz-Schrijver M(K,K) o...

Electronic data

Links

Text available via DOI:

View graph of relations

An application of the Lovasz-Schrijver M(K,K) operator to the stable set problem

Research output: Contribution to journalJournal article

Published
Close
<mark>Journal publication date</mark>2009
<mark>Journal</mark>Mathematical Programming
Issue number2
Volume120
Number of pages21
Pages (from-to)381-401
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Although the lift-and-project operators of Lovász and Schrijver have been the subject of intense study, their M(K, K) operator has received little attention. We consider an application of this operator to the stable set problem. We begin with an initial linear programming (LP) relaxation consisting of clique and non-negativity inequalities, and then apply the operator to obtain a stronger extended LP relaxation. We discuss theoretical properties of the resulting relaxation, describe the issues that must be overcome to obtain an effective practical implementation, and give extensive computational results. Remarkably, the upper bounds obtained are sometimes stronger than those obtained with semidefinite programming techniques.