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Acyclic Orientations with Path Constraints

Published online by Cambridge University Press:  04 April 2009

Rosa M. V. Figueiredo ,
Valmir C. Barbosa ,
Nelson Maculan  and
Cid C. de Souza
Rosa M. V. Figueiredo
Affiliation:
Universidade do Estado do Rio de Janeiro, Instituto de Matemática e Estatística, 20550-900 Rio de Janeiro - RJ, Brazil; rosa@ime.uerj.br
Valmir C. Barbosa
Affiliation:
Universidade Federal do Rio de Janeiro, Programa de Engenharia de Sistemas e Computação, COPPE, Caixa Postal 68511, 21941-972 Rio de Janeiro - RJ, Brazil; valmir@cos.ufrj.br maculan@cos.ufrj.br
Nelson Maculan
Affiliation:
Universidade Federal do Rio de Janeiro, Programa de Engenharia de Sistemas e Computação, COPPE, Caixa Postal 68511, 21941-972 Rio de Janeiro - RJ, Brazil; valmir@cos.ufrj.br maculan@cos.ufrj.br
Cid C. de Souza
Affiliation:
Universidade Estadual de Campinas, Instituto de Computação, Caixa Postal 6176, 13084-971 Campinas - SP, Brazil; cid@ic.unicamp.br
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Abstract

Many well-known combinatorial optimization problems can be stated over the set of acyclic orientationsof an undirected graph. For example, acyclic orientations with certain diameter constraints areclosely related to the optimal solutions of the vertex coloring and frequency assignment problems. In this paper we introduce a linear programming formulation of acyclic orientationswith path constraints, and discuss its use in the solution of the vertex coloring problem andsome versions of the frequency assignment problem. A study of the polytope associated with the formulation is presented, including proofs of which constraints of the formulation are facet-definingand the introduction of new classes of valid inequalities.

Keywords

Acyclic orientationspath constraintscombinatorial optimization problemsfacets of polyhedra.
Type
Research Article
Information
RAIRO - Operations Research , Volume 42 , Issue 4: ALIO/EURO V Conference on Combinatorial Optimization , October 2008 , pp. 455 - 467
Copyright
© EDP Sciences, ROADEF, SMAI, 2008

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