Variants of the Shortest Path Problem

  • The shortest path problem in which the \((s,t)\)-paths \(P\) of a given digraph \(G =(V,E)\) are compared with respect to the sum of their edge costs is one of the best known problems in combinatorial optimization. The paper is concerned with a number of variations of this problem having different objective functions like bottleneck, balanced, minimum deviation, algebraic sum, \(k\)-sum and \(k\)-max objectives, \((k_1, k_2)-max, (k_1, k_2)\)-balanced and several types of trimmed-mean objectives. We give a survey on existing algorithms and propose a general model for those problems not yet treated in literature. The latter is based on the solution of resource constrained shortest path problems with equality constraints which can be solved in pseudo-polynomial time if the given graph is acyclic and the number of resources is fixed. In our setting, however, these problems can be solved in strongly polynomial time. Combining this with known results on \(k\)-sum and \(k\)-max optimization for general combinatorial problems, we obtain strongly polynomial algorithms for a variety of path problems on acyclic and general digraphs.

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Metadaten
Author:Lara Turner
URN (permanent link):urn:nbn:de:hbz:386-kluedo-27139
Parent Title (English):Variants of the Shortest Path Problem
Serie (Series number):Report in Wirtschaftsmathematik (WIMA Report) (140)
Document Type:Preprint
Language of publication:English
Publication Date:2011/08/24
Year of Publication:2011
Publishing Institute:Technische Universität Kaiserslautern
Tag:
Number of page:28
Faculties / Organisational entities:Fachbereich Mathematik
DDC-Cassification:510 Mathematik

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