On Compact Formulations for Integer Programs Solved by Column Generation

Daniel Villeneuve (), Jacques Desrosiers (), Marco Lübbecke () and François Soumis ()

Annals of Operations Research, 2005, vol. 139, issue 1, 375-388

Abstract: Column generation has become a powerful tool in solving large scale integer programs. It is well known that most of the often reported compatibility issues between pricing subproblem and branching rule disappear when branching decisions are based on imposing constraints on the subproblem's variables. This can be generalized to branching on variables of a so-called compact formulation. We constructively show that such a formulation always exists under mild assumptions. It has a block diagonal structure with identical subproblems, each of which contributes only one column in an integer solution. This construction has an interpretation as reversing a Dantzig-Wolfe decomposition. Our proposal opens the way for the development of branching rules adapted to the subproblem's structure and to the linking constraints. Copyright Springer Science + Business Media, Inc. 2005

Keywords: integer programming; column generation; branch-and-bound (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (4)

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DOI: 10.1007/s10479-005-3455-9

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