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An alternative explanation of disjunctive formulations

Williams, H. Paul (1994) An alternative explanation of disjunctive formulations. European Journal of Operational Research, 72 (1). pp. 200-203. ISSN 0377-2217

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Identification Number: 10.1016/0377-2217(94)90341-7


The purpose of this paper is to explain the property of Disjunctive Formulations for Mixed Integer Programmes in a simpler way, relying on the Linear Programme (LP) definition of a dual. Disjunctive Formulations are contrasted with standard formulations. They have proved a very powerful way of modelling Integer Programmes. If a ‘complete’ disjunctive formulation is carried out we have a model whose LP Relaxation yields an integer solution. It is shown that a Disjunctive Formulation has a natural dual which is an LP. Therefore the dual of the dual is an LP representation of the original Disjunctive Model. It is in fact a Disjunctive Formulation.

Item Type: Article
Official URL:
Additional Information: © 1994 Elsevier B.V.
Divisions: Management
Subjects: Q Science > QA Mathematics
Date Deposited: 24 Jan 2011 15:10
Last Modified: 17 Feb 2021 11:05

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