Facets of Special Knapsack Equality Polytopes

Eva K. Lee

May, 1993

Abstract:

The 0/1 knapsack equality polytope is, by definition, the convex hull of 0/1 solutions of a single linear equation. A special form of this polytope --- where the defining linear equation has nonnegative integer coefficients and the number of variables having coefficient one is greater than the right-hand-side --- is considered. Equality constraints of this form arose in a real-world application of integer programming to a truck dispatching scheduling problem. Families of facet defining inequalities for this polytope are identified, and in two cases a complete linear inequality representation is obtained.

Keywords: knapsack polytope, integer programming, polyhedral theory, branch-and-cut

Abbreviated title: Knapsack equality polytopes


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Lee, School of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0205. Supported in part by AFOSR Grant F49620-92-J-0053 while the author was at Rice University.

Eva Lee
Sun Jan 28 03:53:19 EST 1996