Easily computable facets of the knapsack polytope
Mathematics of Operations Research
The complexity of lifted inequalities for the knapsack problem
Discrete Applied Mathematics
Software section: MINTO, a mixed INTeger optimizer
Operations Research Letters
An O(nlog n) procedure for identifying facets of the knapsack polytope
Operations Research Letters
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Facet-defining inequalities lifted from minimal covers are used as strong cutting planes in algorithms for solving 0-1 integer programming problems. In this paper we extend the result of Balas and Zemel by giving a set of inequalities that determines the lifting coefficients of facet-defining inequalities of the 0-1 knapsack polytope for any ordering of the variables to be lifted. We further generalize the result to obtain facet-defining inequalities for the 0-1 knapsack problem with generalized upper bound constraints.