Djeumou Fomeni, Franklin and Kaparis, Konstantinos and Letchford, Adam (2022) A cut-and-branch algorithm for the quadratic knapsack problem. Discrete Optimization, 44 (2). ISSN 1572-5286
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Abstract
The Quadratic Knapsack Problem (QKP) is a well-known NP-hard combinatorial optimisation problem, with many practical applications. We present a ‘cut-and-branch’ algorithm for the QKP, in which a cutting-plane phase is followed by a branch-and-bound phase. The cutting-plane phase is more sophisticated than the existing ones in the literature, incorporating several classes of cutting planes, two primal heuristics, and several rules for eliminating variables and constraints. Computational results show that the algorithm is competitive.