The quadratic 0–1 knapsack problem with series–parallel support

Abstract

We consider various special cases of the quadratic 0–1 knapsack problem (QKP) for which the underlying graph structure is fairly simple. For the variant with edge series–parallel graphs, we give a dynamic programming algorithm with pseudo-polynomial time complexity, and a fully polynomial time approximation scheme. In strong contrast to this, the variant with vertex series–parallel graphs is shown to be strongly NP-complete.