Quadratic Assignment Polytopes
In this chapter we present various results and partial results on the facial structure of the quadratic assignment polytope QAP n and its symmetric relative, the polytope SQP n . We address primarily the questions of finding the affine hull and the dimension of the respective polytopes, but give also some valid inequalities for QAP n . Some of these problems are left open and suggested in the form of conjectures for future work on this difficult, but interesting class of combinatorial optimization problems.
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