  # [BE07] Using a Mixed Integer Quadratic Programming Solver for the Unconstrained Quadratic 0-1 Problem

Revue Internationale avec comité de lecture : Journal Mathematical Programming, vol. 109(1), pp. 55-68, 2007, (doi:10.1007/s10107-005-0637-9)

Mots clés: Integer programming - Quadratic 0-1 optimization - Convex quadratic relaxation - Semidefinite positive relaxation - Experiments - Max-cut

Résumé: Abstract In this paper, we consider problem (P) of minimizing a quadratic function q(x)=x t Qx+c t x of binary variables. Our main idea is to use the recent Mixed Integer Quadratic Programming (MIQP) solvers. But, for this, we have to first convexify the objective function q(x). A classical trick is to raise up the diagonal entries of Q by a vector u until (Q+diag(u)) is positive semidefinite. Then, using the fact that x i 2=x i, we can obtain an equivalent convex objective function, which can then be handled by an MIQP solver. Hence, computing a suitable vector u constitutes a preprocessing phase in this exact solution method. We devise two different preprocessing methods. The first one is straightforward and consists in computing the smallest eigenvalue of Q. In the second method, vector u is obtained once a classical SDP relaxation of (P) is solved. We carry out computational tests using the generator of (Pardalos and Rodgers, 1990) and we compare our two solution methods to several other exact solution methods. Furthermore, we report computational results for the max-cut problem.

Commentaires: note

Equipe: oc

# BibTeX

 @article { BE07, title = "{Using a Mixed Integer Quadratic Programming Solver for the Unconstrained Quadratic 0-1 Problem}", author = "A. Billionnet and S. Elloumi", journal = "Mathematical Programming", year = 2007, volume = 109, number = 1, pages = "55-68", note = "{note}", doi = "10.1007/s10107-005-0637-9", }