Minimal-Energy Clusters of Hard Spheres.
Minimization of a convex quadratic function subject to separable conical constraints in granular dynamics
The numerical solution of granular dynamics problems with Coulomb friction leads to the problem of minimizing a convex quadratic function with semidefinite Hessian subject to a separable conical constraints. In this paper, we are interested in the numerical solution of this problem. We suggest a modification of an active-set optimal quadratic programming algorithm. The number of projection steps is decreased by using a projected Barzilai-Borwein method. In the numerical experiment, we compare our...
Minimization of Extended Quadratic Functions.