Papers › Local Convergence of Proximal Splitting Methods for Rank Constrained Problems
Local Convergence of Proximal Splitting Methods for Rank Constrained Problems
Christian Grussler, Pontus Giselsson
We analyze the local convergence of proximal splitting algorithms to solve optimization problems that are convex besides a rank constraint. For this, we show conditions under which the proximal operator of a function involving the rank constraint is locally identical to the proximal operator of its convex envelope, hence implying local convergence. The conditions imply that the non-convex algorithms locally converge to a solution whenever a convex relaxation involving the convex envelope can be expected to solve the non-convex problem.
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