On the Behavior of the Homogeneous Self-Dual Model for Conic Convex Optimization
Author(s)Freund, Robert M.
There is a natural norm associated with a starting point of the homogeneous self-dual (HSD) embedding model for conic convex optimization. In this norm two measures of the HSD model’s behavior are precisely controlled independent of the problem instance: (i) the sizes of Îµ-optimal solutions, and (ii) the maximum distance of Îµ-optimal solutions to the boundary of the cone of the HSD variables. This norm is also useful in developing a stopping-rule theory for HSD-based interior-point methods such as SeDuMi. Under mild assumptions, we show that a standard stopping rule implicitly involves the sum of the sizes of the Îµ-optimal primal and dual solutions, as well as the size of the initial primal and dual infeasibility residuals. This theory suggests possible criteria for developing starting points for the homogeneous self-dual model that might improve the resulting solution time in practice
Massachusetts Institute of Technology, Operations Research Center
Operations Research Center Working Paper Series;OR 372-04