Paper Info
Title
Exact Algorithms For Semidefinite Programs With Degenerate Feasible Set
Abstract
Let A(0),..., A(n) be m x m symmetric matrices with entries in Q, and let A(x) be the linear pencil A(0) + x(1)A(1) + ... + x(n)A(n), where x = (x(1),..., x(n)) are unknowns. The linear matrix inequality (LMI) A(x) >= 0 defines the subset of R-n, called spectrahedron, containing all points x such that A(x) has non-negative eigenvalues. The minimization of linear functions over spectrahedra is called semidefinite programming (SDP). Such problems appear frequently in control theory and real algebra, especially in the context of nonnegativity certificates for multivariate polynomials based on sums of squares. Numerical software for solving SDP are mostly based on the interior point method, assuming some non-degeneracy properties such as the existence of interior points in the admissible set. In this paper, we design an exact algorithm based on symbolic homotopy for solving semidefinite programs without assumptions on the feasible set, and we analyze its complexity. Because of the exactness of the output, it cannot compete with numerical routines in practice but we prove that solving such problems can be done in polynomial time if either n orm is fixed.
Year
DOI
Venue
2018
10.1145/3208976.3209022
ISSAC'18: PROCEEDINGS OF THE 2018 ACM INTERNATIONAL SYMPOSIUM ON SYMBOLIC AND ALGEBRAIC COMPUTATION
Keywords
DocType
Volume
Semidefinite programming, Polynomial optimization, Exact computation, Homotopy
Conference
abs/1802.02834
Citations 
PageRank 
References 
0
0.34
21
Authors
3
Name
Order
Citations
PageRank
Daniel Henrion1637.51
Simone Naldi2203.09
Mohab Safey El Din345035.64