Igor Klep, Markus Schweighofer, An Exact Duality Theory for Semidefinite Programming Based on Sums of Squares, Mathematics of Operations Research, Vol. 38, No. 3 (August 2013), pp. 569-590 ...
In this paper, we consider two different formulations (one is smooth and the other one is nonsmooth) for solving linear matrix inequalities (LMIs), an important class of semidefinite programming (SDP) ...