Some Fundamental Properties of Successive Convex Relaxation Methods on   LCP and Related Problems
  General Successive Convex Relaxation Methods (SRCMs) can be used to compute the convex hull of any compact set, in an Euclidean space, described by a system of quadratic inequalities and a compact convex set which is not very complicated. Linear Complementarity Problems (LCPs) make an interesting and rich class of structured nonconvex optimization problems. In this paper, we study a few of the specialized lift-and-project methods and some of the possible ways of applying the general SCRMs to LCPs and related problems. 
Levent Tuncel, Masakazu Kojima (Tokyo Institute of Technology)