T Fujie   A Tamura   
JOURNAL OF THE OPERATIONS RESEARCH SOCIETY OF JAPAN 45(3) 285-292 2002年9月
Grotschel, Lovasz and Schrijver introduced a convex set containing the stable set polytope of a graph. They proved that the set is a polytope if and only if the corresponding graph is perfect. In this paper, we give an alternative proof of the fac...