LAURENCE A. WOLSEY is Professor of Applied Mathematics at the Center for Operations Research and Econometrics at l'Universite Catholique de Louvain at Louvain-la-Neuve, Belgium. He is the author, with George Nemhauser, of Integer and Combinatorial Optimization.
GEORGE NEMHAUSER is an A. Russell Chandler III Chair and Institute Professor in the H. Milton Stewart School of Industrial and Systems Engineering at Georgia Tech.