We determine the values of s and t for which there is a coloring of the edges of the complete bipartite graph K-s,K-t which admits only the identity automorphism. In particular, this allows us to determine the distinguishing number of the Cartesian product of complete graphs. (C) 2007 Elsevier B.V. All rights reserved.
机构:
Ecole Polytech Fed Lausanne, Fac Sci Base, Inst Math IMA RO SE, CH-1015 Lausanne, SwitzerlandEcole Polytech Fed Lausanne, Fac Sci Base, Inst Math IMA RO SE, CH-1015 Lausanne, Switzerland