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A Family of Counter Examples to an Approach to Graph Isomorphism (0801.1766v2)
Published 11 Jan 2008 in cs.CC and cs.DM
Abstract: We give a family of counter examples showing that the two sequences of polytopes $\Phi_{n,n}$ and $\Psi_{n,n}$ are different. These polytopes were defined recently by S. Friedland in an attempt at a polynomial time algorithm for graph isomorphism.