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The chromatic polynomials of signed Petersen graphs
2015
Involve. A Journal of Mathematics
Zaslavsky proved in 2012 that, up to switching isomorphism, there are six different signed Petersen graphs and that they could be told apart by their chromatic polynomials, by showing that the latter give distinct results when evaluated at 3. He conjectured that the six different signed Petersen graphs also have distinct zero-free chromatic polynomials, and that both types of chromatic polynomials have distinct evaluations at any positive integer. We developed and executed a computer program
doi:10.2140/involve.2015.8.825
fatcat:rojesxuphzeiznsmj6ztwi27xy