Sachiko Hyugaji

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A novel pair of isospectral nonahedral graphs with eight vertices were found, which not only have the same characteristic polynomial, PG(x), but also have the same distance polynomial, SG(X), and the same polygonal cf3 = 6,f4 = 3) and vertex degree (u3 = 4, u4 = 2,v5 = 2) distributions, contrary to the observation that almost all the reported pairs of(More)
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