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math.CO2013
Tutte polynomials and a stronger version of the Akiyama-Harary problem
Jernej Azarija
Can a non self-complementary graph have the same chromatic polynomial as its complement? The answer to this question of Akiyama and Harrary is positive and was given by J. Xu and Z…
math.CO2013
A short note on a short remark of Graham and Lovász
Jernej Azarija
Let D be the distance matrix of a connected graph G and let nn(G), np(G) be the number of strictly negative and positive eigenvalues of D respectively. It was remarked in [1] that…