The character conjecture for distinguishing dual fullerene graphs

For a feasible nn, let TnT_n be a dual fullerene graph, with adjacency matrix AA and degree matrix DD. For lpha,β\rtf]in(0,1)lpha,\beta\rtf]in (0,1), define its (lpha,β\rtf])(lpha,\beta\rtf])-character by

chlpha,β\rtf](Tn)=tr(exp(lphaA+βD\rtf])).ch_{lpha,\beta\rtf]}(T_n)=\operatorname{tr}\left(\exp\left(lpha A+\beta D\rtf]\right)\right).

Character conjecture. For lpha,β\rtf](0,1)lpha,\beta\rtf]\in(0,1) and feasible n1,n2n_1,n_2, if Tn1T_{n_1} and Tn2T_{n_2} are dual fullerenes, then

Tn1Tn2chlpha,β\rtf](Tn1)=chlpha,β\rtf](Tn2).T_{n_1}\simeq T_{n_2}\Longleftrightarrow ch_{lpha,\beta\rtf]}(T_{n_1})=ch_{lpha,\beta\rtf]}(T_{n_2}).

The claim asserts that one character value distinguishes dual fullerene graphs up to isomorphism for every parameter pair in the stated range. It is supported by numerical experiments in the source, which states no proof or counterexample.

Sources & referencesView supporting material

Primary source

Artur Bille, Victor Buchstaber and Evgeny Spodarev, “Some open mathematical problems on fullerenes”, arXiv:2410.19322 (2024).

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