科研之友
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摘要
Let G be a finite group. A vanishing element of G is an element g is an element of G such that chi(g) = 0 for some irreducible complex character chi of G. Denote by Vo(G) the set of the orders of vanishing elements of G. In this paper, we prove that if G is a finite group such that Vo(G) = Vo(Sz(2(2m+1))), m >= 1, then G congruent to Sz(2(2m+1)).
