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Finite groups with a small proportion of vanishing elements

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arxiv 2303.16391 v2 pith:LE4PDOAU submitted 2023-03-29 math.GR

classification math.GR
keywords finitemathbfmathrmelementsfracgroupsproportioncdots
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abstract

The function $\mathrm{P}_{\mathbf{v}}(G)$, measuring the proportion of the elements of a finite group $G$ that are zeros of irreducible characters of $G$, takes (as proved in [12]) only values $\frac{m-1}{m}$, for $1 \leq m \leq 6$, in the interval $[0, \mathrm{P}_{\mathbf{v}}(A_7))$.In this paper, we give a complete classification of the finite groups $G$ such that $\mathrm{P}_{\mathbf{v}}(G)=\frac{m-1}{m}$ for $m=1,2,\cdots ,6$.

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