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|Paper IPM / M / 16521||
Let G be a finite group, Irr(G) the set of all irreducible complex characters of G and x in Irr(G). Let also
cod(x) = - G : kerx - =x(1) and cod(G) = cod(x) - x ∈ Irr(G). In this note, we show that the simple group
PSL(2; q), for a prime power q > 3, is uniquely determined by the set of its codegree.
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