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Let V be a faithful G-module for a finite group G and let p be a prime dividing |G|. An orbit vG for the action of G on V is p-regular if |vG|p=|G:CG(v)|p=|G|p. Zhang asks the following question in Zhang (1993) [8]. Assume that a finite solvable group G acts faithfully and irreducibly on a vector space V over a finite field F. If G has a p-regular orbit for every prime p dividing |G|, is it true that...
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