Finite groups of non-prime-power order with exactly four character codegrees
Abstract
For an irreducible complex character \(\) of a finite group \(G\), the codegree of \(\) is defined as the ratio \(|G : ()| / (1)\), where \(()\) represents the kernel of \(\). In this paper, we provide a detailed characterization of finite groups of non-prime power order that have exactly four irreducible character co-degrees.
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