Invariant Blocks Under Coprime Actions

If a finite group $A$ acts coprimely as automorphisms on a finite group $G$, then the $A$-invariant Brauer $p$-blocks of $G$ are exactly those that contain $A$-invariant irreducible characters.

2010 Mathematics Subject Classification: 20C15, 20C20, 20C33

Keywords and Phrases: Coprime action, blocks, characters

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