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arxiv: 0910.4758 · v1 · submitted 2009-10-25 · 🧮 math.RT · math.GR

On the restriction of cross characteristic representations of ²F₄(q) to proper subgroups

classification 🧮 math.RT math.GR
keywords characteristicproperrepresentationrestrictionsubgroupabsolutelycrossdetermine
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We prove that the restriction of any nontrivial representation of the Ree groups $^2F_{4}(q), q=2^{2n+1}\geq8$ in odd characteristic to any proper subgroup is reducible. We also determine all triples $(K, V, H)$ such that $K \in \{^2F_4(2), ^2F_4(2)'\}$, $H$ is a proper subgroup of $K$, and $V$ is a representation of $K$ in odd characteristic restricting absolutely irreducibly to $H$.

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