The reduced p-section subnormalizer conjecture

Let GG be a finite group, let pp be a prime, let PSylp(G)P\in\operatorname{Syl}_p(G), and let xPx\in P. Let Rp(x)R_p(x) be a set of representatives for the conjugacy classes in the reduced pp-section of xx. The reduced pp-section subnormalizer conjecture. There exists a bijection

f:IrrRp(x)(G)IrrRp(x)(SubG(x))f:\operatorname{Irr}^{R_p(x)}(G)\longrightarrow \operatorname{Irr}^{R_p(x)}(\operatorname{Sub}_G(x))

such that it preserves pp-parts of degrees, vanishing on every element of Rp(x)R_p(x), fields of character values there, and the subsets of characters nonzero at each gRp(x)g\in R_p(x). This strengthens the subnormalizer conjecture by controlling a whole reduced pp-section; it is open in general.

Sources & referencesView supporting material

Primary source

Alexander Moretó, “Alperin's Main Problem of Block Theory”, arXiv:2605.11988 (2026).

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