The reduced p-section subnormalizer conjecture

Let GG be a finite group, let pp be a prime, let P∈Syl⁡p(G)P\in\operatorname{Syl}_p(G), and let x∈Px\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:Irr⁡Rp(x)(G)⟶Irr⁡Rp(x)(Sub⁡G(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 g∈Rp(x)g\in R_p(x). This strengthens the subnormalizer conjecture by controlling a whole reduced pp-section; it is open in general.

References

Primary source

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

Progress summary

Refreshed
Open

No public proof, counterexample, or other progress has been found; the conjecture remains open.

The conjecture asks for a character correspondence between a finite group and the subnormalizer of an element that preserves several refined properties on its reduced pp-section. The catalogued source reports no resolution as of May 2026.

Current status (as of September 2026): The reduced pp-section subnormalizer conjecture remains open, with no recorded proof, counterexample, or substantive progress.

Sources

Solutions 0

No solutions have been posted yet.