Moretó's picky conjecture for finite groups

From papers

Let GG be a finite group, let pp be a prime, and let xGx\in G be a picky pp-element, meaning that xx lies in a unique Sylow pp-subgroup. Let PSylp(G)P\in\operatorname{Syl}_p(G) contain xx. Write Irrx(G)\operatorname{Irr}^x(G) for the irreducible complex characters of GG that are nonzero at xx. Picky conjecture. There exists a bijection

f:Irrx(G)Irrx(NG(P))f:\operatorname{Irr}^x(G)\to\operatorname{Irr}^x(\operatorname{N}_G(P))

such that, for every χIrrx(G)\chi\in\operatorname{Irr}^x(G), χ(1)p=f(χ)(1)p\chi(1)_p=f(\chi)(1)_p and Q(f(χ)(x))=Q(χ(x))\mathbb{Q}(f(\chi)(x))=\mathbb{Q}(\chi(x)). The conjecture proposes a local-global character correspondence; the source notes that it has been proved in several important classes, including quasisimple groups of Lie type in non-defining characteristic, symmetric groups, and pp-solvable groups with p2p\neq2.

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Sources & referencesView supporting material

Primary source

Gabriel A. L. Souza, “Subnormalizers and character correspondences in p-solvable groups”, arXiv:2605.22669 (2026).

Additional references

3 papers in this index state this conjecture (2026). The statement above is taken from the most recent of them; the others are arXiv:2605.11988, arXiv:2604.24565.

Solutions 0

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