Inductive Galois Alperin weight conjecture

Fix a prime pp, a sufficiently large pp-modular system (K,O,F)(\mathcal{K},\mathcal{O},F) with finite residue field, and a finite abelian group HAut(K)\mathcal{H}\leq \operatorname{Aut}(\mathcal{K}) preserving O\mathcal{O} and surjecting onto Aut(F)\operatorname{Aut}(F). Let GAG\unlhd A be finite groups, let IBr(G)\operatorname{IBr}(G) be the irreducible Brauer characters of GG, and let W(G)/G\mathcal{W}(G)/G be the set of GG-conjugacy classes of pp-weights. For a character or weight, use the stabilizer notation appearing in the source, and let c\geqslant_c denote the central-isomorphism relation on H\mathcal{H}-triples. Inductive Galois Alperin weight conjecture. There exists an H×A\mathcal{H}\times A-equivariant bijection Ω:IBr(G)W(G)/G\Omega:\operatorname{IBr}(G)\rightarrow\mathcal{W}(G)/G such that

(AθH,G,θ)Hc(NA(Q)φH,NG(Q),φ)H(A_{\theta^{\mathcal{H}}},G,\theta)_{\mathcal{H}}\geqslant_c(\operatorname{N}_A(Q)_{\varphi^{\mathcal{H}}},\operatorname{N}_G(Q),\varphi)_{\mathcal{H}}

for any θIBr(G)\theta\in\operatorname{IBr}(G) and (Q,φ)Ω(θ)(Q,\varphi)\in\Omega(\theta). This is the strengthened inductive form of the Galois Alperin weight conjecture; the source states that the inductive condition is intended to reduce to quasi-simple groups, but gives no resolution status.

Sources & referencesView supporting material

Primary source

Zhicheng Feng, Qulei Fu and Yuanyang Zhou, “A reduction theorem for the blockwise Navarro Alperin weight conjecture via H-triples”, arXiv:2512.15243 (2026).

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