The combined Galois-automorphism Alperin weight conjecture for finite categories

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Let pp be a prime, let kk be an algebraic closure of Fp\mathbb{F}_p, let Γ=Gal(k/Fp)\Gamma={\rm Gal}(k/\mathbb{F}_p), and let C\mathcal{C} be a finite category. If C\mathcal{C} is a finite EI-category, let bb be a central idempotent of kCk\mathcal{C}; otherwise let b=1b=1. Let OC\mathcal{O}_{\mathcal{C}} be the pp-orbit category, let S(kCb)\mathcal{S}(k\mathcal{C}b) be the set of isomorphism classes of simple modules, and let W(kOC,b)\mathcal{W}(k\mathcal{O}_{\mathcal{C}},b) be the set of bb-weights. Write (Γ×Aut⁡(C))b(\Gamma\times\operatorname{Aut}(\mathcal{C}))_b for the stabiliser of bb. Combined Galois-automorphism conjecture. Let C\mathcal{C} be a finite category (respectively, EI-category) and let bb be the unit element (respectively, a central idempotent) of kCk\mathcal{C}. Then there exists a bijection

S(kCb)→W(kOC,b)\mathcal{S}(k\mathcal{C}b)\to\mathcal{W}(k\mathcal{O}_{\mathcal{C}},b)

commuting with the action of (Γ×Aut⁡(C))b(\Gamma\times\operatorname{Aut}(\mathcal{C}))_b, the stabiliser of bb in Γ×Aut⁡(C)\Gamma\times\operatorname{Aut}(\mathcal{C}). This combines the Galois and automorphism refinements and is presented as a stronger conjecture; no resolution is given in the supplied text.

References

Primary source

Xin Huang, “The Galois Alperin weight conjecture for finite category algebras”, arXiv:2604.06166 (2026).

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