The Galois Alperin weight conjecture for finite category algebras

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 with pp-orbit category OC\mathcal{O}_{\mathcal{C}}. Let S(kC)\mathcal{S}(k\mathcal{C}) be the set of isomorphism classes of simple kCk\mathcal{C}-modules and let W(kOC)\mathcal{W}(k\mathcal{O}_{\mathcal{C}}) be the set of isomorphism classes of weights. The Galois Alperin weight conjecture. For any finite category C\mathcal{C}, there exists a bijection

S(kC)→W(kOC)\mathcal{S}(k\mathcal{C})\to\mathcal{W}(k\mathcal{O}_{\mathcal{C}})

commuting with the action of Γ\Gamma. This is the main Galois refinement proposed for finite category algebras; the abstract further states that it is reduced to the corresponding conjecture for finite groups.

References

Primary source

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

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