Uniform rationality conjecture for totally negative quiver jet-counts

From papers

Let QQ be a quiver and let dZ0Q0{0}\mathbf{d}\in\mathbb{Z}_{\geq0}^{Q_{0}}\setminus\{0\} such that (Q,d)(Q,\mathbf{d}) has property (P). Let μQ,d\mu_{Q,\mathbf{d}} be the corresponding moment map. Uniform rationality conjecture. There exists a rational fraction WQ(T)W\in\mathbb{Q}(T) such that, for almost all primes pp and every finite field Fq\mathbb{F}_{q} of characteristic pp,

W(q)=limn+qndimμQ,d1(0)#μQ,d1(0)(Fq[t]/(tn)).W(q)=\lim_{n\to+\infty}q^{-n\dim\mu_{Q,\mathbf{d}}^{-1}(0)}\#\mu_{Q,\mathbf{d}}^{-1}(0)(\mathbb{F}_{q}[t]/(t^{n})).

The preceding result establishes convergence for totally negative quivers, while the conjecture asks for a single rational function governing the limit uniformly over finite fields; the source notes that this is known when d=1\mathbf{d}=\underline{1}.

Progress summary

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Sources & referencesView supporting material

Primary source

Tanguy Vernet, “Counting representations of quivers with multiplicities”, arXiv:2405.14914 (2024).

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