The tropical F-polynomial identity for nondegenerate quivers with potential

Let δ\delta and ϵˇ\check{\epsilon} be weights for a quiver with potential, and write fˇδ\check{f}_{\delta} and fϵˇf_{\check{\epsilon}} for the dual and ordinary tropical FF-polynomials associated with general representations of weights δ\delta and ϵˇ\check{\epsilon}, respectively. Let hom(δ,ϵˇ)\hom(\delta,\check{\epsilon}) denote the relevant homomorphism invariant. Tropical F-polynomial conjecture. For a nondegenerate quiver with potential, and any δ\delta and ϵˇ\check{\epsilon}, one has

fˇδ(ϵˇ)=hom(δ,ϵˇ)=fϵˇ(δ).\check{f}_{\delta}(\check{\epsilon})=\hom(\delta,\check{\epsilon})=f_{\check{\epsilon}}(\delta).

The identity would relate the dual and ordinary tropical FF-polynomials through the homomorphism invariant; the source gives no resolution.

Sources & referencesView supporting material

Primary source

Jiarui Fei, “Crystal Structure of Upper Cluster Algebras”, arXiv:2309.08326 (2026).

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