Limit-height conjecture for translated complete intersections in toric varieties

Let K\mathbb{K} be a number field with set of places M\mathfrak{M}, let T\mathbb{T} be a split algebraic torus over K\mathbb{K} of dimension nn with character lattice MM, and let knk\leq n. Let f=(f1,,fk)\bm{f}=(f_1,\ldots,f_k) be a family of nonzero Laurent polynomials in K[M]\mathbb{K}[M]. Let XX be a complete toric variety with torus T\mathbb{T}, equipped with semipositive toric metrized divisors D0,,Dnk\overline{D}_0,\ldots,\overline{D}_{n-k}. For a family of points t=(t1,,tk)\bm{t}=(t_1,\ldots,t_k), write tf=(t1f1,,tkfk)\bm{t}^*\bm{f}=(t_1^*f_1,\ldots,t_k^*f_k) and let ZT(tf)Z_{\mathbb{T}}(\bm{t}^*\bm{f}) denote the cycle obtained by properly intersecting the corresponding twisted divisors on TK\mathbb{T}_{\overline{\mathbb{K}}}. Limit-height conjecture. For each sequence (ω)(\bm{\omega}_\ell)_\ell of torsion points in T(K)k\mathbb{T}(\overline{\mathbb{K}})^k whose projection to (Tk/T)(K)(\mathbb{T}^k/\mathbb{T})(\overline{\mathbb{K}}) via the diagonal action is strict, one has

limhD0,,Dnk(ZT(ωf))=vMnvMIM(ϑD0,v,,ϑDnk,v,ρf1,v,,ρfk,v).\lim_{\ell\to\infty}\operatorname{h}_{\overline{D}_0,\ldots,\overline{D}_{n-k}}(Z_{\mathbb{T}}(\bm{\omega}_\ell^*\bm{f})) =\sum_{v\in\mathfrak{M}}n_v\operatorname{MI}_M(\vartheta_{\overline{D}_0,v},\ldots,\vartheta_{\overline{D}_{n-k},v},\rho_{f_1,v}^{\vee},\ldots,\rho_{f_k,v}^{\vee}).

Here nvn_v is the weight of vv, ϑDi,v\vartheta_{\overline{D}_i,v} is the vv-adic roof function of Di\overline{D}_i, and ρfj,v\rho_{f_j,v}^{\vee} is the Legendre-Fenchel dual of the vv-adic Ronkin function of fjf_j. This conjectural formula would express the limiting height of translated higher-codimensional complete-intersection cycles using only toric metrized-divisor data and the arithmetic Ronkin data of the defining Laurent polynomials; it strengthens earlier guesses of Gualdi and Sombra and remains unresolved here.

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Primary source

Roberto Gualdi and Martín Sombra, “Heights of complete intersections in toric varieties”, arXiv:2412.16308 (2026).

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