The consequence of the extended Lang–Vojta conjecture for pointed maps

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Let UU be a smooth quasi-projective variety, and let Z⊊UZ\subsetneq U be a proper closed subset such that every non-constant holomorphic map C→Uan⁡\mathbb{C}\to U^{\operatorname{an}} factors over Zan⁡Z^{\operatorname{an}}. For a variety CC, let Hom⁡(C,U)\operatorname{Hom}(C,U) denote the moduli space of morphisms from CC to UU, let Hom⁡nc(C,U)\operatorname{Hom}^{nc}(C,U) denote its non-constant locus, and similarly for Δ⊂U\Delta\subset U.

Consequence of the extended Lang–Vojta conjecture. There is a proper closed subset Δ⊊U\Delta\subsetneq U such that:

  1. UU is bounded modulo Δ\Delta.
  2. Every non-constant holomorphic map C→Hom⁡(C,U)an⁡\mathbb{C}\to\operatorname{Hom}(C,U)^{\operatorname{an}} factors over Hom⁡(C,Δ)an⁡\operatorname{Hom}(C,\Delta)^{\operatorname{an}}.
  3. For every smooth quasi-projective curve CC,
dim⁡Hom⁡nc(C,U)∖Hom⁡(C,Δ)≤dim⁡X−1.\dim\operatorname{Hom}^{nc}(C,U)\setminus\operatorname{Hom}(C,\Delta)\leq\dim X-1.
  1. For every variety YY, every point yy of YY, and every u∈U∖Δu\in U\setminus\Delta, the set of morphisms f:Y→Uf:Y\to U satisfying f(y)=uf(y)=u is finite.

The source states that this conjecture follows from the extended Lang–Vojta conjecture. It packages boundedness, hyperbolicity inheritance, a dimension bound for non-constant maps, and finiteness of pointed maps, but no resolution is supplied.

References

Primary source

Ariyan Javanpeykar, Steven Lu, Ruiran Sun and Kang Zuo, “Finiteness of pointed maps to moduli spaces of polarized varieties”, arXiv:2310.06784 (2025).

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