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

Let UU be a smooth quasi-projective variety, and let ZUZ\subsetneq U be a proper closed subset such that every non-constant holomorphic map CUan\mathbb{C}\to U^{\operatorname{an}} factors over ZanZ^{\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 Homnc(C,U)\operatorname{Hom}^{nc}(C,U) denote its non-constant locus, and similarly for ΔU\Delta\subset U.

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

  1. UU is bounded modulo Δ\Delta.
  2. Every non-constant holomorphic map CHom(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,
dimHomnc(C,U)Hom(C,Δ)dimX1.\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 uUΔu\in U\setminus\Delta, the set of morphisms f:YUf: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.

Sources & referencesView supporting material

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).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.