The Weak Specialness Conjecture for entire curves and function fields

Let XX be a projective variety defined over C{\mathbb C}. An entire curve on XX is a holomorphic map from C{\mathbb C} to XX. Let YexcY_{\mathrm{exc}} be a proper closed subset, let π:XY\pi:X\to Y be a dominant map, let L\mathcal L be an ample line bundle on YY, and let α\alpha be a positive constant. Weak Specialness Conjecture. The variety XX is weakly special if and only if both of the following conditions hold: there exists an entire curve CX{\mathbb C}\to X with Zariski-dense image; and there are no dominant map π:XY\pi:X\to Y, ample line bundle L\mathcal L, positive constant α\alpha, and proper closed subset YexcY_{\mathrm{exc}} such that, for every smooth integral curve C{\mathcal C} and morphism s:CXs:{\mathcal C}\to X with s(C)s({\mathcal C}) not contained in YexcY_{\mathrm{exc}},

deg(πs)Lα(2g(C)2).\deg (\pi\circ s)^*\mathcal L\leq\alpha\left(2g({\mathcal C})-2\right).

This is presented as the analogue of the rational-point conjecture for entire curves and function fields. The supplied text does not state whether it is open or resolved.

Sources & referencesView supporting material

Primary source

Erwan Rousseau, Amos Turchet and Julie Tzu-Yueh Wang, “Nonspecial varieties and Generalized Lang-Vojta conjectures”, arXiv:2001.10229 (2021).

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