Regular Functions on Formal-Analytic Arithmetic Surfaces

Samuel Goodman

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arXiv · 2512.07098

Regular Functions on Formal-Analytic Arithmetic Surfaces

Samuel Goodman

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Abstract

In this paper, we show that for a broad class of pseudoconvex formal-analytic arithmetic surfaces over $\text{Spec}(\mathbb{Z})$, those which admit a nonconstant monic such regular function, that a conjecture of Bost-Charles that the ring of regular functions has continuum cardinality is implied by a purely complex-analytic conjecture. Under the conjecture, a Fekete-Szego-type approximation argument produces a polynomial "large" relative to the regular function, which in turn yields continuum many distinct regular functions. We also introduce a formula for the pushforward by a holomorphic function of the equilibrium Green's functions for our bordered Riemann surface with boundary, a formula which has constant term related to Arakelov degree.

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Samuel Goodman. 2025-12-11. Regular Functions on Formal-Analytic Arithmetic Surfaces. https://arxiv.org/abs/2512.07098

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