Nevanlinna Theory on Berkovich Curves

Source abstract

We develop a value distribution theory for finite analytic morphisms between proper connected quasi-smooth Berkovich curves over a complete algebraically closed non-Archimedean field. The central tool is a multi-tail Dirichlet Green function on finite truncations of a generalized skeleton, which makes non-Archimedean potential theory on skeleta compatible with global Nevanlinna asymptotics. Using it, we prove the first main theorem as an exact identity relating the characteristic, counting, and proximity functions. For logarithmic targets we establish a second main theorem in both ramified and level-one truncated forms. The defect relation is also given. The theory provides a Berkovich-analytic framework for non-Archimedean value distribution, bridging classical Nevanlinna theory and its $p$-adic counterpart.