Mittag-Leffler problems on Berkovich curves

TL;DR

This paper establishes criteria for extending local analytic functions and differential forms on Berkovich curves with finite triangulations, and revalidates the residue theorem in this non-Archimedean setting.

Contribution

It provides new criteria for solving Mittag-Leffler problems on Berkovich curves and offers a reproof of the residue theorem in this context.

Findings

Criteria for extending functions and differentials on Berkovich curves

Reproof of the residue theorem for smooth Berkovich curves

Application to non-Archimedean analytic geometry

Abstract

Given a quasi-smooth Berkovich curve $X$ admitting a finite triangulation, finitely many disjoint open annuli $A_1,\dots,A_n$ in $X$ that are not precompact, and for each $i=1,\dots, n$, an analytic function $f_i$ (resp. differential form $\sigma_i$) convergent on $A_i$, we provide a criterion for when there exists an analytic function $f$ (resp. a differential form $\sigma$) on $X$ inducing the functions $f_i$ (resp. differentials $\sigma_i$). Along the way we reprove residue theorem for differentials on smooth Berkovich curves that admit finite triangulations.