# Meromorphic Functions over Non-Archimedean Fields

• Pei-Chu Hu
• Chung-Chun Yang
Book

Part of the Mathematics and Its Applications book series (MAIA, volume 522)

1. Front Matter
Pages i-viii
2. Pei-Chu Hu, Chung-Chun Yang
Pages 1-31
3. Pei-Chu Hu, Chung-Chun Yang
Pages 33-75
4. Pei-Chu Hu, Chung-Chun Yang
Pages 77-113
5. Pei-Chu Hu, Chung-Chun Yang
Pages 115-138
6. Pei-Chu Hu, Chung-Chun Yang
Pages 139-175
7. Pei-Chu Hu, Chung-Chun Yang
Pages 177-223
8. Pei-Chu Hu, Chung-Chun Yang
Pages 225-241
9. Back Matter
Pages 243-295

### Introduction

Nevanlinna theory (or value distribution theory) in complex analysis is so beautiful that one would naturally be interested in determining how such a theory would look in the non­ Archimedean analysis and Diophantine approximations. There are two "main theorems" and defect relations that occupy a central place in N evanlinna theory. They generate a lot of applications in studying uniqueness of meromorphic functions, global solutions of differential equations, dynamics, and so on. In this book, we will introduce non-Archimedean analogues of Nevanlinna theory and its applications. In value distribution theory, the main problem is that given a holomorphic curve f : C -+ M into a projective variety M of dimension n and a family 01 of hypersurfaces on M, under a proper condition of non-degeneracy on f, find the defect relation. If 01 n is a family of hyperplanes on M = r in general position and if the smallest dimension of linear subspaces containing the image f(C) is k, Cartan conjectured that the bound of defect relation is 2n - k + 1. Generally, if 01 is a family of admissible or normal crossings hypersurfaces, there are respectively Shiffman's conjecture and Griffiths-Lang's conjecture. Here we list the process of this problem: A. Complex analysis: (i) Constant targets: R. Nevanlinna[98] for n = k = 1; H. Cartan [20] for n = k > 1; E. I. Nochka [99], [100],[101] for n > k ~ 1; Shiffman's conjecture partially solved by Hu-Yang [71J; Griffiths-Lang's conjecture (open).

### Keywords

Meromorphic function Nevanlinna theory differential equation distribution iteration

#### Authors and affiliations

• Pei-Chu Hu
• 1
• Chung-Chun Yang
• 2
1. 1.Shandong UniversityShandongP.R. China
2. 2.University of Science and TechnologyClearwater Bay, Hong KongChina

### Bibliographic information

• DOI https://doi.org/10.1007/978-94-015-9415-8