2 papers
math.CV2023
Movement of branch points in Ahlfors' theory of covering surfaces
Yun-Ling Chen, Tian-Run Lin, Guang-Yuan Zhang
In this paper, we will prove a result which is used by Guang-Yuan Zhang in another paper in which the existence of extremal surfaces for covering surfaces is proved and the sharp f…
math.CV2023
A finite theorem for Ahlfors' covering surface theory
Tian-Run Li, Yun-Ling Chen, Guang-Yuan Zhang
Ahlfors' theory of covering surfaces is one of the major mathematical achievement of last century. The most important part of his theory is the Second Fundamental Theorem (SFT). We…