Uniformisation of a once-punctured annulus
Complex Variables
2014-01-31 v1
Abstract
The universal cover or the covering group of a hyperbolic Riemann surface is important but hard to express explicitly. It can be, however, detected by the uniformisation and a suitable description of . Beardon proposed five different ways to describe twice-punctured disks using fundamental domain, hyperbolic length, collar and extremal length in 2012. We parameterize a once-punctured annulus in terms of five parameter pairs and give explicit formulas about the hyperbolic structure and the complex structure of . Several degenerating cases are also treated.
Cite
@article{arxiv.1401.7786,
title = {Uniformisation of a once-punctured annulus},
author = {Tanran Zhang},
journal= {arXiv preprint arXiv:1401.7786},
year = {2014}
}