English

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 XX is important but hard to express explicitly. It can be, however, detected by the uniformisation and a suitable description of XX. 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 AA in terms of five parameter pairs and give explicit formulas about the hyperbolic structure and the complex structure of AA. Several degenerating cases are also treated.

Keywords

Cite

@article{arxiv.1401.7786,
  title  = {Uniformisation of a once-punctured annulus},
  author = {Tanran Zhang},
  journal= {arXiv preprint arXiv:1401.7786},
  year   = {2014}
}
R2 v1 2026-06-22T02:57:40.811Z