English

Quasiconformal extension of meromorphic functions with nonzero pole

Complex Variables 2015-02-19 v1

Abstract

In this note, we consider meromorphic univalent functions f(z)f(z) in the unit disc with a simple pole at z=p(0,1)z=p\in(0,1) which have a kk-quasiconformal extension to the extended complex plane C^,\hat{\mathbb C}, where 0k<10\leq k < 1. We denote the class of such functions by Σk(p)\Sigma_k(p). We first prove an area theorem for functions in this class. Next, we derive a sufficient condition for meromorphic functions in the unit disc with a simple pole at z=p(0,1)z=p\in(0,1) to belong to the class Σk(p)\Sigma_k(p). Finally, we give a convolution property for functions in the class Σk(p)\Sigma_k(p).

Keywords

Cite

@article{arxiv.1502.05125,
  title  = {Quasiconformal extension of meromorphic functions with nonzero pole},
  author = {Bappaditya Bhowmik and Goutam Satpati and Toshiyuki Sugawa},
  journal= {arXiv preprint arXiv:1502.05125},
  year   = {2015}
}

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8 pages