English

Geometric properties of the shifted hypergeometric functions

Complex Variables 2017-04-27 v1

Abstract

We will provide sufficient conditions for the shifted hypergeometric function z2F1(a,b;c;z)z_2F_1(a,b;c;z) to be a member of a specific subclass of starlike functions in terms of the complex parameters a,ba,b and c.c. For example, we study starlikeness of order α,\alpha, λ\lambda-spirallikeness of order α\alpha and strong starlikeness of order α.\alpha. In particular, those properties lead to univalence of the shifted hypergeometric functions on the unit disk.

Keywords

Cite

@article{arxiv.1704.07948,
  title  = {Geometric properties of the shifted hypergeometric functions},
  author = {Toshiyuki Sugawa and Li-Mei Wang},
  journal= {arXiv preprint arXiv:1704.07948},
  year   = {2017}
}

Comments

13 pages, 1 table