English

Logarithmic coefficients for certain subclasses of close-to-convex functions

Complex Variables 2016-07-26 v2

Abstract

Let S\mathcal{S} denote the class of functions analytic and univalent (i.e. one-to-one) in the unit disk D={zC:z<1}\mathbb{D}=\{z\in\mathbb{C}:\, |z|<1\} normalized by f(0)=0=f(0)1f(0)=0=f'(0)-1. The logarithmic coefficients γn\gamma_n of fSf\in\mathcal{S} are defined by logf(z)z=2n=1γnzn.\log \frac{f(z)}{z}= 2\sum_{n=1}^{\infty} \gamma_n z^n. In the present paper, we determine the sharp upper bounds for γ1|\gamma_1|, γ2|\gamma_2| and γ3|\gamma_3| when ff belongs to some familiar subclasses of close-to-convex functions.

Keywords

Cite

@article{arxiv.1607.01843,
  title  = {Logarithmic coefficients for certain subclasses of close-to-convex functions},
  author = {U. Pranav Kumar and A. Vasudevarao},
  journal= {arXiv preprint arXiv:1607.01843},
  year   = {2016}
}

Comments

17 pages

R2 v1 2026-06-22T14:47:44.056Z