English

On Coefficient problems for \textbf{$S^*_{\rho}$}

Complex Variables 2024-12-24 v1

Abstract

Logarithmic and inverse logarithmic coefficients play a crucial role in the theory of univalent functions. In this study, we focus on the class of starlike functions Sρ\mathcal{S}^*_\rho, defined as Sρ={fA:zf(z)f(z)ρ(z),  zD}, \mathcal{S}^*_\rho = \left\{ f \in \mathcal{A} : \frac{z f'(z)}{f(z)} \prec \rho(z), \; z \in \mathbb{D} \right\}, where ρ(z):=1+sinh1(z)\rho(z) := 1 + \sinh^{-1}(z), which maps the unit disk D\mathbb{D} onto a petal-shaped domain. This investigation aims to establish bounds for the second Hankel and Toeplitz determinants, with their entries determined by the logarithmic coefficients of ff and its inverse f1f^{-1}, for functions fSρf \in \mathcal{S}^*_\rho.

Keywords

Cite

@article{arxiv.2412.17403,
  title  = {On Coefficient problems for \textbf{$S^*_{\rho}$}},
  author = {S. Sivaprasad Kumar and Arya Tripathi and Snehal Pannu},
  journal= {arXiv preprint arXiv:2412.17403},
  year   = {2024}
}
R2 v1 2026-06-28T20:46:16.371Z