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On analytic functions related to Booth-lemniscate

Complex Variables 2025-09-22 v1

Abstract

For 0α10\le \alpha\le 1 , let BS(α)\mathcal{BS}(\alpha) be the class of all analytic functions in the unit disk D:={ zC:z<1}\mathbb{D}:=\{~z\in\mathbb{C}:|z|<1\} with normalization f(0)=0f(0)=0 and f(0)=1f'(0)=1 that satisfy the subordinate relation zf(z)/f(z)1z/(1αz2)zf'(z)/f(z)-1\prec z/(1-\alpha z^2) and BK(α)\mathcal{BK}(\alpha) be the class of all functions ff for which zfBS(α)zf' \in \mathcal{BS}(\alpha). In this article, we obtain a sharp estimate of the initial Taylor coefficients and logarithmic coefficients for functions in the classes BS(α)\mathcal{BS}(\alpha) and BK(α)\mathcal{BK}(\alpha). Further, we obtain the radius of convexity and study the pre-Schwarzian norm for the classes BS(α)\mathcal{BS}(\alpha) and BK(α)\mathcal{BK}(\alpha).

Keywords

Cite

@article{arxiv.2509.15534,
  title  = {On analytic functions related to Booth-lemniscate},
  author = {Md Firoz Ali and Md Nurezzaman and Lokenath Thakur},
  journal= {arXiv preprint arXiv:2509.15534},
  year   = {2025}
}
R2 v1 2026-07-01T05:45:00.940Z