Initial Estimates of Seven Coefficients for a Subclass of Bi-Starlike Functions

Janani T., Yalçın S. N.

UKRAINIAN MATHEMATICAL JOURNAL, vol.73, no.11, pp.1825-1834, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 73 Issue: 11
  • Publication Date: 2022
  • Doi Number: 10.1007/s11253-022-02032-2
  • Journal Name: UKRAINIAN MATHEMATICAL JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, MathSciNet, zbMATH
  • Page Numbers: pp.1825-1834
  • Bursa Uludag University Affiliated: Yes

Abstract

We study a subclass of bi-starlike functions and obtain, for the first time, the initial seven Taylor- Maclaurin coefficient estimates |a(2)|, |a(3)|, . . . , |a(7)| for functions from a subclass of the function class sigma. Some new or known consequences of the accumulated results are also pointed out.