ESTIMATES ON INITIAL COEFFICIENT BOUNDS OF SUBCLASSES OF BI-UNIVALENT FUNCTIONS DEFINED BY GENERALIZED DIFFERENTIAL OPERATOR
Print ISSN: 0972-7752 | Online ISSN: 2582-0850 | Total Downloads : 65
DOI: https://doi.org/10.56827/SEAJMMS.2024.2001.5
Author :
Girish D. Shelake (Department of Mathematics, Willingdon College, Sangli - 416415, Maharashtra, INDIA)
Sarika K. Nilapgol (Department of Mathematics, Shivaji University, Kolhapur - 416004, Maharashtra, INDIA)
Santosh B. Joshi (Department of Mathematics, Walchand College of Engineering, Sangali - 416415, Maharashtra, INDIA)
Abstract
In this present paper, we introduce two new subclasses $\mathcal{H}^{k}_{\Sigma}(\alpha, \delta, \lambda,\mu,\sigma)$ and $\mathcal{H}^{k}_{\Sigma}(\beta, \delta, \lambda,\mu,\sigma)$ of normalized analytic bi-univalent functions defined in the open unit disk and associated with generalized differential operator. Further, we obtain bounds for the second and third Taylor- Maclaurin coefficients of the functions of these subclasses. Also, we obtain some consequences of results obtained.
Keywords and Phrases
Analytic function, Univalent function, Bi-Univalent function, Taylor-Maclaurin series.
A.M.S. subject classification
30C45.
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