A Certain Class of Function Analytic and Subordinate to the Modified Sigmoid Function

A certain class of functions, analytic and subordinate to the modified sigmoid function, is defined. Coefficient inequalities, Toeplitz, distortion, and Fekete-Szegö problems of this class were investigated. It was observed that the results obtained provide extensions to many known results in geometric function theory. Special cases of the results were equally highlighted.

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Publication Details

Journal
Earthline Journal of Mathematical Sciences
Published
2025-05-06
DOI
https://doi.org/10.34198/ejms.15425.639647
Primary Topic
Analytic and geometric function theory
Type
article
Field-Weighted Citation Impact
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article

A Certain Class of Function Analytic and Subordinate to the Modified Sigmoid Function

Fadipe-Joseph Olubunmi A., Ezugorie Obiageri M., Z. Ishiaku
Earthline Journal of Mathematical Sciences
Analytic and geometric function theory
article

A Certain Class of Function Analytic and Subordinate to the Modified Sigmoid Function

Fadipe-Joseph Olubunmi A., Ezugorie Obiageri M., Z. Ishiaku
article en

Abstract

A certain class of functions, analytic and subordinate to the modified sigmoid function, is defined. Coefficient inequalities, Toeplitz, distortion, and Fekete-Szegö problems of this class were investigated. It was observed that the results obtained provide extensions to many known results in geometric function theory. Special cases of the results were equally highlighted.

Earthline Journal of Mathematical Sciences
University of Ilorin (NG)
Openalex Percentile: Top 85%
Analytic and geometric function theory
DOIOpen Access PDFOpenAlex
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A Certain Class of Function Analytic and Subordinate to the Modified Sigmoid Function — Fadipe-Joseph Olubunmi A., Ezugorie Obiageri M., et al. · Earthline Journal of Mathematical Sciences (2025) | TGRS Research Map | TGRS