Title of article
Coefficient bounds for a generalized subclass of bounded turning functions associated with Sigmoid function
Author/Authors
Singh ، Gagandeep Department of Mathematics - Khalsa College , Singh ، Gurcharanjit Department of Mathematics - G.N.D.U. College
From page
1
To page
10
Abstract
In this paper, we introduce a subclass of analytic functions associated with the Sigmoid function and determine the upper bounds for various coefficient functionals such as Fekete-Szego functional, second Hankel determinant, Zalcman functional and third Hankel determinant. Also, the concept is extended to two-fold and three-fold symmetric functions. The results proved earlier, follow as special cases of the results of this paper.
Keywords
Bounded turning functions , Subordination , Sigmoid unction , Hankel determinant , Coefficient bounds
Journal title
International Journal of Nonlinear Analysis and Applications
Journal title
International Journal of Nonlinear Analysis and Applications
Record number
2773557
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