Results 31 to 40 of about 9,723 (251)
Starlike and convexity properties of q-Bessel-Struve functions
Demonstratio Mathematica, 2022 This paper introduces three different normalization associated with the second and third q-Bessel-Struve functions. We use Hadamard factorizations to determine the radii of starlike and convexity of these functions.
Oraby Karima M., Mansour Zeinab S. I.
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Matematychni Studii, 2022 We study the sharp bound for the third Hankel determinant for the inverse function $f$, when it belongs to of the class of starlike functions with respect to symmetric points.Let $\mathcal{S}^{\ast}_{s}$ be the class of starlike functions with respect to
B. Ráth +3 more
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On the Order of a Starlike Function [PDF]
Transactions of the American Mathematical Society, 1971 It is shown that if f ∈ S f \in S , the class of normalised starlike functions in the unit disc Δ \operatorname {disc} \Delta , then \[ ( i ) lim r → 1
D. K. Thomas, F. Holland
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A study of sharp coefficient bounds for a new subfamily of starlike functions
Journal of Inequalities and Applications, 2021 In this article, by employing the hyperbolic tangent function tanh z , a subfamily S tanh ∗ $\mathcal{S}_{\tanh }^{\ast }$ of starlike functions in the open unit disk D ⊂ C $\mathbb{D}\subset \mathbb{C}$ : D = { z : z ∈ C and | z | < 1 } $$\begin ...
Khalil Ullah +4 more
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Proceedings of the American Mathematical Society, 1985 The authors show that for normalized odd starlike functions f(z) \[ Re(f(z)/S_ n(z,f))>,\quad | z|
Sangita Puri, Ram Lakhan Singh
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On a subclass of starlike functions associated with a vertical strip domain
Journal of Inequalities and Applications, 2019 In this paper, we consider a subclass of starlike functions associated with a vertical strip domain. We obtain several results concerned with integral representations, convolutions, and coefficient inequalities for functions belonging to this class ...
Yong Sun +3 more
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Faber Polynomial Coefficient Estimates for Meromorphic Bi-Starlike Functions
International Journal of Mathematics and Mathematical Sciences, 2013 We consider meromorphic starlike univalent functions that are also bi-starlike and find Faber polynomial coefficient estimates for these types of functions. A function is said to be bi-starlike if both the function and its inverse are starlike univalent.
Samaneh G. Hamidi +2 more
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A unified representation of some starlike and convex harmonic functions with negative coefficients [PDF]
Opuscula Mathematica, 2013 In this paper we introduce a unified representation of starlike and convex harmonic functions with negative coefficients, related to uniformly starlike and uniformly convex analytic functions.
R. M. El-Ashwah +3 more
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Initial logarithmic coefficients for functions starlike with respect to symmetric points
Boletín de la Sociedad Matematica Mexicana, 2021 In this paper, we obtain the bounds of the initial logarithmic coefficients for functions in the classes SS∗\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{
P. Zaprawa
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On Janowski Starlike Functions [PDF]
Journal of Inequalities and Applications, 2007 For analytic functions in the open unit disc with and , applying the fractional calculus for , a new fractional operator is introduced. Further, a new subclass consisting of associated with Janowski function is defined. The objective of the present paper is to discuss some interesting properties of the class .
Çağlar, Mert +4 more
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