Results 71 to 80 of about 998 (123)
A few results on generalized Janowski type functions associated with (j, k)-symmetrical functions
Acta Universitatis Sapientiae: Mathematica, 2016 The aim of the present article is to introduce and study new subclass of Janowski type functions defined using notions of Janowski functions and (j, k)-symmetrical functions.
Al Sarari F. S. M. +3 more
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Subclasses of bi-univalent functions related to shell-like curves connected with Fibonacci numbers
Acta Universitatis Sapientiae: Mathematica, 2018 In this paper, we introduce and investigate new subclasses of bi-univalent functions related to shell-like curves connected with Fibonacci numbers. Furthermore, we find estimates of first two coefficients of functions in these classes. Also, we determine
Güney H. Özlem +2 more
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SOME CONDITION ON A POISSON DISTRIBUTION SERIES TO BE IN SUBCLASSES OF UNIVALENT FUNCTIONS
, 2017 In this paper, we obtained some condition on Poisson distribution series and some related series to be in subclasses of analytic function. Also, we investigate some mapping properties for these subclasses. 2010 Mathematics Subject Classification: 30C45.
R. El-Ashwah, W. Kota
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Bounds for the second Hankel determinant of certain univalent functions
, 2016 Let A denote the class of functions f (z) = z + ∞ ∑ n=2 anz n which are analytic on the open unit disc D = {z ∈ C : |z| < 1}. This paper investigates the analytic functions f ∈ A for which either 2zf ′(z) f (z) − f (−z) or (2zf ′(z))′ (f (z) − f (−z ...
Liew P. H., Fuah K. H, Janteng A
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Some Marx-Strohhacker type results for a class of multivalent functions
, 2017 In this paper, two Marx-Strohhäcker type results are proven for a certain class of analytic and multivalent functions in the open unit disk D. The first result gives the order of multivalent starlikeness for multivalently convex functions of some ...
M. Nunokawa +3 more
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Convex combination of analytic functions
Open Mathematics, 2017 Radii of convexity, starlikeness, lemniscate starlikeness and close-to-convexity are determined for the convex combination of the identity map and a normalized convex function F given by f(z) = α z+(1−α)F(z).
Cho Nak Eun +2 more
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Open Mathematics, 2019 In this paper we define and consider some familiar subsets of analytic functions associated with sine functions in the region of unit disk on the complex plane. For these classes our aim is to find the Hankel determinant of order three.
Arif Muhammad +4 more
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Properties of a new integral operator
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016 In this paper, we derive sufficient conditions for the univalence, star- likeness, convexity and some other properties in the class N (ρ) ; for a new integral operator defined on the space of normalized analytic functions in the open unit disk.
Bucur Roberta +2 more
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On application of differential subordination for Carathéodory functions
Acta Universitatis Sapientiae: Mathematica, 2020 New sufficient conditions involving the properties of analytic functions to belong to the class of Carathéodory functions are investigated. Certain univalence and starlikeness conditions are deduced as special cases of main results.
Lavanya V. Agnes Sagaya Judy +2 more
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Hankel determinant for certain new classes of analytic functions associated the activation functions. [PDF]
Heliyon, 2023 Sun Y +4 more
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