scholarly journals Application of a subordination theorem associated with certain new generalized subclasses of analytic and univalent functions

2020 ◽  
Vol 28 (1) ◽  
Author(s):  
J. O. Hamzat ◽  
R. M. El-Ashwah
Keyword(s):  
Univalent Functions ◽  
Analytic And Univalent Functions

Application of fractional calculus operators for a new class of univalent functions with negative coefficients defined by Hohlov operator

2010 ◽  
Vol 60 (1) ◽  
Author(s):  
Waggas Atshan
Keyword(s):  
Fractional Calculus ◽  
Unit Disc ◽  
Univalent Functions ◽  
Distortion Theorem ◽  
New Class ◽  
Fractional Calculus Operators ◽  
Coefficient Inequalities ◽  
Analytic And Univalent Functions

AbstractIn this paper, we introduce a new class W(a, b, c, γ, β) which consists of analytic and univalent functions with negative coefficients in the unit disc defined by Hohlov operator, we obtain distortion theorem using fractional calculus techniques for this class. Also coefficient inequalities and some results for this class are obtained.

scholarly journals New Subclasses concerning Some Analytic and Univalent Functions

2017 ◽  
Vol 2017 ◽  
pp. 1-4
Author(s):  
Maslina Darus ◽  
Shigeyoshi Owa
Keyword(s):  
Unit Disc ◽  
Univalent Functions ◽  
Open Unit ◽  
Open Unit Disc ◽  
Analytic And Univalent Functions

Considering a function f(z)=z/1-z2 which is analytic and starlike in the open unit disc U and a function f(z)=z/1-z which is analytic and convex in U, we introduce two new classes Sα⁎(β) and Kα(β) concerning fα(z)=z/1-zα  (α>0). The object of the present paper is to discuss some interesting properties for functions in the classes Sα⁎(β) and Kα(β).

On relation between analytic and univalent functions defined by close-to P class with the function belonging to S class

2017 ◽  
Author(s):  
Ismet Yildiz ◽  
Neslihan Uyanik ◽  
Hilal Albayrak ◽  
Hilal Ay
Keyword(s):  
Univalent Functions ◽  
Analytic And Univalent Functions

scholarly journals Coefficient Inequalities of Functions Associated with Petal Type Domains

Mathematics ◽  
2018 ◽  
Vol 6 (12) ◽  
pp. 298 ◽  
Author(s):  
Sarfraz Malik ◽  
Shahid Mahmood ◽  
Mohsan Raza ◽  
Sumbal Farman ◽  
Saira Zainab
Keyword(s):  
Taylor Series ◽  
Upper Bound ◽  
Analytic Functions ◽  
Univalent Functions ◽  
Series Representation ◽  
Functional Inequalities ◽  
Major Interest ◽  
Coefficient Inequalities ◽  
Inverse Functions ◽  
Analytic And Univalent Functions

In the theory of analytic and univalent functions, coefficients of functions’ Taylor series representation and their related functional inequalities are of major interest and how they estimate functions’ growth in their specified domains. One of the important and useful functional inequalities is the Fekete-Szegö inequality. In this work, we aim to analyze the Fekete-Szegö functional and to find its upper bound for certain analytic functions which give parabolic and petal type regions as image domains. Coefficient inequalities and the Fekete-Szegö inequality of inverse functions to these certain analytic functions are also established in this work.

scholarly journals Support points of some classes of analytic and univalent functions

2021 ◽  
Vol 359 (4) ◽  
pp. 465-473
Author(s):  
Vasudevarao Allu ◽  
Abhishek Pandey
Keyword(s):  
Univalent Functions ◽  
Support Points ◽  
Analytic And Univalent Functions

scholarly journals Iterated integral transforms of Caratheodory functions and their applications to analytic and univalent functions

2006 ◽  
Vol 37 (4) ◽  
pp. 355-366
Author(s):  
K. O. Babalola ◽  
T. O. Opoola
Keyword(s):  
Univalent Functions ◽  
Integral Transforms ◽  
Carathéodory Functions ◽  
Iterated Integral ◽  
Analytic And Univalent Functions

In this paper we develop and study some integral transforms of Caratheodory functions. We apply the transforms to study certain other classes of analytic and univalent functions both to obtain new results and provide new proofs of some known ones.

scholarly journals Quasi-Hadamard product of a generalized class of analytic and univalent functions

2010 ◽  
Vol 23 (4) ◽  
pp. 347-350 ◽  
Author(s):  
B.A. Frasin ◽  
M.K. Aouf
Keyword(s):  
Hadamard Product ◽  
Univalent Functions ◽  
Analytic And Univalent Functions

AN APPLICATION OF SCHUR’S ALGORITHM TO VARIABILITY REGIONS OF CERTAIN ANALYTIC FUNCTIONS II

2021 ◽  
pp. 1-14
Author(s):  
MD FIROZ ALI ◽  
VASUDEVARAO ALLU ◽  
HIROSHI YANAGIHARA
Keyword(s):  
Analytic Functions ◽  
Univalent Functions ◽  
Convex Domains ◽  
Schur Algorithm ◽  
Variability Region ◽  
Analytic And Univalent Functions

Abstract We extend our study of variability regions, Ali et al. [‘An application of Schur algorithm to variability regions of certain analytic functions–I’, Comput. Methods Funct. Theory, to appear] from convex domains to starlike domains. Let $\mathcal {CV}(\Omega )$ be the class of analytic functions f in ${\mathbb D}$ with $f(0)=f'(0)-1=0$ satisfying $1+zf''(z)/f'(z) \in {\Omega }$ . As an application of the main result, we determine the variability region of $\log f'(z_0)$ when f ranges over $\mathcal {CV}(\Omega )$ . By choosing a particular $\Omega $ , we obtain the precise variability regions of $\log f'(z_0)$ for some well-known subclasses of analytic and univalent functions.

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