Results 81 to 90 of about 5,311 (200)

Linear Combinations of Harmonic Univalent Mappings

open access: yes, 2021
Many properties are known about analytic functions, however the class of harmonic functions which are the sum of an analytic function and the conjugate of an analytic function is less understood.
Nguyen, Dennis
core  

The radius of convexity of certain analytic functions II

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1980
In [2], MacGregor found the radius of convexity of the functions f(z)=z+a2z2+a3z3+…, analytic and univalent such that |f′(z)−1|
J. S. Ratti
doaj   +1 more source

Univalent Functions

open access: yes, 1962
A function f(z) is said to be univalent in a region G if and only if f(z1) = f(s2 ) in G implies z1 = z2 whenever z1 and z2 are any two points in G. Another way of stating this is that a univalent function in G is characterized by the fact that it takes ...
Robinson, James A.
core  

The Schwarzian derivative and univalent functions

open access: yes, 1972
In this paper we prove under certain conditions the function w = f ( z ) w = f(z) is univalent in | z | > 1 |z|
Shigeo Ozaki, Mamoru Nunokawa
core   +1 more source

Subclasses of Bi-Univalent Functions Defined by Frasin Differential Operator

open access: yes, 2020
Let Ω denote the class of functions f ( z ) = z + a 2 z 2 + a 3 z 3 + ⋯ belonging to the normalized analytic function class A in the open unit disk U = z : z < 1 , which are bi-univalent in U , that ...
Ibtisam Aldawish   +2 more
core   +1 more source

On the coefficients of univalent functions. [PDF]

open access: yesMichigan Mathematical Journal, 1967
Clunie, J., Pommerenke, Ch.
openaire   +4 more sources

Univalent Functions with Univalent Derivatives III [PDF]

open access: yesIndiana University Mathematics Journal, 1969
S. M. Shah, S. Y. Trimble
openaire   +2 more sources

On Use of Meijer's G-functions In The Theory of Univalent Functions [PDF]

open access: yes, 2015
Using some properties of Meijer's G-functions and univalent functions, in this paper some definitions, transformations and theorems in univalent function theory are discussed and then reformulated in the language of Meijer's G-functions.
Pishkoo, Amir
core   +1 more source

Properties of a Linear Operator Involving Lambert Series and Rabotnov Function

open access: yesInternational Journal of Mathematics and Mathematical Sciences
This work is an attempt to apply Lambert series in the theory of univalent functions. We first consider the Hadamard product of Rabotnov function and Lambert series with coefficients derived from the arithmetic function σn to introduce a normalized ...
Jamal Salah
doaj   +1 more source

Exploring Bi-Univalent Classes via q-Derivatives and Bivariate Fibonacci Polynomials

open access: yesMathematics
The q-calculus framework has emerged as a powerful tool in geometric function theory, enabling refined analysis of analytic and bi-univalent functions.
Aruna Mogarala Guruvaya   +3 more
doaj   +1 more source

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