Results 31 to 40 of about 5,311 (200)

On the Existence of Functions being Univalent in Half-plane together with their Derivatives

Nonlinear Analysis, 2001
In articles [1]-[3] a class of functions being univalent in unit disc with all their derivatives was investigated. It was proved such functions exist and must be the entire functions of exponential type.
J. Kirjackis
doaj   +1 more source

Estimating coefficients for certain subclasses of meromorphic and bi-univalent functions

Journal of Inequalities and Applications, 2018
In the present paper, we introduce two interesting subclasses of meromorphic and bi-univalent functions defined on Δ={z:z∈C ...
F. Müge Sakar
doaj   +1 more source

On a class of univalent functions

Applied Mathematics Letters, 2012
AbstractLet A be the class of analytic functions in the unit disk D with the normalization f(0)=f′(0)−1=0. Denote by N the class of functions f∈A which satisfy the condition |−z3(zf(z))‴+f′(z)(zf(z))2−1|≤1,z∈D. We show that functions in N are univalent in D but not necessarily starlike.
Milutin Obradovic, Saminathan Ponnusamy
openaire   +2 more sources

Certain Classes of Univalent Functions With Negative Coefficients Defined By General Linear Operator

Tikrit Journal of Pure Science, 2019
In this study, a subclass of an univalent function with negative coefficients which is defined by anew general Linear operator have been introduced.
Mazin Sh.Mahmoud, Abdul Rahman S.Juma, Raheam A. Mansor Al-Saphory   +2 more
doaj   +1 more source

Meromorphic univalent function with negative coefficient

International Journal of Mathematics and Mathematical Sciences, 1994
Let Mn be the classes of regular functions f(z)=z−1+a0+a1z+… defined in the annulus ...
A. Dernek
doaj   +1 more source

Application of Gegenbauer Polynomials with Two Variables to Bi-univalency of Generalized Discrete Probability Distribution Via Zero-Truncated Poisson Distribution Series [PDF]

Sahand Communications in Mathematical Analysis
The present study is unique in exploring bi-univalent functions, which has recently garnered attention from many researchers in Geometric Function Theory (GFT).
Tunji Ibrahim Awolere, Abiodun Tinuoye Oladipo, Şahsene Altınkaya   +2 more
doaj   +1 more source

On Analytic Univalent Function Associated With Tangent Hyperbolic Function [PDF]

Sahand Communications in Mathematical Analysis
Within this article, we propose some sufficient conditions for analytic functions correlated with tangent hyperbolic function. We investigate convolution conditions, integral conservation properties and coefficient sufficiency criteria for this family of
Gehan Elyazyd, Matthew Oluwayemi, Atef Elmahdy, Hanan Darwish   +3 more
doaj   +1 more source

A new family of analytic functions associated with multiplier transformation

Scientific African, 2021
Some geometric properties of a certain univalent function in the unit disk are considered in this work and the results extend some known results in the literature.
M.O. Oluwayemi, Imran Faisal
doaj   +1 more source

An equation for complex fractional diffusion created by the Struve function with a T-symmetric univalent solution

Demonstratio Mathematica
A TT-symmetric univalent function is a complex valued function that is conformally mapping the unit disk onto itself and satisfies the symmetry condition ϕ[T](ζ)=[ϕ(ζT)]1∕T{\phi }^{\left[T]}\left(\zeta )={\left[\phi \left({\zeta }^{T})]}^{1/T} for all ζ ...
Ibrahim Rabha W., Baleanu Dumitru
doaj   +1 more source

Coefficient Bounds for Certain Subclasses of Bi-Univalent Function [PDF]

, 2013
We introduce two new subclasses of the function class Σ of bi-univalent functions defined in the open unit disc. Furthermore, we find estimates on the coefficients |a2| and |a3| for functions in these new subclasses.
N. Magesh, V. Prameela, G. Murugusundaramoorthy   +2 more
core   +1 more source