Results 21 to 30 of about 23,628 (307)

Initial Coefficients of Biunivalent Functions

Abstract and Applied Analysis, 2014
An analytic function f defined on the open unit disk is biunivalent if the function f and its inverse f-1 are univalent in 𝔻. Estimates for the initial coefficients of biunivalent functions f are investigated when f and f-1, respectively, belong to some ...
See Keong Lee, V. Ravichandran, Shamani Supramaniam   +2 more
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

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

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

Nonvanishing Meromorphic Univalent Functions [PDF]

Proceedings of the American Mathematical Society, 1988
This note studies the best constants s s such that the function k ( z ) = z + 2 + 1 / z k(z) = z + 2 + 1/z solves the linear coefficient problems max Re ⁡ { s
Abu-Muhanna, Yusuf, Schober, Glenn
openaire   +2 more sources

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

Applications of a certain q-integral operator to the subclasses of analytic and bi-univalent functions

AIMS Mathematics, 2021
In the present investigation, our aim is to define a generalized subclass of analytic and bi-univalent functions associated with a certain $q$-integral operator in the open unit disk $\mathbb{U}$.
Bilal Khan, H. M. Srivastava, Muhammad Tahir, Maslina Darus, Qazi Zahoor Ahmad, Nazar Khan   +5 more
doaj   +1 more source

Quasi‐convex univalent functions [PDF]

International Journal of Mathematics and Mathematical Sciences, 1979
In this paper, a new class of normalized univalent functions is introduced. The properties of this class and its relationship with some other subclasses of univalent functions are studied. The functions in this class are close‐to‐convex.
K. Inayat Noor, D. K. Thomas
openaire   +2 more sources

Radii of covering disks for locally univalent harmonic mappings

, 2016
For a univalent smooth mapping $f$ of the unit disk $\ID$ of complex plane onto the manifold $f(\ID)$, let $d_f(z_0)$ be the radius of the largest univalent disk on the manifold $f(\ID)$ centered at $f(z_0)$ ($|z_0|
Graf, Sergey Yu., Ponnusamy, Saminathan, Starkov, Victor V.   +2 more
core   +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