Results 101 to 110 of about 6,253 (237)

On some subclasses of m-fold symmetric bi-univalent functions

open access: yesCommunications Faculty Of Science University of Ankara Series A1Mathematics and Statistics, 2018
In this work, we introduce two new subclasses S_{{\Sigma}_{m}}({\alpha},{\lambda}) and S_{{\Sigma}_{m}}(\b{eta},{\lambda}) of {\Sigma}_{m} consisting of analytic and m-fold symmetric bi-univalent functions in the open unit disk U. Furthermore, for functions in each of the subclasses introduced in this paper, we obtain the coefficient bounds for |a_{m+1}
ALTINKAYA, Şahsene, YALÇIN, Sibel
openaire   +4 more sources

Coefficient Bounds for a General Subclass of Bi-Univalent Functions

open access: yesLe Matematiche, 2016
In the present investigation, we introduce and investigate a new subclass of the function class Sigma of bi-univalent functions defined in the open unit disc. We find estimates on the coefficients vertical bar a(2)vertical bar and vertical bar a(3)vertical bar for functions in the function class S-Sigma (n, h, lambda).
Yalcin, SİBEL, ALTINKAYA, ŞAHSENE
openaire   +2 more sources

On Coefficient problem for bi-univalent analytic functions

open access: yes, 2017
Estimates for initial coefficients of Taylor-Maclaurin series of bi-univalent functions belonging to certain classes defined by subordination are obtained. Our estimates improve upon the earlier known estimates for second and third coefficient. The bound for the fourth coefficient is new.
Bohra, Nisha, Ravichandran, V.
openaire   +2 more sources

Bi-Univalent Function Classes Defined by Imaginary Error Function and Bernoulli Polynomials

open access: yesAxioms
In recent years, special functions have played a significant role in the investigation of different subclasses within the class of bi-univalent functions. In this work, we present and investigate two new subclasses of bi-univalent functions defined in U={
Ibtisam Aldawish   +3 more
doaj   +1 more source

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