Results 21 to 30 of about 35,490 (309)

Properties of Functions Involving Struve Function

open access: yesMathematics, 2018
Let f ( z ) = z + ∑ n = 2 ∞ a n z n and g p , b , c ( z ) = z + ∑ n = 2 ∞ ( − c 4 ) n − 1 ( 3 2 ) n − 1 ( k ) n − 1 z n with
Jonathan Aaron Azlan Mosiun   +1 more
doaj   +1 more source

Hölder Inequalities for a Generalized Subclass of Univalent Functions Involving Borel Distributions

open access: yesMathematics, 2022
In this article, by making use of the Borel distributions series, we introduce a new family of normalized holomorphic functions in the open unit disk and investigate necessary and sufficient conditions for functions f to be in this new class. Furthermore,
Gangadharan Murugusundaramoorthy   +1 more
doaj   +1 more source

Gamma-Bazilevič Functions

open access: yesMathematics, 2020
For γ ≥ 0 and α ≥ 0 , we introduce the class B 1 γ ( α ) of Gamma−Bazilevič functions defined for z ∈ D by R e z f ′ ( z ) f ( z ) 1 − α
Sa’adatul Fitri, Derek K. Thomas
doaj   +1 more source

Initial coefficient bounds for certain new subclasses of bi-univalent functions with bounded boundary rotation

open access: yesAIMS Mathematics, 2023
In the current article, we introduced new subclasses of bi-univalent functions associated with bounded boundary rotation. For these new classes, the authors first obtained two initial coefficient bounds.
Prathviraj Sharma   +2 more
doaj   +1 more source

ON NORMALIZED RABOTNOV FUNCTION ASSOCIATED WITH CERTAIN SUBCLASSES OF ANALYTIC FUNCTIONS

open access: yesПроблемы анализа, 2023
In this paper, we investigate some sufficient conditions for the normalized Rabotnov function to be in certain subclasses of analytic and univalent functions. The usefulness of the results is depicted by some corollaries and examples.
S. Sumer Eker, B. ¸Seker, S. Ece
doaj  

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

NEIGHBOURHOODS OF UNIVALENT FUNCTIONS [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2010
AbstractThe main result shows that a small perturbation of a univalent function is again a univalent function, hence a univalent function has a neighbourhood consisting entirely of univalent functions. For the particular choice of a linear function in the hypothesis of the main theorem, we obtain a corollary which is equivalent to the classical Noshiro–
Pascu, Mihai N., Pascu, Nicolae R.
openaire   +2 more sources

Properties of Functions Formed Using the Sakaguchi and Gao-Zhou Concept

open access: yesMathematics, 2020
This paper introduces a new class related to close-to-convex functions denoted by K s k , N . This class is based on combining the concepts of starlike functions with respect to N-ply symmetry points of the order α , introduced by ...
Jonathan Aaron Azlan Mosiun   +1 more
doaj   +1 more source

Univalent functions with univalent Gelfond-Leontev derivatives [PDF]

open access: yesBulletin of the Australian Mathematical Society, 1984
Let be a nondecreasing sequence of positive numbers. We consider Gelfond-Leontev derivative Df(z), of a function , defined by for univalence and growth properties, and extend some results of Shah and Trimble. Set en = {d1d2 … dn), n≥l, e0 = 1, . Let r be the radius of convergence of p(z). We state parts of Theorem 1 and Corollaries. Let f and all Dkf,
Juneja, O. P., Shah, S. M.
openaire   +1 more source

Certain subclasses of Spiral-like univalent functions related with Pascal distribution series

open access: yesMoroccan Journal of Pure and Applied Analysis, 2021
The purpose of the present paper is to find the sufficient conditions for the subclasses of analytic functions associated with Pascal distribution to be in subclasses of spiral-like univalent functions and inclusion relations for such subclasses in the ...
Murugusundaramoorthy Gangadharan
doaj   +1 more source

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