Results 91 to 100 of about 5,311 (200)

Univalent and Starlike Properties for Generalized Struve Function

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2016
We derive conditions on the parameters p, b, and c so that the function zwp,b,c(z), where wp,b,c(z) is the normalized form of generalized Struve function, belongs to the class S1⁎(α). Also, some sufficient conditions for the function zwp,b,c(z), to be in
Aaisha Farzana Habibullah   +2 more
doaj   +1 more source

Kudriasov Type Univalence Criteria for Some Integral Operators

open access: yesAbstract and Applied Analysis, 2013
We consider some integral operators defined by analytic functions in the open unit disk and derive new univalence criteria for these operators, using Kudriasov condition for a function to be univalent.
Virgil Pescar, Nicoleta Breaz
doaj   +1 more source

Radii of covering disks for locally univalent harmonic mappings

open access: yes, 2016
For a univalent smooth mapping f of the unit disk D of complex plane onto the manifold f(D) , let df(z0) be the radius of the largest univalent disk on the manifold f(D) centered at f(z0) (| z0| \u3c 1).
Graf, Sergey Yu   +2 more
core   +1 more source

Initial Coefficient Estimates for Bi-Univalent Functions Related to Generalized Telephone Numbers

open access: yesJournal of Mathematics
This study defines three novel classes of bi-univalent functions connected to generalized telephone numbers for the first time. We produced assessments about the Taylor–Maclaurin coefficients a2 and a3 and Fekete–Szegö functional problems for functions ...
Gangadharan Murugusundaramoorthy   +4 more
doaj   +1 more source

Coefficient Bounds for Certain Classes of Analytic and Univalent functions as Related to Sigmoid Function [PDF]

open access: yes, 2014
In this work, the authors investigated certain classes of analytic and univalent functions in terms of their coefficient bounds as related to activation sig- moid function with respect to symmetric and conjugate ...
Gbolagade, A.M.   +2 more
core  

Sharp Estimates of Logarithmic Coefficients of Certain Class of Analytic Functions

open access: yesپژوهش‌های ریاضی, 2020
Introduction Let  be the open unit disc in the complex plane  and  be the class of all functions of  which are analytic and normalized in  The subclass of consisting of all univalent functions  in  is denoted by  We say that a function  is said to be ...
Rahim Kargar, Ali Ebadian, Nader Kanzi
doaj  

Univalent functions with univalent derivatives [PDF]

open access: yesBulletin of the American Mathematical Society, 1969
Shah, S. M., Trimble, S. Y.
openaire   +2 more sources

Subordination Properties of Bi-Univalent Functions Involving Horadam Polynomials

open access: yesJournal of Function Spaces
In this research, we investigate a family of q-extensions defined on an open unit disk, which is based on bi-univalent functions associated with differential subordination.
Ebrahim Amini, Shrideh Al-Omari
doaj   +1 more source

Some Results on the Integral Means of the Derivative of a Univalent Function

open access: yes, 2014
The purpose of this research paper to show all the possible values of the pth- power of the integrable function which make the integral means of the derivative of univalent function exists and ...
Alhily, Shatha S., Shatha S. Alhily
core  

Coefficient inequality for certain subclasses of univalent functions [PDF]

open access: yes, 2005
Let f (z)= z+ ∑_(n=2)^∞▒〖a_n z^n 〗 an analytic and univalent function in the unit disk D = {z├∶┤|├ z┤| z < ├ 1}. The purpose of the present paper is to introduce the functional |a_4-μa^(2/3) | when µ is real. We give sharp upper bounds for |a_4-μa^(2/3)
Aini Janteng   +2 more
core  

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