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The Generalized Janowski Starlike and Close-to-Starlike Log-Harmonic Mappings [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2011
Motivated by the success of the Janowski starlike function, we consider here closely related functions for log-harmonic mappings of the form 𝑓(𝑧)=𝑧ℎ(𝑧)𝑔(𝑧) defined on the open unit disc 𝑈.
Maisarah Haji Mohd, Maslina Darus
doaj   +3 more sources

First-Order Differential Subordinations and Their Applications

open access: yesAxioms, 2023
In this paper, we consider some relations related to the representations of starlike and convex functions, and obtain some sufficient conditions for starlike and convex functions by using the theory of differential subordination.
Ali Ebadian   +4 more
doaj   +1 more source

Sufficient Conditions for Starlike Functions Associated with the Lemniscate of Bernoulli [PDF]

open access: yes, 2013
Let -1\leq ...
Cho, Nak Eun   +3 more
core   +2 more sources

Subordinations and Norm Estimates for Functions Associated with Ma-Minda Subclasses

open access: yesMathematics, 2022
For a function p analytic in the open unit disc and satisfying p(0)=1, we prove certain subordination implications of the first order differential subordination 1+zp′(z)≺1+Mz, which provides sufficient conditions for a function to belong to various ...
Aaisha Farzana Habibullah   +2 more
doaj   +1 more source

On a subclass of starlike functions associated with a vertical strip domain

open access: yesJournal of Inequalities and Applications, 2019
In this paper, we consider a subclass of starlike functions associated with a vertical strip domain. We obtain several results concerned with integral representations, convolutions, and coefficient inequalities for functions belonging to this class ...
Yong Sun   +3 more
doaj   +1 more source

Faber Polynomial Coefficient Estimates for Meromorphic Bi-Starlike Functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2013
We consider meromorphic starlike univalent functions that are also bi-starlike and find Faber polynomial coefficient estimates for these types of functions. A function is said to be bi-starlike if both the function and its inverse are starlike univalent.
Samaneh G. Hamidi   +2 more
doaj   +1 more source

Radius Problems for Starlike Functions Associated with the Tan Hyperbolic Function

open access: yesJournal of Function Spaces, 2021
The aim of this particular article is at studying a holomorphic function f defined on the open-unit disc D=z∈ℂ ...
Khalil Ullah   +4 more
doaj   +1 more source

Research on Geometric Mappings in Complex Systems Analysis

open access: yesDiscrete Dynamics in Nature and Society, 2016
We mainly discuss the properties of a new subclass of starlike functions, namely, almost starlike functions of complex order λ, in one and several complex variables.
Yanyan Cui, Chaojun Wang, Sifeng Zhu
doaj   +1 more source

Certain Properties of Some Families of Generalized Starlike Functions with respect to q-Calculus

open access: yesAbstract and Applied Analysis, 2016
By making use of the concept of q-calculus, various types of generalized starlike functions of order α were introduced and studied from different viewpoints.
Ben Wongsaijai, Nattakorn Sukantamala
doaj   +1 more source

On Quasi-inversions [PDF]

open access: yes, 2015
Given a bounded domain $D \subset {\mathbb R}^n$ strictly starlike with respect to $0 \in D\,,$ we define a quasi-inversion w.r.t. the boundary $\partial D \,.$ We show that the quasi-inversion is bi-Lipschitz w.r.t.
Kalaj, David   +2 more
core   +1 more source

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