Results 41 to 50 of about 63,681 (326)

Starlike and convex functions of complex order involving generalized multiplier transformations [PDF]

open access: yesMathematica Bohemica, 2021
We investigate the starlike, convex and close-to-convex functions of complex order involving generalized multiplier transformations by means of the Hadamard product.
Adela Osman Mostafa   +2 more
doaj   +1 more source

On a New Class of Bi-Close-to-Convex Functions with Bounded Boundary Rotation

open access: yesMathematics, 2023
In the current article, we introduce a new class of bi-close-to-convex functions with bounded boundary rotation. For this new class, the authors obtain the first three initial coefficient bounds of the newly defined bi-close-to-convex functions with ...
Daniel Breaz   +3 more
doaj   +1 more source

An application of the generalized Bessel function [PDF]

open access: yesMathematica Bohemica, 2017
We introduce and study some new subclasses of starlike, convex and close-to-convex functions defined by the generalized Bessel operator. Inclusion relations are established and integral operator in these subclasses is discussed.
Hanan Darwish   +2 more
doaj   +1 more source

On some geometric properties for the combination of generalized Lommel–Wright function

open access: yesJournal of Inequalities and Applications, 2021
The scope of our investigation is to study the geometric properties of the normalized form of the combination of generalized Lommel–Wright function J ν , λ μ , m $J_{\nu ,\lambda }^{\mu ,m}$ defined by J ν , λ μ , m ( z ) : = Γ m ( λ + 1 ) Γ ( λ + ν + 1 )
Hanaa M. Zayed, Teodor Bulboacă
doaj   +1 more source

Doubly close-to-convex functions

open access: yesJournal of Mathematical Analysis and Applications, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dorff, Michael   +2 more
openaire   +2 more sources

On alpha-close-to-convex functions of order beta

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
Let Mβ(α)[α≥0   and   β≥0] denote the class of all functionsf(z)=z+∑n=2∞anznanalytic in the unit disc U with f′(z)f(z)/z≠0 and which satisfy for z=reiθ∈U the condition ∫θ1θ2Re{(1−α)zf′(z)f(z)+α(1+zf″(z)f′(z))}dθ>−βπ for all θ2>θ1.
M. A. Nasr
doaj   +1 more source

On the third logarithmic coefficient in some subclasses of close-to-convex functions

open access: yesRACSAM, 2020
For analytic functions f in the unit disk D\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt}
N. Cho   +4 more
semanticscholar   +1 more source

Injectivity of sections of convex harmonic mappings and convolution theorems [PDF]

open access: yes, 2015
In the article the authors consider the class ${\mathcal H}_0$ of sense-preserving harmonic functions $f=h+\overline{g}$ defined in the unit disk $|z|
A. W. Goodman   +36 more
core   +2 more sources

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