Results 41 to 50 of about 90,034,892 (319)

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

RACSAM, 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, B. Kowalczyk, O. S. Kwon, A. Lecko, Y. Sim   +4 more
semanticscholar   +1 more source

Doubly close-to-convex functions

Journal of Mathematical Analysis and Applications, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dorff, Michael, Naraniecka, Iwona, Szynal, Jan   +2 more
openaire   +2 more sources

Harmonic close‐to‐convex mappings [PDF]

International Journal of Stochastic Analysis, 2000
Sufficient coefficient conditions for complex functions to be close‐to‐convex harmonic or convex harmonic are given. Construction of close‐to‐convex harmonic functions is also studied by looking at transforms of convex analytic functions. Finally, a convolution property for harmonic functions is discussed.
Jahangiri, Jay M., Silverman, Herb
openaire   +2 more sources

On Quasi Convex Functions and Hadamard's Inequality [PDF]

, 2003
In this paper we establish some inequalities of Hadamard’s type involving Godunova-Levin functions, P-functions, quasi-convex functions, Jquasi- convex functions, Wright-convex functions and Wright-quasi-convex ...
Yang, Gou-Sheng, Tseng, Kuei-Lin, Dragomir, Sever S   +2 more
core   +3 more sources

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

International 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 Starlike and Close-to-Convex Functions [PDF]

Proceedings of the London Mathematical Society, 1963
Peer Reviewed ; http://deepblue.lib.umich.edu/bitstream/2027.42/135466/1/plms0290 ...
openaire   +2 more sources

Quasi-convex univalent functions

International Journal of Mathematics and Mathematical Sciences, 1980
In this paper, a new class of normalized univalent functions is introduced. The properties of this class and its relationship with some other subclasses of univalent functions are studied. The functions in this class are close-to-convex.
K. Inayat Noor, D. K. Thomas
doaj   +1 more source

Radius problems for a subclass of close-to-convex univalent functions

International Journal of Mathematics and Mathematical Sciences, 1992
Let P[A,B], −1≤Bβ, 0 ...
Khalida Inayat Noor
doaj   +1 more source

Coefficient inequalities for Janowski type close-to-convex functions associated with Ruscheweyh Derivative Operator

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
The aim of this paper is tointroduce a new subclasses of the Janowski type close-to-convex functionsdefined by Ruscheweyh derivative operator and obtain coefficient boundsbelonging to this class.
Öznur Özkan Kılıç
doaj   +1 more source

LOGARITHMIC COEFFICIENTS OF SOME CLOSE-TO-CONVEX FUNCTIONS [PDF]

Bulletin of the Australian Mathematical Society, 2016
The logarithmic coefficients $\unicode[STIX]{x1D6FE}_{n}$ of an analytic and univalent function $f$ in the unit disc $\mathbb{D}=\{z\in \mathbb{C}:|z|
Md Firoz Ali, A. Vasudevarao
semanticscholar   +1 more source