Results 11 to 20 of about 1,700,243 (293)

Doubly close-to-convex functions

Journal of Mathematical Analysis and Applications, 2004
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Dorff, Michael, Naraniecka, Iwona, Szynal, Jan   +2 more
openaire   +3 more sources

Coefficient Conditions for Harmonic Close-to-Convex Functions [PDF]

Abstract and Applied Analysis, 2012
New sufficient conditions, concerned with the coefficients of harmonic functions 𝑓(𝑧)=ℎ(𝑧)+𝑔(𝑧) in the open unit disk 𝕌 normalized by 𝑓(0)=ℎ(0)=ℎ(0)−1=0, for 𝑓(𝑧) to be harmonic close-to-convex functions are discussed.
Toshio Hayami
doaj   +2 more sources

The Third Logarithmic Coefficient for Certain Close-to-Convex Functions

Journal of Mathematics, 2022
The logarithmic coefficients γn of a normalized analytic functions f are defined by log  fz/z=2∑n=1∞γnzn. For certain close-to-convex functions fz=z+a2z2+⋯, Cho et al. (on the third logarithmic coefficient in some subclasses of close-to-convex functions)
Najla M. Alarifi
doaj   +2 more sources

Upper Bound of the Third Hankel Determinant for a Subclass of Close-to-Convex Functions Associated with the Lemniscate of Bernoulli

Mathematics, 2019
In this paper, our aim is to define a new subclass of close-to-convex functions in the open unit disk U that are related with the right half of the lemniscate of Bernoulli.
Hari M. Srivastava, Qazi Zahoor Ahmad, Maslina Darus, Nazar Khan, Bilal Khan, Naveed Zaman, Hasrat Hussain Shah   +6 more
doaj   +3 more sources

On Some Problems of Strongly Ozaki Close-to-Convex Functions

Journal of Function Spaces, 2020
The purpose of the current paper is to investigate some geometric properties of the class FOν,γ, called strongly Ozaki close-to-convex functions, such as strongly starlikeness and close-to-convexity.
Zahra Maleki, Saeid Shams, Ali Ebadian, Ebrahim Analouei Adegani   +3 more
doaj   +2 more sources

A note on certain subclass of close-to-convex functions

International Journal of Mathematics and Mathematical Sciences, 1988
The object of the present paper is to show a result for functions belonging to class P′(1−α,0) which is a subclass of close-to-convex functions in the unit disk U.
Shigeyoshi Owa, Liu Liquan, Wancang Ma
doaj   +2 more sources

New Criteria for Univalent‎, ‎Starlike‎, ‎Convex‎, ‎and Close-to-Convex Functions on the Unit Disk [PDF]

Mathematics Interdisciplinary Research, 2020
In the present paper, we introduce and investigate three interesting superclasses SD, SD* and KD of analytic, normalized and univalent functions in the open unit disk D.
Mohammad Reza Yasamian, Ali Ebadian, Mohammad Reza Foroutan   +2 more
doaj   +1 more source

On Janowski Close-to-Convex Functions Associated with Conic Regions

International Journal of Analysis and Applications, 2020
In this work, we introduce and investigate a class of analytic functions which is a subclass of close-to-convex functions of Janowski type and related to conic regions.
Afis Saliu, Khalida Inayat Noor
doaj   +2 more sources

On a Subclass of Close-to-Convex Functions [PDF]

Bulletin of the Iranian Mathematical Society, 2018
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Chung, Yao Liang, Mohd, Maisarah Haji, Lee, See Keong   +2 more
openaire   +2 more sources

Geometric Properties of a Certain Class of Mittag–Leffler-Type Functions

Fractal and Fractional, 2022
The main objective of this paper is to establish some sufficient conditions so that a class of normalized Mittag–Leffler-type functions satisfies several geometric properties such as starlikeness, convexity, close-to-convexity, and uniform convexity ...
Hari M. Srivastava, Anish Kumar, Sourav Das, Khaled Mehrez   +3 more
doaj   +1 more source