Results 61 to 70 of about 2,822,582 (218)

Hankel determinant for functions starlike and convex with respect to symmetric points [PDF]

, 2006
Sakaguchi (1959) introduced the class of functions S*s , starlike with respect to symmetric points. In 1977, Das and Singh introduced similar class of functions Cs , convex with respect to symmetric points.
Maslina Darus,, Aini Janteng, Suzeini Abdul Halim, Suzeini Abdul Halim,, Maslina Darus, Aini Janteng,   +5 more
core  

On classes of non-univalent functions influenced by the multiplicative derivative

Frontiers in Applied Mathematics and Statistics
In this article, we extend studies on the class of starlike functions, motivated by the definition of the multiplicative derivative. In this direction, we define a new class by combining characterizations of starlike functions and a recently studied ...
Daniel Breaz, Kadhavoor R. Karthikeyan, Dharmaraj Mohankumar   +2 more
doaj   +1 more source

On Logarithmic and Inverse Coefficients for Sakaguchi‐Type Starlike Functions Subordinated to a Petal‐Shaped Domain

Journal of Function Spaces, Volume 2026, Issue 1, 2026.
In this paper, we study several important coefficient problems for the class Sp∗ of Sakaguchi‐type starlike functions subordinated to a petal‐shaped domain. We obtain a collection of sharp bounds that extend and refine known results in geometric function theory.
Adel A. Attiya, Mohammad El-Ityan, Muhammad Abbas, Muntasir Suhail, Daniel Breaz, Abdul Rauf Khan   +5 more
wiley   +1 more source

The sharp bound of the third Hankel determinants for inverse of starlike functions with respect to symmetric points

Математичні Студії, 2022
We study the sharp bound for the third Hankel determinant for the inverse function $f$, when it belongs to of the class of starlike functions with respect to symmetric points.
B. Rath, D. V. Krishna, K. S. Kumar, G. K. S. Viswanadh   +3 more
doaj   +1 more source

Starlike meromorphic functions

, 1972
In this paper we study meromorphic univalent functions which map the unit disk onto the exterior of a domain which is starlike with respect to some finite point different from the origin.
James Miller
core   +1 more source

A certain subclass of meromorphically q-starlike functions associated with the Janowski functions

Journal of Inequalities and Applications, 2019
In this paper, the authors introduce a new subclass of meromorphic q-starlike functions which are associated with the Janowski functions. A characterization of meromorphically q-starlike functions associated with the Janowski functions has been obtained ...
Shahid Mahmood, Qazi Zahoor Ahmad, H. M. Srivastava, Nazar Khan, Bilal Khan, Muhammad Tahir   +5 more
doaj   +1 more source

Starlike Functions With Respect to a Boundary Point Connected With Bounded Radius Rotation

Journal of Function Spaces, Volume 2026, Issue 1, 2026.
In the current article, we introduce a new subclass of univalent function Gμ with bounded radius rotation. For this new class, the authors establish many interesting relations between these classes and existing classes. Furthermore, authors try to find coefficient estimations for this new subclass.
Alhanouf Alburaikan, Prathviraj Sharma, S. Sivasubramanian, Jongsuk Ro, Sheza M. El-Deeb, Abdul Rauf Khan   +5 more
wiley   +1 more source

Extremal functions for starlike functions and convex functions [PDF]

, 2017
In this paper, we obtain new extremal functions for starlike functions and convex functions on the range    0???
Yildiz, İsmet, Mert, Oya, Zorlu, Neslihan, Uyanik, Neslihan   +3 more
core   +1 more source

A Class of Starlike Functions

Rocky Mountain Journal of Mathematics, 1993
Let \(S^*\) be the usual class of starlike functions, i.e. \(f(z)\) of the form \(z+a_ 2 z^ 2\dots\) which are analytic and univalent in the unit disc \(U\) and which map \(U\) onto a domain starshaped with respect to the origin.
openaire   +2 more sources

Coefficient Inequalities Related With Apple‐Like Functions

Journal of Function Spaces, Volume 2026, Issue 1, 2026.
Several subfamilies of Ma and Minda starlike and convex functions have been examined differently through individual generating functions in the literature. However, little or no effort has been devoted to subfamily arising from the product of these generating functions.
Aiman Sana, Afis Saliu, Sadia Riaz, Yufeng Xu   +3 more
wiley   +1 more source