Results 61 to 70 of about 2,697,831 (219)

Convex and starlike meromorphic functions

, 1980
In this paper we study meromorphic univalent functions with a simple pole at p which map the unit disk onto the exterior of convex sets or the exterior of starlike sets. A question raised by Libera and Livingston concerning the equality of two classes of
James Miller
core   +1 more source

Hermitian-Toeplitz determinants and some coefficient functionals for the starlike functions

, 2023
summary:In this paper, we have determined the sharp lower and upper bounds on the fourth-order Hermitian-Toeplitz determinant for starlike functions with real coefficients.
Kumar, Virendra, Das, Laxminarayan, Kumar, Deepak   +2 more
core   +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

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

, 2021
We investigate the starlike, convex and close-to-convex functions of complex order involving generalized multiplier transformations by means of the Hadamard ...
Aouf, Mohamed Kamal, Mohamed Kamal Aouf, Mostafa, Adela Osman, El-Emam, Fatma Z., Adela Osman Mostafa, Fatma Z. El-Emam   +5 more
core   +2 more sources

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

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

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   +2 more sources

On Second Hankel Determinant of the Class of Biunivalent Beta‐Convex Functions Related to a Five‐Leaf Domain

Journal of Function Spaces, Volume 2026, Issue 1, 2026.
In geometric function theory and complex analysis, analytic functions exhibiting geometric symmetry play a fundamental role. However, investigations concerning multileaf domains, particularly those with fivefold rotational symmetry, have been relatively limited.
Suad Al-Mayyahi, Sheza M. El-Deeb, Mohammad El-Ityan, Dalal Alhwikem, Feras Yousef   +4 more
wiley   +1 more source