Results 21 to 30 of about 111 (99)

On differential subordinations for a class of analytic functions defined by a linear operator

International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 42, Page 2219-2230, 2004., 2004
We obtain several results concerning the differential subordination between analytic functions and a linear operator defined for a certain family of analytic functions which are introduced here by means of these linear operators. Also, some special cases are considered.
V. Ravichandran, Herb Silverman, S. Sivaprasad Kumar, K. G. Subramanian   +3 more
wiley   +1 more source

Certain sufficient conditions for phi-like functions in a parabolic region

, 2023
To obtain the main result of the present paper we use the technique of differential subordination. As special cases of our main result, we obtain sufficient conditions for \(f\in A\) to be φ -like, starlike and close-to-convex in a parabolic region ...
Richa Brar, Hardeep Kaur, KAUR, Hardeep, Sukhwinder Singh Billing, BILLING, Sukhwinder Singh, BRAR, Richa   +5 more
core   +1 more source

Contractive curves

International Journal of Mathematics and Mathematical Sciences, Volume 30, Issue 4, Page 227-238, 2002., 2002
We discuss the dynamics of the correspondences associated to those plane curves whose local sections contract the Poincaré metric in a hyperbolic planar domain.
Araceli Bonifant, Marius Dabija
wiley   +1 more source

Spatial decay estimates for a class of nonlinear damped hyperbolic equations

International Journal of Mathematics and Mathematical Sciences, Volume 27, Issue 1, Page 17-26, 2001., 2001
This paper is concerned with investigating the spatial decay estimates for a class of nonlinear damped hyperbolic equations. In addition, we compare the solutions of two‐dimensional wave equations with different damped coefficients and establish an explicit inequality which displays continuous dependence on this coefficient.
F. Tahamtani, K. Mosaleheh, K. Seddighi
wiley   +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

Radii of harmonic mapping with fixed second coefficients in the plane [PDF]

, 2018
In this paper we investigate the radii problem for harmonic functions with a fixed coefficient and determine the radii of univalence, stable starlikness, stable convexity, fully starlikness and fully convexity of order α for these type of functions.
MOHAMMADIAN, Ali, AGHALARY, Rasoul
core   +1 more source

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

A q-Rogers–Ramanujan-based characterization of q-bi-bounded turning functions

Demonstratio Mathematica
This study investigates the second Hankel determinant for a specific class of functions associated with the q-Rogers–Ramanujan polynomial. To accomplish this, we introduce a new subclass of q-bounded turning functions related to the q-Rogers–Ramanujan ...
Khan Bilal, Shaba Timilehin Gideon, Araci Serkan, Adebesin Babatunde Olufemi, Usta Fuat   +4 more
doaj   +1 more source

Certain sufficient conditions for parabolic starlike and uniformly close-to-convex functions [PDF]

, 2016
In the present paper, we study certain differential subordinations and obtain sufficient conditions for parabolic starlikeness and uniformly close-toconvexity of analytic functions.
BILLING, Sukhwinder Singh, BRAR, Richa
core  

Results Related to the Sharp Coefficients Bounds for Symmetric Convex Functions Connected With the Sigmoid Function

Journal of Mathematics, Volume 2026, Issue 1, 2026.
A challenging task in studying geometric function theory is determining the sharp estimates for coefficient‐related results that come up in the Taylor series of analytic univalent functions. In the current paper, we attempt to establish some estimates of results concerning coefficient inequalities for the class of convex functions with respect to ...
Isra Al-Shbeil, Wael Mahmoud Mohammad Salameh, A. Alameer, Muhammad Abbas, Maha Alammari, Muhammad Arif, Alina Alb Lupaş, Smritijit Sen   +7 more
wiley   +1 more source