Results 71 to 80 of about 1,238 (216)

Starlikeness associated with parabolic regions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
A parabolic starlike function f of order ρ in the unit disk is characterized by the fact that the quantity zf′(z)/f(z) lies in a given parabolic region in the right half-plane. Denote the class of such functions by PS∗(ρ).
Rosihan M. Ali
doaj   +1 more source

Second Hankel Determinants for Some Subclasses of Biunivalent Functions Associated with Pseudo-Starlike Functions

open access: yes, 2017
We introduce second Hankel determinant of biunivalent analytic functions associated with λ-pseudo-starlike function in the open unit disc Δ subordinate to a starlike univalent function whose range is symmetric with respect to the real axis.
K. Rajya Laxmi, R. Bharavi Sharma
core   +1 more source

Fekete–Szegö Variations for Some New Classes of Analytic Functions Explained Over Poisson and Borel Distribution Series

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 8, Page 9241-9252, 30 May 2025.
ABSTRACT The motivation of this paper is to explore and generalize Sakaguchi‐type functions, which play a significant role in geometric function theory. In this context, we introduce four new classes of analytic univalent functions: ℑΨ,tb,α,ρ,ℑϑb,α,ρ,ℑΘ,mb,α,ρ$$ {\Im}_{\Psi, t}^{b,\alpha, \rho },\kern0.3em {\Im}_{\vartheta}^{b,\alpha, \rho },\kern0.3em
Arzu Akgül
wiley   +1 more source

Characterization of p-valent q-starlike functions through Hadamard product and Poisson distribution

open access: yesApplied Mathematics in Science and Engineering
This paper presents significant advancement in the study of multivalent functions by introducing three new subclasses of p-valent q-starlike functions, defined with respect to higher-order q-derivatives within the open unit disk of the complex plane ...
Muhammad Uzair Shah   +3 more
doaj   +1 more source

INNER RADIUS OF UNIVALENCE FOR A STRONGLY STARLIKE DOMAIN (New Extension of Historical Theorems for Univalent Function Theory) [PDF]

open access: yes, 2000
. The inner radius of univalence of a domain $D $ with Poincar\’e density $\rho_{D} $ is the possible smallest number $\sigma $ such that the condition $||S_{f}||D=\mathrm{s}\mathrm{u}\mathrm{p}w\in D\rho_{D(}w)^{-}2|S_{f}(z)|\leq\sigma$ implies the ...
Toshiyuki Sugawa, Sugawa, Toshiyuki
core  

An asymptotic formula for an integral in starlike function theory

open access: yes, 1976
The paper is concerned with the integral \[ H = ∫ 0 2 π | f | σ
R. R. London, D. K. Thomas
core   +1 more source

On the Eccentric Spectra of the Line Graph of Starlike Trees

open access: yesDiscrete Dynamics in Nature and Society, Volume 2025, Issue 1, 2025.
A tree is called starlike if it has exactly one vertex with a degree greater than two. In this paper, we determine the eccentricity spectrum of the line graphs of starlike trees and compute their eccentric energy. Furthermore, we establish that the eccentricity matrix of the line graph of any starlike tree is irreducible.
S. Balamoorthy   +4 more
wiley   +1 more source

Certain Constraints for Functions Provided by Touchard Polynomials

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2025, Issue 1, 2025.
Since finding solutions to integral equations is usually challenging analytically, approximate methods are often required, one of which is based on Touchard polynomials. This paper examines the necessary constraints for the functions Ϝετς,Πε,τ,ςℏ, and the integral operator Lετς, defined by Touchard polynomials, to be in the comprehensive subclass ∁η(q3,
Tariq Al-Hawary   +3 more
wiley   +1 more source

Inclusion Theorems of Certain Integral Transform Related to Normalized Hypergeometric Functions and Generalized Bessel Functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2025, Issue 1, 2025.
This study explores the geometric properties of normalized Gaussian hypergeometric functions in a certain subclass of analytic functions. This work investigates the inclusion properties of integral operators associated with generalized Bessel functions of the first kind.
Manas Kumar Giri   +2 more
wiley   +1 more source

Some Geometric Characterizations of a Certain Class of Log-Harmonic Mappings

open access: yesMathematics
This article investigates structural properties of a class of log-harmonic mappings associated with starlike analytic functions in the unit disk. Beginning with a general representation of the log-harmonic mappings, we use sharp inequalities using ...
Madhusmita Mohanty   +2 more
doaj   +1 more source

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