Skip to content

Similar papers

Open access Oct 2026

Upper Bounds and Fekete–Szegö Problem for Bi-Univalent Functions Involving Bazilevič and λ-Pseudo Functions Related to Lucas-Balancing Polynomials

This work introduces two novel classes of bi-univalent functions, denoted by ℬΣ(μ,γ,λ;r) and ΡΣ(μ,γ,λ;r), linked to Lucas-Balancing polynomials within the open unit disk. For functions pertaining to these newly defined classes, we establish estimates for the early Taylor–Maclaurin coefficients |a2| and |a3|. Furthermor...

Shaymaa Y. Alkufi, A. Wanas, A. Lupaș · 0 citations
Preprint Oct 2026

The Schwarzian derivative in several complex variables univalence and geometry

In one complex variable the Schwarzian derivative characterizes the M\"obius transformations, arises from a second-order linear equation, and controls univalence through the theorems of Nehari and of Ahlfors--Weill. This chapter presents what is known about these three properties for locally biholomorphic mappings in $...

R. Hernández · 0 citations
Open access Nov 2026

Generalized Analytic Function Classes Using an Extended Two-Factor q-Differential Operator: Fekete–Szegő Problem

In this paper, we introduce an extended two-factor q-differential multiplier operator denoted by ℳq,,n,mf(z). Using this operator, we define the associated subclasses Xq,,n,m() and Yq,,n,m(,) of analytic functions. We obtain upper bounds for the initial coefficients a2, a3 and FeketeSzeg inequalities for the functional...

V. Wanjala, B. Adhiambo · 0 citations
Preprint Aug 2026

Higher-order derivatives of radially symmetric functions

We prove a surprisingly simple pointwise formula for the Frobenius norm of the tensor of $n$-th order partial derivatives of a radially symmetric function $f(x)=g(r(x))$. Using the iterations of the differential operator $\mathcal{D} g(r)=g'(r)/r$, we avoid technical difficulties usually caused by higher-order radial d...

Zdeněk Mihula, Jan Vyb'iral · 0 citations
Open access Aug 2026

Boundedness Results for the Fractional Wolff Potential in Morrey Spaces over Homogeneous Groups

Let G be a homogeneous Lie group of dimension ϰ. In this article, we investigate the mapping properties of the Wolff-type potential Wϑ,2 on G, associated with a homogeneous quasi-norm, and show that it coincides, up to an explicit dimensional constant, with the Riesz potential of doubled order 2ϑ on G. Using this ident...

Waqar Afzal, Mujahid Abbas, M. El-Naggar et al. · 3 citations
Open access Sep 2026

A Hermite–Hadamard Inequality for Superquadratic Functions on Euclidean Balls

Let d≥1, let Kd=[0,∞)d, and let B(A,R)⊂Kd be a closed Euclidean ball. For a continuous superquadratic function φ:Kd→R, we establish a corrected Hermite–Hadamard estimate that relates the integral mean of φ over the ball to its value at the center and its integral mean over the boundary sphere. The correction is given e...

M. Alomari, M. K. Bakula · 0 citations

We use cookies to run the site and, with your consent, for analytics and to show ads. See our Cookie Policy.