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相关论文: Asymptotic value of the multidimensional Bohr radi…

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In this article, by combining appropriate refined Bohr's inequalities with some techniques concerning bounded analytic functions defined in the unit disk, we generalize and improve several Bohr type inequalities for such functions.

复变函数 · 数学 2020-06-17 Gang Liu , Zhihong Liu , Saminathan Ponnusamy

Given a bounded n-connected domain in the plane bounded by non-intersecting Jordan curves, and given one point on each boundary curve, L. Bieberbach proved that there exists a proper holomorphic mapping of the domain onto the unit disc that…

复变函数 · 数学 2007-05-23 Steven R. Bell , Faisal Kaleem

We study bounded holomorphic functional calculus for nonsymmetric infinite dimensional Ornstein-Uhlenbeck operators ${\mathscr L}$. We prove that if $-{\mathscr L}$ generates an analytic semigroup on $L^{2}(\gamma_{\infty})$, then…

泛函分析 · 数学 2016-09-13 Andrea Carbonaro , Oliver Dragičević

Let $G$ be a nonempty bounded domain in a finite-dimensional Euclidean space. The main results are general estimates from below at points from $G$ for an arbitrary subharmonic function $u\not\equiv -\infty$ on the closure of the domain $G$…

复变函数 · 数学 2021-10-26 B. N. Khabibullin , E. U. Taipova

The existence and nonexistence of $\lambda$-harmonic functions in unbounded domains of $\mathbb{H}^n$ are investigated. We prove that if the $(n-1)/2$ Hausdorff measure of the asymptotic boundary of a domain $\Omega$ is zero, then there is…

偏微分方程分析 · 数学 2021-07-02 Leonardo Prange Bonorino , Patrícia Kruse Klaser

In this paper we continue the study of important Banach spaces of slice hyperholomorphic functions on the quaternionic unit ball by investigating the BMO- and VMO-spaces of slice hyperholomorphic functions. We discuss in particular…

复变函数 · 数学 2016-09-07 Jonathan Gantner , J. Oscar González-Cervantes , Tim Janssens

We introduce a suitable notion of asymptotic smoothness on infinite dimensional Banach spaces, and we prove that, under some structural restrictions on the space, the convex envelope of an asymptotically smooth function is asymptotically…

泛函分析 · 数学 2016-04-21 Jesús A. Jaramillo , Raquel Gonzalo , Diego Yáñez

In this paper, we establish several new versions of Bohr-type inequalities for bounded analytic functions in the unit disk by allowing $\varphi=\{\varphi_n(r)\}^{\infty}_{n=0}$ in place of the $\{r^n\}^{\infty}_{n=0}$ in the power series…

复变函数 · 数学 2023-02-16 Kaixin Chen , Ming-Sheng Liu , Saminathan Ponnusamy

The primary objective of this paper is to establish several sharp versions of Bohr inequalities for bounded analytic functions in the unit disk $\mathbb{D} := \{z\in\mathbb{C} : |z| < 1\}$ involving multiple Schwarz functions. Moreover, we…

复变函数 · 数学 2026-04-14 Vasudevarao Allu , Raju Biswas , Rajib Mandal

The Bohr inequality, first introduced by Harald Bohr in 1914, deals with finding the largest radius $r$, $0<r<1$, such that $\sum_{n=0}^\infty |a_n|r^n \leq 1$ holds whenever $|\sum_{n=0}^\infty a_nz^n|\leq 1$ in the unit disk $\mathbb{D}$…

复变函数 · 数学 2016-12-05 Yusuf Abu Muhanna , Rosihan M. Ali , Saminathan Ponnusamy

We first give an exposition on holomorphic isometries from the Poincar\'e disk to polydisks and from the Poincar\'e disk to the product of the Poincar\'e disk with a complex unit ball. As an application, we provide an example of proper…

复变函数 · 数学 2017-06-26 Shan Tai Chan , Ming Xiao , Yuan Yuan

The goal of this note is to prove that every real-valued Lipschitz function on a Banach space can be pointwise approximated on a given $\sigma$-compact set by smooth cylindrical functions whose asymptotic Lipschitz constants are controlled.…

泛函分析 · 数学 2024-09-04 Enrico Pasqualetto

We prove that for any countable finite dimensional CAT(0) cube complex, the Borel median graph on its Roller compactification has the Borel asymptotic dimension bounded from above by its dimension.

几何拓扑 · 数学 2025-05-16 Koichi Oyakawa

Let Y be an infinite covering space of a projective manifold M in P^N of dimension n geq 2. Let C be the intersection with M of at most n-1 generic hypersurfaces of degree d in P^N. The preimage X of C in Y is a connected submanifold. Let…

复变函数 · 数学 2007-05-23 Finnur Larusson

We study the $k$-fold symmetric starlike univalent logharmonic mappings of the form $f(z)=zh(z)\overline{g(z)}$ in the unit disk $\mathbb{D}:= \lbrace z \in \mathbb{C}: |z|<1 \rbrace$ with several examples, where $h(z)=\exp…

复变函数 · 数学 2023-08-15 Akash Meher , Priyabrat Gochhayat

In this article, we analyze refined and improved versions of the classical Bohr inequality for the function class $\mathcal{B}$, which consists of analytic self-mappings defined on the unit disk $\mathbb{D}$. We improve the Bohr-Rogosinski…

复变函数 · 数学 2025-12-19 Molla Basir Aahmed , Partha Pratim Roy

In this paper we study an algebraic and topological structure inside the following sets of special functions: Bloch functions defined on the open unit disk that are unbounded and analytic functions of bounded type defined a Banach algebra E…

泛函分析 · 数学 2020-11-16 M. Lilian Lourenço , Daniela M. Vieira

An upper bound of the variation of argument of a holomorphic function along a curve on a Riemann surface is given. This bound is expressed through the Bernstein index of the function multiplied by a geometric constant. The Bernstein index…

动力系统 · 数学 2007-05-23 Yulij Ilyashenko

We~identify the standard weighted Bergman kernels of spaces of nearly holomorphic functions, in~the sense of Shimura, on~bounded symmetric domains. This also yields a description of the analogous kernels for spaces of…

复变函数 · 数学 2023-03-07 Miroslav Engliš , El-Hassan Youssfi , Genkai Zhang

Let $\Omega$ be a regular Koenigs domain in the complex plane $\mathbb{C}$. We prove that the Hardy number of $\Omega$ is greater or equal to $1/2$. That is, every holomorphic function in the unit disc $f \colon \mathbb{D} \to \Omega$…