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The Minkowski function is a crucial tool used in the study of balanced domains and, more generally, quasi-balanced domains in several complex variables. If a quasi-balanced domain is bounded and pseudoconvex then it is well-known that its…

复变函数 · 数学 2018-05-29 Pranav Haridas , Jaikrishnan Janardhanan

The primary aim of this article is to extend certain inequalities concerning the pre-Schwarzian derivatives from the case of analytic univalent functions to that of univalent harmonic mappings defined on certain domains. This is done in two…

复变函数 · 数学 2017-07-07 Gang Liu , Saminathan Ponnusamy

Let $(X,\mathcal H)$ be a $\mathcal P$-harmonic space and assume for simplicity that constants are harmonic. Given a numerical function $\varphi$ on $X$ which is locally lower bounded, let \begin{equation*} J_\varphi(x):=\sup\{\int^\ast…

偏微分方程分析 · 数学 2017-05-16 Wolfhard Hansen , Ivan Netuka

Pseudo-holomorphic curves on almost complex manifolds have been much more intensely studied than their "dual" objects, the plurisubharmonic functions. These functions are defined classically by requiring that the restriction to each…

复变函数 · 数学 2017-12-12 F. Reese Harvey , H. Blaine Lawson

Let u be a subharmonic function in D={|z|<1}. There exist an absolute constant C and an analytic function f in D such that \int_D |u(z)-log|f(z)|| dm(z)<C where m denotes the plane Lebesgue measure. We also consider uniform approximation.

复变函数 · 数学 2008-07-08 Igor Chyzhykov

In \cite{II}, authors introduced the concept of harmonically $(s,m)$-convex functions in second sense which unifies different type of convexities and is more general notion of Harmonic convexity. In this paper, authors obtain new estimates…

经典分析与常微分方程 · 数学 2016-02-17 Imran Abbas Baloch , İmdat İscan

In this note, we will present global equisingular approximations of quasi-plurisubharmonic functions with stable analytic pluripolar sets on compact complex manifolds.

复变函数 · 数学 2016-06-08 Qi'an Guan , Zhenqian Li

We show that on almost complex surfaces plurisubharmonic functions can be locally approximated by smooth plurisubharmonic functions. The main tool is the Poletsky type theorem due to U. Kuzman.

复变函数 · 数学 2014-03-10 Szymon Pliś

This study focuses on convex functions and their generalized. Thus, we start this study by giving the definition of convex functions and some of their properties and discussing a simple geometric property. Then we generalize E-convex…

经典分析与常微分方程 · 数学 2017-04-27 Adem Kilicman , Wedad Saleh

In this paper, an upper semismooth function is defined to be a lower semicontinuous function whose radial subderivative satisfies a mild directional upper semicontinuity property. Examples of upper semismooth functions are the proper lower…

最优化与控制 · 数学 2017-03-10 Marc Lassonde

We introduce and study a new class of generalized convex functions termed star quasiconvex functions. This class includes convex, star-convex, quasiconvex, quasar-convex, and positively homogeneous functions of any degree $p>0$ as special…

最优化与控制 · 数学 2026-05-27 Phan Quoc Khanh , Felipe Lara

We establish sharp inequalities involving the incomplete Beta and Gamma functions. These inequalities arise in the approximation of generalized Bernstein functions by higher order Thorin-Bernstein functions. Furthermore, new properties of a…

经典分析与常微分方程 · 数学 2024-09-05 Stamatis Koumandos , Henrik Laurberg Pedersen

In this paper we obtain several new complete characterizations of pseudolinear functions. Two of the results are of first-order and one is derivative free. All results are derived in terms of the Clarke-Rockafellar subdifferential.…

最优化与控制 · 数学 2025-11-25 Vsevolod I. Ivanov

In the present paper, we discuss several basic properties of a class of quasiconformal close-to-convex harmonic mappings with starlike analytic part, such results as coefficient inequalities, an integral representation, a growth theorem, an…

复变函数 · 数学 2021-10-25 Zhi-Gang Wang , Xin-Zhong Huang , Zhi-Hong Liu , Rahim Kargar

We define two-parameter families of noncommutative symmetric functions and quasi-symmetric functions, which appear to be the proper analogues of the Macdonald symmetric functions in these settings.

组合数学 · 数学 2007-05-23 F. Hivert , A. Lascoux , J. -Y. Thibon

First we extend the theory of subharmonic functions on smooth strictly $k$-analytic curves from Thuillier's thesis to the case of possibly singular analytic curves over a non-archimedean field. Classically psh functions are then defined as…

代数几何 · 数学 2025-09-18 Walter Gubler , Joseph Rabinoff

We introduce and study two new relations between function spaces over measure spaces of infinite measure, motivated by the question of establishing compactness. The first relation captures the uniform decay of function (quasi-)norms ``at…

泛函分析 · 数学 2025-11-25 Zdeněk Mihula , Maximilián Pándy

Generalizing the well-known mean-value property of harmonic functions, we prove that a p-harmonic function of two variables satisfies, in a viscosity sense, two asymptotic formulas involving its local statistics. Moreover, we show that…

偏微分方程分析 · 数学 2011-08-10 David Hartenstine , Matthew Rudd

We introduce and study the notion of plurisubharmonic functions in calibrated geometry. These functions generalize the classical plurisubharmonic functions from complex geometry and enjoy their important properties. Moreover, they exist in…

微分几何 · 数学 2017-12-12 F. Reese Harvey , H. Blaine Lawson

We establishe an affine Hardy-Littlewood-Sobolev inequality concerning two different functions which is stronger than the classical Hardy-Littlewood-Sobolev inequality. Furthermore, we also prove reverse inequalities for the new…

泛函分析 · 数学 2025-08-05 Youjiang Lin , Jinghong Zhou , Jiaming Lan