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There are ten chapters in this dissertation, which focuses on nine contents: growth estimates for a class of subharmonic functions in the half plane; growth estimates for a class of subharmonic functions in the half space; a generalization…

泛函分析 · 数学 2009-06-10 Guoshuang Pan

We announce conditions under which a given sequence of points on the complex plane is a subsequence of zeros of an entire function with weight restrictions on growth.

复变函数 · 数学 2015-05-22 Bulat Khabibullin , Galiya Talipova , Farkhat Khabibullin

In this paper we consider the existence and regularity of weakly polyharmonic almost complex structures on a compact almost Hermitian manifold $M^{2m}$. Such objects satisfy the elliptic system weakly $[J, \Delta^m J]=0$. We prove a very…

微分几何 · 数学 2019-09-24 Weiyong He , Ruiqi Jiang

We develop classical balayage (sweeping) measures and subharmonic functions on the ray system $S$ with a general origin on the complex plane $\mathbb C$. This allows for a subharmonic function $v$ on $\mathbb C$ to construct also a…

复变函数 · 数学 2018-12-06 B. N. Khabibullin , A. V. Khasanova

Let $M$\/ be a subharmonic function with Riesz measure $\mu_M$ on the unit disk $\mathbb D$ in the complex plane $\mathbb C$. Let $f$ be a nonzero holomorphic function on $\mathbb D$ such that $f$ vanishes on ${\sf Z}\subset \mathbb D$, and…

复变函数 · 数学 2018-11-27 Bulat N. Khabibullin , Farkhat B. Khabibullin

We study the asymptotics of zeros for entire functions of the form \sin z + \int_{-1}^1 f(t)e^{izt}dt with f belonging to a space X \hookrightarrow L_1(-1,1) possessing some minimal regularity properties.

复变函数 · 数学 2007-05-23 Rostyslav O. Hryniv , Yaroslav V. Mykytyuk

We consider the pointwise approximation of a subharmonic function by the logarithm of the modulus of an entire function up to a bounded quantity. In the case of finite order an estimate from below of the planar Lebesgue measure of an…

复变函数 · 数学 2010-01-08 Markiyan Hirnyk

In this article we introduce a class of discontinuous almost automorphic functions which appears naturally in the study of almost automorphic solutions of differential equations with piecewise constant argument. Their fundamental properties…

经典分析与常微分方程 · 数学 2013-06-06 A. Chavez , S. Castillo , M. Pinto

We prove some basic properties of quasinearly subharmonic functions and quasinearly subharmonic functions in the narrow sense.

复变函数 · 数学 2016-08-17 Mansour Kalantar

Let $\mathbb C$ be the complex plane, $E$ be a measurable subset in a segment $[0, R]$ of the positive semiaxis $\mathbb R^+$, $u\not\equiv -\infty$ be a subharmonic function on $\mathbb C$. The main result of this article is an upper…

复变函数 · 数学 2019-11-07 Liliia Gabdrakhmanova , Bulat Khabibullin

It is known that a subharmonic function of finite order $\rho$ can be approximated by the logarithm of the modulus of an entire function at the point $z$ outside an exceptional set up to $C\log|z|$. In this article we prove that if such an…

复变函数 · 数学 2007-10-03 Markiyan Hirnyk

We study the growth of harmonic functions on complete Riemann-ian manifolds where the extrinsic diameter of geodesic spheres is sublinear. It is an generalization of a result of A. Kazue. We also get a Cheng and Yau estimates for the…

微分几何 · 数学 2015-03-19 Gilles Carron

We construct and apply the classic balayage (sweeping out) of measures and subharmonic functions on closed system of rays in the complex plane with vertex at the origin, including measures and subharmonic functions and infinite order. The…

复变函数 · 数学 2016-10-13 Bulat Khabibullin , Al'bina Khasanova

We study meromorphic functions in a strip almost periodic with respect to the spherical metric. Then we get a complete description of zeros and poles for this class of functions, find a condition for a meromorphic almost periodic function…

复变函数 · 数学 2007-05-23 S. Favorov , N. Parfyonova

The paper studies semi-almost periodic holomorphic functions on a polydisk which have, in a sense, the weakest possible discontinuities on the boundary torus. The basic result used in the proofs is an extension of the classical Bohr…

复变函数 · 数学 2008-12-19 A. Brudnyi , D. Kinzebulatov

Answering a question of A.Zygmund in \cite{MR} G.MacLane and L.Rubel described boundedness of $L_2$-norm w.r.t. the argument of $\log |B|$, where $B$ is a Blaschke product. We generalize their results in several directions. We describe…

复变函数 · 数学 2015-09-22 Igor Chyzhykov

In this paper we introduce an equivalence relation on the classes of almost periodic functions of a real or complex variable which is used to refine Bochner's result that characterizes these spaces of functions. In fact, with respect to the…

复变函数 · 数学 2019-03-18 J. M. Sepulcre , T. Vidal

We study the growth rate of the inclusion length of an almost periodic function. For a given a. p. function such growth rate depends on the algebraic structure of Fourier exponents, i. e. on how good they can be approximated by rational…

动力系统 · 数学 2017-10-10 Mikhail Anikushin

This paper addresses the asymptotics of functionals with linear growth depending on the Riesz $s$-fractional gradient on piecewise constant functions. We consider a general class of varying energy densities and, as $s\to 1$, we characterize…

偏微分方程分析 · 数学 2025-10-07 Stefano Almi , Maicol Caponi , Manuel Friedrich , Francesco Solombrino

In this paper we shall consider the assymptotic growth of $|P_n(z)|^{1/k_n}$ where $P_n(z)$ is a sequence of entire functions of genus zero. Our results extend a result of J. Muller and A. Yavrian. We shall prove that if the sequence of…

复变函数 · 数学 2007-05-23 Dang Duc Trong , Truong Trung Tuyen