紧致齐性空间上的调和分析（Ⅳ）─—Riesz变换与Bessel变换

本文研究了紧致齐性空间上的Ｒｉｅｓｚ位势算子与Ｂｅｓｓｅｌ位势算子，Ｒｉｅｓｚ变换与Ｂｅｓｓｅｌ变换，给出了上述算子对应的核函数的具体构造并证明了Ｒｉｅｓｚ变换与Ｂｅｓｓｅｌ变换作为奇异积分算子的Ｈ￣ｐ有界性，ｐ＞０。     

紧致齐性空间上的调和分析（IV）：Riesz变换与Bessel变换

本文研究了紧致齐性空间上的Ｒｉｅｓｚ位势算子与Ｂｅｓｓｅｌ位势算子，Ｒｉｅｓｚ变换与Ｂｅｓｓｅｌ变换，给出了上述算子对应的核函数的具体构造并证明了Ｒｉｅｓｚ变换与Ｂｅｓｓｅｌ变换作为奇异积分算子的Ｈ＾ｐ有界性，Ｐ＞０。     

论p-Bergman,α-Bloch,小α-Bloch空间与Cesro平均

对于ｐ，α∈（０，∞）设Ａｐ，Ｂα和Ｂ０α分别是开单位圆盘上的ｐ－Ｂｅｒｇｍａｎ，α－Ｂｌｏｃｈ和小α－Ｂｌｏｃｈ空间本文首先给出Ａｐ，Ｂα和Ｂα０之间的进一步关系；其次，研究Ａｐ，Ｂα和Ｂα０中的Ｔａｙｌｏｒ级数之部分和的Ｃｅｓｒｏ平均；最后，讨论Ａｐ，Ｂα和Ｂα０中Ｔａｙｌｏｒ级数之系数的Ｃｅｓｒｏ平均     

用Fourier─Bessel级数求解DiNi级数方程

在航天器中，运用圆环型防晃挡板抑制推进剂的晃动。推进剂在带有圆环防晃挡板的圆柱容器中的动力特性。可由液体的势函数确定，而势函数中的系数的确定可以转化为ＤｉＮｉ级数系数的确定。以往只研究液体在容器中作微小晃动，从而只取级数的第一项来近似。本文介绍了一种求ＤｉＮｉ级数组系数的方法，它的基本思想是在防晃挡板上面设计一分段函数，用Ｆｏｕｒｉｅｒ—Ｂｅｓｓｅｌ级数将其展开，再利用圆柱函数的特性，将ＤｉＮｉ级数组的求解问题转化为一组线性方程     

关于Bloch空间的子空间

本文给出了Ｂｌｏｃｈ空间一类子空间的包含关系,并利用Ｈａｄａｍａｒｄ缺项级数证明了这些关系是最好的．所获得的结果包含了Ｂｅｓｏｖ空间和Ｂｌｏｃｈ空间的一些已知结论．     

一类整函数的Pade逼近

该文首先研究了级小于或等于１，且仅具有实零点的整函数的Ｐａｄｅ逼近，其次讨论了Ｂｅｓｓｅｌ函数的ｐａｄｅ逼近。     

Banach函数空间上的Bessel(Riesz)位势及其应用(I)理论

本文首先引入Ｂｅｓｅｌ（Ｒｉｅｓｚ）位势Ｋ¨ｏｔｈｅ函数空间Ｘｓ（Ｘｓ）的概念，然后讨论一类算子在Ｌｅｂｅｓｇｕｅ－位势Ｋ¨ｏｔｈｅ函数空间Ｌｑ（－Ｔ，Ｔ；Ｘｓ）上的对偶估计．由此我们得到半群ｅｘｐ（ｉｔ（－Δ）ｍ／２）和算子Ａ：＝∫ｔ０ｅｘｐ（ｉ（ｔ－τ）（－Δ）ｍ／２）·ｄτ在Ｌｅｂｅｓｇｕｅ－Ｂｅｓｏｖ空间Ｌｑ－Ｔ，Ｔ；·Ｂｓｐ，２中的一些时间－－空间Ｌｐ－Ｌｐ′估计．本文的系列文将给出这些估计的应用     

On Subspaces of Bloch Space and Series with Hadamard Gaps

本文研究了由修改的Ｂｅｓｏｖ模和Ｃａｒｌｅｓｏｎ测度所定义的Ｂｌｏｃｈ空间的一类子空间．利用这类子空间与Ｈａｄａｍａｒｄ缺项级数之间的关系，证明了他们之间的包含关系．作为所得结果的一个简单推论，本文对Ｋ．Ｓｔｒｏｅｔｈｏｆ关于ＢＭＯＡ和ＶＭＯＡ的一个未解决的问题作出了否定的回答．     

酉群上Fourier级数的临界指标以下的Cesàro求和

本文解决了酉群上Ｆｏｕｒｉｅｒ级数的Ｃｅｓａｒｏ求和的收敛问题。首先给出了时Ｃｅｓａｒｏ核的Ｌｅｂｅｓｇｕｅ常数的精确估计，然后得出酉群上Ｆｏｕｒｉｅｒ级数Ｃｅｓａｒｏ求和收敛的一般性结果．     

精细Besov空间

本文将Ｂｅｓｏｖ空间Ｂ＿Ｐ～Ｓ，ｑ推广为精细Ｂｅｓｏｖ空间ＲＢ＿Ｐ～ａ，ｑ，其中ｓ∈Ｒ，而ａ∈Ｒ～（ｋ＋１），ｋ为非负整数．给出了精细Ｂｅｓｏｖ空间的等价拟范数和嵌入定理．同时证明了在Ｂ＿Ｐ～Ｓ，ｑ和 ＵＢ＿ｐ～ｔ，ｑ之间还存在无穷多个精细Ｂｅｓｏｖ空间作为真子空间．     

H1（D）空间的Bessel级数

本文给出关于H1（D）空间中函数的Bessel级数的部分和用幂级的部分和表示的一个恒等式，基于它，可以得到Bessel 级数部分和偏差的诸多精确估计。     

Series expansions for computing Bessel functions of variable order on bounded intervals

Based on a continuity property of the Hadamard product of power series we derive results concerning the rate of convergence of the partial sums of certain polynomial series expansions for Bessel functions. Since these partial sums are easily computable by recursion and since cancellation problems are considerably reduced compared to the corresponding Taylor sections, the expansions may be attractive for numerical purposes. A similar method yields results on series expansions for confluent hypergeometric functions. This revised version was published online in June 2006 with corrections to the Cover Date.     

On sharp estimates of the convergence of double Fourier–Bessel series

The problem of approximation of a differentiable function of two variables by partial sums of a double Fourier–Bessel series is considered. Sharp estimates of the rate of convergence of the double Fourier–Bessel series on the class of differentiable functions of two variables characterized by a generalized modulus of continuity are obtained. The proofs of four theorems on this issue, which can be directly applied to solving particular problems of mathematical physics, approximation theory, etc., are presented.     

On a Series Representation for Integral Kernels of Transmutation Operators for Perturbed Bessel Equations

A representation for the kernel of the transmutation operator relating a perturbed Bessel equation to the unperturbed one is obtained in the form of a functional series with coefficients calculated by a recurrent integration procedure. New properties of the transmutation kernel are established. A new representation of a regular solution of a perturbed Bessel equation is given, which admits a uniform error bound with respect to the spectral parameter for partial sums of the series. A numerical illustration of the application of the obtained result to solve Dirichlet spectral problems is presented.     

Limit Curves for Zeros of Sections of Exponential Integrals

We are interested in studying the asymptotic behavior of the zeros of partial sums of power series for a family of entire functions defined by exponential integrals. The zeros grow on the order of \(O(n)\) , and after rescaling, we explicitly calculate their limit curve. We find that the rate at which the zeros approach the curve depends on the order of the singularities/zeros of the integrand in the exponential integrals. As an application of our findings, we derive results concerning the zeros of partial sums of power series for Bessel functions of the first kind.     

On the summation of Schlömilch's series

ABSTRACT

Schlömilch's series is named after the German mathematician Oscar Xavier Schlömilch, who derived it in 1857 as a Fourier series type expansion in terms of the Bessel function of the first kind. However, except for Bessel functions, here we consider an expansion in terms of Struve functions or Bessel and Struve integrals as well. The method for obtaining a sum of Schlömilch's series in terms of the Bessel or Struve functions is based on the summation of trigonometric series, which can be represented in terms of the Riemann zeta and related functions of reciprocal powers and in certain cases can be brought in the closed form, meaning that the infinite series are represented by finite sums. By using Krylov's method we obtain the convergence acceleration of the trigonometric series.     

ON SATURATION CLASS FOR JACKSON SUMS OF BESSEL SERIES

Let function f(z) be analytic in |z|<1 and continuous on |z|≤1. The saturation class for the Jackson sums of the Bessel series of f(z) is discussed.     

On saturation class for Jackson sums of Bessel series

Let function f (z) be analytic in |z|＜1 and continuous on |z|≤1. The saturation class for the Jackson sums of the Bessel series of f(z) is discussed.     

On uniform approximation by partial sums of Jacobi series on elliptic region

In this paper, we discuss the relation between the partial sums of Jacobi series on an elliptic region and the corresponding partial sums of Fourier series. From this we derive a precise approximation formula by the partial sums of Jacobi series on an elliptic region.     

Almost Everywhere Strong Summability of Fejér Means of Rectangular Partial Sums of Two-dimensional Walsh-Fourier Series

In this paper we prove a BMO-estimate for rectangular partial sums of two-dimensional Walsh-Fourier series, and using this result we establish almost everywhere exponential summability of rectangular partial sums of double Walsh-Fourier series.