Characterization of Function Spaces Using Wavelets

It is well known that we can use wavelets to characterize various function spaces, for example, Lebesgue, Sobolev, and Besov spaces, and get equivalent norms with wavelet coefficients. However, we cannot determine whether a function is in these spaces by looking only at the wavelet coefficients since the constant function is orthogonal to all wavelets. In this paper, we close the gap by investigating the convergence of wavelet series.     

双线性Fourier乘子算子与Morrey空间

In this paper, by establishing a result concerning the mapping properties for bi(sub)linear operators on Morrey spaces, and the weighted estimates with general weights for the bilinear Fourier multiplier, the author establishes some results concerning the behavior on the product of Morrey spaces for bilinear Fourier multiplier operator with associated multiplierσ satisfying certain Sobolev regularity.     

Daubechies Wavelets on Intervals with Application to BVPS

In this paper, Daubechies wavelets on intervals are investigated. An analytic technique for evaluating various types of integrals containing the scaling functions is proposed; they are compared with classical techniques. Finally, these results are applied to two-point boundary value problems.     

小波与函数空间

Triebe利用Littlewood Paley分解将大多数函数空间分类成两类三指标的函数空间：Besov空间和Triebel Lizorkin空间；但Littlewood Paley 分解很难直接分析Sobolev空间L^p的插值空间Lorentz空间，也很难分析Triebel Lizorkin空间F^{α,q}_1的预备对偶空间和对偶空间.运用小波，作者给出这些空间一个统一刻画：Triebel Lizorkin Lorentz 空间，Besov Lorentz空间和F^{α,q}_1的预备对偶空间和对偶空间；另外也研究这些空间的三个性质.     

双线性Fourier乘子在Triebel-Lizorkin和Besov空间的有界性

本文利用Littlewood-Paley分解,Fourier变换和逆变换等方法,研究了双线性Fourier乘子在非齐次正光滑性Triebel-Lizorkin空间和Besov空间的有界性.     

Besov空间上的H?rmander乘子定理

本文在紧Ｌｉｅ群上建立了一个Ｂｅｓｏｖ空间上的Ｈ?ｒｍａｎｄｅｒ乘子定理．     

Regularity of the Solution to the Dirichlet Problem in Morrey Spaces

The aim of this paper is to study Morrey regularity of the solution to the Dirichlet problem for second order elliptic equation of the form Lu = -(a_{ij}u_x_i + b_j_u)_x_j + du = e + (f_j)x_j in a bounded open subset of Rn(n ≥ 3), where b_j , d, e, f_j are assumed to be in some Morrey spaces.     

Wavelets and Geometric Structure for Function Spaces

Abstract With Littlewood–Paley analysis, Peetre and Triebel classified, systematically, almost all the usual function spaces into two classes of spaces: Besov spaces and Triebel–Lizorkin spaces ; but the structure of dual spaces of is very different from that of Besov spaces or that of Triebel–Lizorkin spaces, and their structure cannot be analysed easily in the Littlewood–Paley analysis. Our main goal is to characterize in tent spaces with wavelets. By the way, some applications are given: (i) Triebel–Lizorkin spaces for p = ∞ defined by Littlewood–Paley analysis cannot serve as the dual spaces of Triebel–Lizorkin spaces for p = 1; (ii) Some inclusion relations among these above spaces and some relations among and L ¹ are studied. Supported by NNSF of China (Grant No. 10001027)     

Dunkl Multiplier Operators on a Class of Reproducing Kernel Hilbert Spaces

We study some class of Dunkl multiplier operators; and we establish for them the Heisenberg-Pauli-Weyl uncertainty principle and the Donoho-Stark''s uncertainty principle. For these operators we give also an application of the theory of reproducing kernels to the Tikhonov regularization on the Sobolev-Dunkl spaces.     

Asymptotics of the Roots of Bernstein Polynomials Used in the Construction of Modified Daubechies Wavelets

This paper is devoted to the study of the asymptotics of roots of a sequence of Bernstein polynomials approximating a piecewise linear function. This sequence arises in the construction of modified compactly supported wavelets that, in contrast to classical Daubechies wavelets, preserve localization with the growth of smoothness. It is proved that the limiting curve for roots is the boundary of the domain of convergence of the Bernstein polynomials on the complex plane.     

极大多线性Bochner-Riesz算子的Morrey空间估计

本文用分数次极大算子控制的方法,得到了极大多线性Bochner-Riesz算子在Morrey空间的有界性,并且证明了它也是从Mp1,1+p1(λ-β/n)空间到BMOλ,p2空间上的有界算子,其中1/p1-β/n=1/p2,-1/p2≤λ＜1/n.     

A regularity criterion for the density‐dependent magnetohydrodynamic equations

In this paper, regularity criterion for the 3‐D density‐dependent magnetohydrodynamic equation is considered. It is proved that the solution keeps smoothness only under an integrable condition on the velocity field in multiplier spaces. Hence, it turns out that the velocity field plays a dominant role in the regularity criteria of the weak solutions to this nonlinear coupling problem even with density. Copyright © 2009 John Wiley & Sons, Ltd.     

加权Orlicz空间上的Littlewood Paley算子

该文证明了一个与Littlewood Paley 算子有关的不等式，并由此导出Littlewood Paley 算子在加权Orlicz 空间和Morrey空间的有界特征。     

Wavelets in Banach Spaces

We describe a construction of wavelets (coherent states) in Banach spaces generated by admissible group representations. Our main targets are applications in pure mathematics while connections with quantum mechanics are mentioned. As an example, we consider operator-valued Segal–Bargmann-type spaces and the Weyl functional calculus.     

齐型空间上的Morrey空间的算子有界性及其应用

作者建立了一大类次线性算子和交换子在齐型空间上的Morrey空间中的有界性．应用这些结果,作者研究了具有不连续系数的超抛物方程解的局部正则性．     

变指标 Morrey 空间上的 Marcinkiewicz 积分及交换子的有界性

利用Maxcinkiewicz积分算子μ,Lusin面积积分μs和Littlewood-Paley g_λ~*函数以及相应的交换子在变指标Lebesgue空间上的有界性,得到了它们在变指标Morrey空间上的有界性结果.     

一些算子的交换子在广义Morrey空间上的紧性

本文主要研究分数次积分算子、Marcinkiewicz积分、带光滑核的pseudo-differential算子的交换子在广义Morrey空间M_p,ω（Rⁿ）上的紧性.注意它们的处理方法分别不同.     

类奇异积分和交换子在广义Morrey空间上的有界性

The generalized Morrey spaces are introduced under the hypothesis that Rn is endowed with the general parabolic metric , and the boundedness properties are established in generalized Morrey spaces for a class of singular integral operators, which include Calderon-Zygmund singular integrals and their commutators with BMO.     

几类具有粗糙核的算子在加权Morrey空间上的有界性

设Ω∈L~q(S~(n-1))且1相似文献   

乘积型Morrey空间中乘积Hardy型算子的最佳界

本文得到了乘积Hardy型算子flm在乘积Morrey空间Lq,λ(Rn×…×Rn)和齐次中心Morrey空间Bq,λ(Rn×...× Rn)上的算子范数.基于旋转方法,我们推广了傅尊伟等人的结果(见[Houston J.Math.,2012,38(1):225-244]).