A SUFFICIENT CONDITION FOR AFFINE FRAMES WITH MATRIX DILATION

A sufficient condition for affine frame with an arbitrary matrix dilation is presented. It is based on the univariate case by Shi, and generalizes the univariate results of Shi, Casazza and Christensen from one dimension with an arbitrary real number a （a 〉 1） dilation to higher dimension with an arbitrary expansive matrix dilation.

Boundedness of Hyper-Singular Parametric Marcinkiewicz Integrals with Variable Kernels

In this article, we consider the boundedness of? on Hardy type space? .

Necessity of Oversampling Theorem for Affine Frames

In this paper we prove that n is relatively prime to a which is also necessary.

Parseval Frame Wavelet Multipliers in L^2(R^d)

Let A be a d x d real expansive matrix. An A-dilation Parseval frame wavelet is a function φ E n2 （Rd）, such that the set {｜det A｜n/2φ（Ant -l） ：n ∈ Z, l∈ Zd} forms a Parseval frame for L2 （Rd）. A measurable function f is called an A-dilation Parseval frame wavelet multiplier if the inverse Fourier transform of fφ is an A-dilation Parseval frame wavelet whenever φ is an A-dilation Parseval frame wavelet, where φ denotes the Fourier transform of φ. In this paper, the authors completely characterize all A-dilation Parseval frame wavelet multipliers for any integral expansive matrix A with ｜ det（A）｜= 2. As an application, the path-connectivity of the set of all A-dilation Parseval frame wavelets with a frame MRA in L2（Rd） is discussed.

调和分析与小波研究中的逼近论方法

本文介绍了函数逼近论对调和分析与小波研究的应用.本文从Korovkin定理开始,介绍了试验函数法对小波研究的应用、Jackson算子逼近对奇异积分算子有界性研究的应用、正则线性求和与逼近对边界探测研究以及Fourier逆变换计算的应用、以及稀疏数据反构函数的新结果.