Hausdorff算子在Campanato空间的有界性

研究了几种不同类型的Hausdorff算子在Campanato空间的有界性,并且得到了这些算子在Campanato空间上有界的最佳常数.此外,还讨论了多线性Hausdorff算子在Morrey空间中的有界性.     

一类卷积型Calderón-Zygmund 算子在端点Triebel-Lizorkin 空间上的有界性

本文主要研究了卷积型Calderón-Zygmund算子在一些端点空间上的有界性.在较弱的正则性条件下,利用原子-分子分解和基于n维Daubechies小波基的算子分析,建立了算子在端点Triebel-Lizorkin空间F0,q1上的有界性.     

次线性算子在Herz型Hardy空间上的有界性

本文得到了一类次线性算子在Herz型Hardy空间上的有界性判定条件,该算子包括调和分析中许多重要的算子,同时还证明了Bochner-Riesz算子在Herz型Hardy空间上的有界性.     

单边算子的多线性交换子在Triebel-Lizorkin空间上的加权有界性

该文在单边意义下采用权的外推法研究了Calderón-Zygmund奇异积分算子,离散面积函数,Weyl分数次积分与Lipschitz函数生成的多线性交换子从加权Lebesgue空间到加权Triebel-Lizorkin空间上的有界性.     

θ型Calderón-Zygmund奇异积分算子交换子在Triebel-Lizorkin空间上的有界性

本文主要讨论了满足一定条件的θ型C alderón-Zygm und奇异积分算子交换子在T riebel-L izork in空间上的有界性问题.     

Littlewood-Paley算子交换子在加权Herz型Hardy空间上的有界性

研究了Littlewood-Paley算子交换子gψ,b在加权Herz型Hardy空间上的性质,并证明了gψ,b在某些条件下是HKa,pq(ω1,ω2)到Ka,pq(ω1,ω2)和HKa,pq(ω1,ω2)到WKa,pq(ω1,ω2)上的有界算子.     

θ型Calderón-Zygmund奇异积分算子交换了在Triebel-Lizorkin空间上的有界性

本文主要讨论了满足一定条件的θ型Calderón-Zygmund奇异积分算子交换子在Triebel-Lizorkin空间上的有界性问题.     

抛物型奇异积分算子在Triebel-Lizorkin空间的有界性

在Triebel-Lizorkin空间上建立了粗糙核抛物型奇异积分算子T的有界性,其中算子T定义为Tf(x)=p.v.∫_(Rn)(Ω(y))/(ρ(y)~β)f(x-y)dy,β≥n,ρ是伴随某种非迷向展缩的范数.     

CRW型交换子在Triebel-Lizorkin空间的有界性

本文考虑交换子[b,T]在 Triebel-Lizorkin 空间上的有界性,其中 b∈BMO(R~n),T 是卷积型奇异积分算子,其核为Ω∈L log~ L(S~(n-1)),给出了该交换子在 F_p~(s,p)(R~n)(s＞0,1＜p,q＜∞) 上有界的一个等价条件．     

CRW型交换子在Triebel-Lizorkin空间的有界性

本文考虑交换子[b,T]在Triebel-Lizorkin空间上的有界性,其中b∈BMO(Rn),T是卷积型奇异积分算子,其核为Ω∈Llog+L(Sn-1),给出了该交换子在Fs,qp(Rn)(s＞0,1＜p,q＜∞)上有界的一个等价条件.     

Boundedness of Hausdorff operators on Lebesgue spaces and Hardy spaces

In this paper, we study the boundedness of the Hausdorff operator H_? on the real line R. First, we start with an easy case by establishing the boundedness of the Hausdorff operator on the Lebesgue space L~p(R)and the Hardy space H~1(R). The key idea is to reformulate H_? as a Calder′on-Zygmund convolution operator,from which its boundedness is proved by verifying the Hrmander condition of the convolution kernel. Secondly,to prove the boundedness on the Hardy space H~p(R) with 0 p 1, we rewrite the Hausdorff operator as a singular integral operator with the non-convolution kernel. This novel reformulation, in combination with the Taibleson-Weiss molecular characterization of H~p(R) spaces, enables us to obtain the desired results. Those results significantly extend the known boundedness of the Hausdorff operator on H~1(R).     

Boundedness of Hausdorff operators on the power weighted Hardy spaces

In this paper, we consider the two-dimensional Hausdorff operators on the power weighted Hardy space H_(|x|α)~1(R~2) ( -1 ≤α≤0), defined by H_(Φ,A)f(x)=∫R~2Φ(u)f(A(u)x)du,where Φ∈L_loc~1(R~2),A(u) = (α_(ij)(u))_(i,j=1)~2 is a 2×2 matrix, and each α_(i,j) is a measurablefunction.We obtain that HΦ,A is bounded from H_(|x|~α)~1(R~2) ( -1≤α≤0) to itself, if∫R2|Φ(u)‖det A~(-1)(u)|‖A(u)‖~(-α)ln(1+‖A~(-1)(u)‖~2/|det A~(-1)(u)|)du∞.This result improves some known theorems, and in some sense it is sharp.     

Boundedness of Hausdorff operators on some product Hardy type spaces

We study Hausdorff operators on the product Besov space B01,1 (Rn × Rm) and on the local product Hardy space h1 (Rn × Rm).We establish some boundedness criteria for Hausdorff operators on these functio...     

Hausdorff operators on Euclidean spaces

Hausdorff operator is an important operator raised from the dilation on Euclidean space and rooted in the classical summability of number series and Fourier series. It is also connected to many well known operators in real and complex analysis. This article is a survey of some recent developments and extensions on the Hausdorff operator. Particularly, various boundedness properties of the Hausdorff operators, studied recently by our research group, are addressed.     

Defining Hausdorff operators on Euclidean spaces

After 2000, an interest in the Hausdorff operators grew, first of all in the sense of a diversity of spaces on which these operators were considered. We try to introduce a ‘correct’ definition of the Hausdorff operator on Euclidean spaces. This is supplemented by a variety of known and possible applications.     

Boundedness of pseudodifferential operators on modulation spaces

We study classes of pseudodifferential operators which are bounded on large collections of modulation spaces. The conditions on the operators are stated in terms of the L^p,q estimates for the continuous Gabor transforms of their symbols. In particular, we show how these classes are related to the class of operators of Gröchenig and Heil, which is bounded on all modulation spaces.     

次线性算子在Herz-Morrey空间上的有界性

引进了一类被称为Herz-Morrey空间的函数空间,并给出了关于次线性算子在较弱的局部尺寸条件下在这类空间上有界性的一些一般性的结果．     

Boundedness of multilinear operators on generalized Morrey spaces

In this paper, the authors prove the boundedness of the multilinear maximal functions, multilinear singular integrals and multilinear Riesz potential on the product generalized Morrey spaces Mp1,ω1(Rn) ×···× Mpm,ω1(Rn) respectivelyThe main theorems of this paper extend some known results.     

Boundedness of vector-valued operators on weighted Herz spaces

In this paper, the authors establish the weighted weak and strong type norm inequalities in the set of weighted Herz-type spaces for a vector-valued analogue of the Hardy-Littlewood maximal operator; and using this, the authors obtain the weightd inequalies for a wide class of sublinear singular operators defined onR ⁿ which include the Calderón-Zygmund operators as special cases. The fractional versions of these results are also given.