加权Hardy空间与加权L^p空间之间的算子内插

利用Calderon-Zygmund分解,给出了当w∈A1时加权Hardy空间与加权L^p空间之间的算子内插。     

局部紧Vicenkin群上Herz型Hardy空间中的线性算子的内插定理

本得到了Vilenkin群上Herz型Hardy空间中的线性算子内插定理及其推广。     

关于G-M成果研究的若干新动态Ⅱ--与G-M型空间相关的算子

结合自己的工作，对Gowers-Maurey系列成果获Fields奖以来的研究的新动态作一综述，该是下篇，主要讨论与G-M型空间相关的算子，包括可通过G-M型空间分解的算子，G-M型空间上的算子理想与算子构成，G-M型空间上的算子谱理论等。     

局部紧Vicenkin群上Herz型Hardy空间中的线性算子内插定理

本文得到了 Vilenkin群上 Herz型 Hardy空间中的线性算子内插定理及其推广     

一类抽象动力算子的谱分析

文章利用Hilbert空间理论,对一类抽象动力算子的谱进行研究,得到动力算子对复平面的划分。     

一些半群在加权Morrey空间上的振荡与变差不等式

研究了一些半群在加权Morrey空间上的振荡与变差不等式.通过向量值理论,建立了相关于Laplacian算子及Hermite算子的热半群与Poisson半群的振荡算子和变差算子在加权Morrey空间上的有界性.     

二元非混合单调算子方程组的迭代求解

利用锥与半序理论和混合单调算子理论,讨论Banach空间中非单调二元非线性算子方程组解的存在性与唯一性,并给出了收敛于方程组解的迭代序列和误差估计。改进和推广了混合单调算子方程和一元算子方程的某些相应结果。     

再生核空间中样条插值算子与最佳插值逼近算子的一致性

对于微分算子样条,为了保证一致收敛性,通常要求较高的光滑性条件。对多项式样条来说,至少要求二阶导数连续才能保证一致收敛性。本文在再生核空间H_0~1中把微分算子样条与再生核联系起来了,证明了这种微分算子样条与H_0~1中的最佳插值逼近算子的一致性,并利用最佳插值理论可直接得出H_0~1空间中的一类二阶微分算子对绝对连续函数的一致收     

齐型空间上算子的加权内插及其应用

本文在齐型空间上建立了算子的加权情形下的实内插定理，运用该结果，立即可推导出齐型空间上Ｃａｌｄｅｒｏｎ－Ｚｙｇｍｕｎｄ算子的加权Ｌ^ｐ有界性（ｐ＞１）和弱Ｌ¹有界性。     

广义球面平均算子在α-模空间的导数估计

本文研究了广义球面平均算子S^γ在α-模空间的导数估计,即算子?^βS^γ在α-模空间的有界性,该算子在调和分析以及各应用分支中都具有一定的理论价值.本文首先研究了该算子在模空间的有界性,由于模空间的分解方式具有较好的性质,本文通过精细的计算和格点估计得到了该算子在模空间全指标范围有界的充要条件.随后,本文研究了该算子在一般的α-模空间的有界性,得到了有界性成立的充分条件和必要条件.     

Abstract Hardy-Sobolev spaces and interpolation

The purpose of this work is to describe an abstract theory of Hardy-Sobolev spaces on doubling Riemannian manifolds via an atomic decomposition. We study the real interpolation of these spaces with Sobolev spaces and finally give applications to Riesz inequalities.     

Maximal regularity in continuous interpolation spaces and quasilinear parabolic equations

In this paper we establish a geometric theory for abstract quasilinear parabolic equations. In particular, we study existence, uniqueness, and continuous dependence of solutions. Moreover, we give conditions for global existence and establish smoothness properties of solutions. The results are based on maximal regularity estimates in continuous interpolation spaces. An important new ingredient is that we are able to show that quasilinear parabolic evolution equations generate a smooth semiflow on the trace spaces associated with maximal regularity, which are the natural phase spaces in this framework. Received August 10, 2000; accepted September 20, 2000.     

Interpolation of Hardy spaces on circular domains

In the paper, abstract interpolation of Hardy spaces on circular domains is studied. In particular, an extension of Peter Jones's result on the interpolation of Hardy spaces on the disc to multiply‐connected domains is presented. Moreover, some applications in approximation theory are given.     

Hermite插值算子在Orlicz空间内的逼近

插值算子逼近是逼近论中一个非常有趣的问题,尤其是以一些特殊的点为结点的插值算子的逼近问题很受人们的关注.研究了以第一类Chebyshev多项式零点为插值结点的Hermite插值算子在Orlicz范数下的逼近.     

Estimates for a family of multi-linear forms

We consider a special class of the multi-linear forms studied by Brascamp and Lieb (1976) [7]. For these forms, we give a characterization of the Lp spaces for which the form is bounded. This characterization appears in earlier work of Barthe (1998) [1]. We use this characterization to study a non-linear map that arises in scattering theory.     

Notes on limits of Sobolev spaces and the continuity of interpolation scales

We extend lemmas by Bourgain-Brezis-Mironescu (2001), and Maz'ya-Shaposhnikova (2002), on limits of Sobolev spaces, to the setting of interpolation scales. This is achieved by means of establishing the continuity of real and complex interpolation scales at the end points. A connection to extrapolation theory is developed, and a new application to limits of Sobolev scales is obtained. We also give a new approach to the problem of how to recognize constant functions via Sobolev conditions.

     

Interpolation on weak martingale Hardy space

By the weak atomic decompositions of weak martingale Hardy spaces, we investigate the interpolation spaces between weak martingale Hardy spaces and martingale Hardy spaces.     

一种广义插值法

本文考虑一种广义插值问题，插值条件为小区间上的积分值，以弥补现有的插值方法在L2空间不再适用的不足，除了多项式插值外，还讨论了两种一次样条插值方法。