赋Orlicz范数的Orlicz—Lorentz空间的严格凸性

本文对于赋Ｌｕｘｅｍｂｕｒｇ范数的Ｏｒｌｉｃｚ－Ｌｏｒｅｎｔｚ空间     

解析算子函数的端点性质

本文我们证明了不存在具有性质ＫＴ（ρ）的可逆算子值函数ｆ（ｚ）（ｚ∈△）满足     

AN UPPER BOUND OF THE ESSENTIAL NORM OF COMPOSITION OPERATORS BETWEEN WEIGHTED BERGMAN SPACES

In this paper, we define the generalized counting functions in the higher dimensional case and give an upper bound of the essential norms of composition operators between the weighted Bergman spaces on the unit ball in terms of these counting functions. The sufficient condition for such operators to be bounded or compact is also given.     

推广的Volterra复合算子的本性范数

本文研究单位圆盘上Bergman型空间到Zygmund型空间上的一类推广的Volterra复合算子.利用符号函数ϕ和g刻画这类算子的有界性、紧性,并计算其本性范数.     

Derivatives of harmonic mixed norm and bloch-type spaces in the unit ball of R

Let H(B) be the set of all harmonic functions f on the unit ball B of Rn. For 0 < p, q ≤∞ and a normal weight φ, the mixed norm space Hp,q, φ(B) consists of all functions f in H(B) for which the mixed norm p,q, φ < ∞. In this article, we obtain some characterizations in terms of radial, tangential, and partial derivative norms in Hp,q, φ(B). The parallel results for the Bloch-type space are also obtained. As an application, the analogous problems for polyharmonic functions are discussed.     

Equivalence of norms on operator space tensor products of -algebras

The Haagerup norm on the tensor product of two -algebras and is shown to be Banach space equivalent to either the Banach space projective norm or the operator space projective norm if and only if either or is finite dimensional or and are infinite dimensional and subhomogeneous. The Banach space projective norm and the operator space projective norm are equivalent on if and only if or is subhomogeneous.

     

L~(p(x))(Ω)中关于Luxemburg范数和共轭Orlicz范数间的一个最佳不等式

令 L~(p(x))(Ω)为变指数 Lebesgue空间,其中 p：Ω→[1,∞]．‖·‖_(p(x))和‖·‖_(p(x))~o 分别表示 L~(p(x))(Ω)中的 Luxemburg 范数和共轭 Orlicz 范数．本文证明成立最佳不等式‖·‖_(p(x))≤‖·‖_(p(x))~o ≤ d_(p-,p )‖·‖_(p(x)),其中 d_(p-,p )是一个依赖于 p-=essinf_Ωp(x)和 p =esssup_Ωp(x)的常数．当1＜p-＜p ＜∞时, (?) 当 p-=1或 p =∞时,d(p-,p )是相应的极限形式．     

多圆柱上Bloch空间中的复合算子的本性模

设Un是n维复空间Cn中的单位多圆柱,φ=(φ1…,φn)是Un到自身的一个全纯映射.本文给出了多圆柱Un上Bloch空间β(Un)和小Bloch空间β0*(Un)中的复合算子Cφ的本性模的估计,作为它的应用,得到了β(Un)和β0*(Un)中的复合算子Cφ紧的充要条件.     

四元数中的真半范数

讨论了四元数中的真半范数，并给出了它的一般形式，它适合核维数分别为1，2，3的情形，推广了复数域中的真半范数的一般形式，给出了一个较好的结果．     

赋Orlicz范数的Orlicz-Bochner空间E_M(μ,X)的对偶空间

本文研究了Orlicz-Bochner空间E_M(μ,X)的对偶空间的充分必要条件.运用Radon-Nikodym性质,给出Orlicz-Bochner空间L_((N))(μ,X~*)为E_M(μ,X)~*的对偶空间当且仅当X~*具Radon-Nikodym性质,提升了Orlicz空间及Lebesgue-Bochner空间的相关结论.     

Analytic norms in Orlicz spaces

It is shown that an Orlicz sequence space admits an equivalent analytic renorming if and only if it is either isomorphic to or isomorphically polyhedral. As a consequence, we show that there exists a separable Banach space admitting an equivalent -Fréchet norm, but no equivalent analytic norm.

     

拟鞅的Fefferman不等式和对偶定理

本文讨论了拟鞅的Fefferman不等式和Hardy空间的对偶空间. 利用鞅的相关结果和Doob分解的方法, 把鞅的Fefferman不等式推广到拟鞅情形, 并描述了拟鞅的Hardy空间Ĥ_p在1 < p < ∞)时的对偶空间.     

若干全纯函数空间上的一类积分算子

给定g∈H(D),我们刻画了H1,∞空间到混合模空间以及Bloch型空间(或小Bloch型空间)上一类积分算子Lg的有界性和紧性.此处Lgf(z)=∫0zf′(t)g(t)dt.     

C~n中单位球上一些全纯函数空间的刻画

本文讨论了多复变中混合赋范空间、Dirichlet型空间、Bloch型空间等全纯函数空间的一些等价刻画,获得了一系列充要条件.     

Orlicz spaces without extreme points

Orlicz function and sequence spaces unit balls of which have no extreme points are completely characterized for both (the Orlicz and the Luxemburg) norms. Their subspaces of order continuous elements, with the norms induced from the whole Orlicz spaces without extreme points in their unit balls are also characterized. The well-known spaces L₁ and c₀ with unit balls without extreme points are covered by our results. Moreover, a new example of a Banach space without extreme points in its unit ball is given (see Example 1). This is the subspace a(L₁+L_∞) of order continuous elements of the space L₁+L_∞ equipped with the norm whenever 0<a<∞ and μ(T)>1/a.     

The Gleason''''s problem for some polyharmonic and hyperbolic harmonic function spaces

LetΩ Rn be a bounded convex domain with C2 boundary. For 0相似文献   

Projection solution methods for one nonlinear singular integral equation

In this paper we consider a general projection method for the solution of a nonlinear singular integral equation and its applications in the method of orthogonal polynomials, the subdomains method, and the collocation method.     

Musielak-Orlicz序列空间的粗性

作者给出赋Luxemburg范数Musielak-Orlicz序列空间光滑点的支撑泛函的刻画．进一步,给出赋Orliez范数和赋Luxemburg范数Musielak-Orlicz序列空间的粗性,点态粗的充分必要条件．     

Amemiya Norm Equals Orlicz Norm in Musielak-Orlicz Spaces

Let （Ω,μ） be a a-finite measure space and Φ ： Ω × [0,∞） → [0, ∞] be a Musielak-Orlicz function. Denote by L^Φ（Ω） the Musielak-Orlicz space generated by Φ. We prove that the Amemiya norm equals the Orlicz norm in L^Φ（Ω）.