Noncommutative orlicz-hardy spaces

Let (Φ, Ψ) be a pair of complementary N-functions and HΦ(A)$H^{\Phi }\left(A\right)$ and HΨ(A)$H^{\Psi }\left(A\right)$ be the associated noncommutative Orlicz-Hardy spaces. We extend the Riesz, Szegö and inner-outer type factorization theorems of Hp(A)$H^p\left(A\right)$ to this case.     

CONVERGENCE OF WEIGHTED AVERAGES OF MARTINGALES IN NONCOMMUTATIVE BANACH FUNCTION SPACES

Let x =(xn)n≥1 be a martingale on a noncommutative probability space (M,T) and (wn)n≥1 a sequence of positive numbers such that Wn =n∑k=1wk → ∞ as n → ∞.We prove that x =(xn)n≥1 converges in E(M) if an...     

SZEGō TYPE FACTORIZATION THEOREM FOR NONCOMMUTATIVE HARDY-LORENTZ SPACES

We introduce noncommutative Hardy-Lorentz spaces and give the Szegō and inner-outer type factorizations of these spaces.     

Orlicz空间的局部U性质

给出Ｏｌｉｃｚ空间是局部Ｕ空间的充要条件。     

Orlicz空间的LURWC条件

本文给出Ｏｒｌｉｃｚ函数空间关于Ｌｕｘｅｍｂｅｒｇ范数ＬＵＲＷＣ点和ＬＵＲＷＣ性质判定准则。     

Absolutely L – Summing Norms of Diagonal Operators in lr and Limit Orders of Lexp – Summing Operators

We compute the absolutely L – summing norms of the diagonal operators acting on l_r (1 ≤ q, r < ∞) and determine the limit orders of the absolutely L_exp – summing operators.     

DECOMPOSITION FOR BERS-ORLICZ SPACES

ＤＥＣＯＭＰＯＳＩＴＩＯＮＦＯＲＢＥＲＳ－ＯＲＬＩＣＺＳＰＡＣＥＳＺｈａｏＲｕｈａｎ（赵如汉）（ＷｕｈａｎＩｕｓｔ．ｏｆＭａｔｈ．Ｓｃｉ．，ＡｃａｄｒｍｉａＳｉｎｄａ．，Ｗｕｈａｎ４３００７１，Ｃｈｉｎａ．）ＤＥＣＯＭＰＯＳＩＴＩＯＮＦＯＲＢＥＲＳ－...     

Linear functionals on nonlinear spaces and applications to problems from viscoplasticity theory

A classical result in the theory of monotone operators states that if C is a reflexive Banach space, and an operator A: C→C^* is monotone, semicontinuous and coercive, then A is surjective. In this paper, we define the ‘dual space’ C^* of a convex, usually not linear, subset C of some Banach space X (in general, we will have C^*⊃X^*) and prove an analogous result. Then, we give an application to problems from viscoplasticity theory, where the natural space to look for solutions is not linear. Copyright © 2007 John Wiley & Sons, Ltd.     

The Convergences of Bivariate Integral Jackson Interpolating Operators in Orlicz Spaces

ＴｈｅＣｏｎｖｅｒｇｅｎｃｅｓｏｆＢｉｖａｒｉａｔｅＩｎｔｅｇｒａｌＪａｃｋｓｏｎＩｎｔｅｒｐｏｌａｔｉｎｇＯｐｅｒａｔｏｒｓｉｎＯｒｌｉｃｚＳｐａｃｅｓ尚增科，王有一，盛保怀ＴｈｅＣｏｎｖｅｒｇｅｎｃｅｓｏｆＢｉｖａｒｉａｔｅＩｎｔｅｇｒａｌＪａｃ...     

Bernstein-Durrmeyer算子拟中插式在Orlicz空间中的逼近

本文在Orlicz空间中研究了Bernstein-Durrmeyer算子拟中插式B_n~(2r-1)(f,x)逼近性质.利用2r阶Ditzian-Totik模与K-泛函的等价性,Jensen不等式,H?lder不等式,Berens-Lorentz引理得到了逼近的正,逆和等价定理,从而推广了Bernstein-Durrmeyer算子拟中插式B_n~(2r-1)(f,x)在L_P空间的逼近结果.     

Orlicz序列空间的一致单调系数及应用

本文给出了Ｏｒｌｉｃｚ序列空间一致单调系数数值，同时给出了Ｏｒｌｉｃｚ序列空间具有一致单调性的条件，进而讨论具有一致单调性的Ｏｒｌｉｃｚ序列空间中的最佳逼近算子的一些特征。     

Stancu-Kantorovich算子在Ba空间的逼近

讨论Stancu-Kantorovich算子在Ba空间中的逼近阶与饱和性质，得到了逼所阶的一种估计与饱和性定理。     

Orlicz序列空间的（弱）正规结构和（LD）性质

本文讨论赋Ｏｒｌｉｃｚ范数的Ｏｒｌｉｃｚ序列空间ＬＭ，主要结果如下：（１）ＬＭ具有Ｌａｍｉ－Ｄｏｚｏ性质     

ON DIRICHLET TYPE SPACES AND α-BLOCH SPACES IN THE UNIT BALL OF Cn

In this paper, the authors study the inclusion relations between Dirichlet type spaces DT and α-Bloch spacesβα by means of higher radial derivative. The strictness and the best possibility of the inclusion relations are shown with constructive methods.Furthermore, they sharpen one of the results when T = n, which proves that a conjecture in [7] is true.     

TOPOLOGICAL DECOMPOSITIONS OF THE DUALS OF LOCALLY CONVEX VECTOR SEQUENCE SPACES

ABSTRACT

Let Λ be a scalar sequence space which is endowed with a normal locally convex topology. For a separated locally convex space E we denote by Λ(E) the vector space of all sequences g in E for which (>g(i),a<) ε Λ for all a ε E'. We define a locally convex topology ζ on Λ(E) and then characterize the dual of the ζ-closure (denoted by Λ_c (E)) of the finite sequences in Λ(E). We demonstrate the existence of a continuous projection from Λ(E)' onto a subspace of Λ(E)' which is isomorphic to Λ_c(E)'. Furthermore, we find a topological decomposition of Λ^α _c (E)”, where one of the factors is isomorphic to Λ;^α(E). These results are then applied to find necessary and sufficient conditions for Λ^α(E) to be semi-reflexive. A parallel development yields the same results for the space Λ(E') of all sequences f in E' for which (>x, f(i)<) ε Λ; for all x ε E, when E is barrelled. We conclude the paper by application of the results on vector sequence spaces to spaces of operators—including for instance, necessary and sufficient conditions for L_b (E,Λ;) and L_b (Λ,E) to be semi-reflexive.     

Spherical limits for Riesz potentials of functions in central generalized Orlicz-Morrey spaces on the unit ball

We introduce central generalized Orlicz–Morrey spaces on the unit ball, and study the weighted behavior of spherical means for Riesz potentials of functions in those spaces. We also treat Orlicz–Morrey–Sobolev functions which are monotone in the punctured unit ball in the sense of Lebesgue.     

Besov 空间上的算子插值定理

本文研究了算子的插值问题.利用Riesz-Thorin定理的证明方法,并运用Daubechies小波得到了Besov空间上的线性算子的插值定理.     

一类函数空间的刻画

在Ｏｒｌｉｃｚ空间Ｌ_p（Ｒ^ｎ）中给出一类于空间Ｃ_p^a（Ｒ^ｎ）,利用一标准算子序列的逼近,得到 其等价刻画．     

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。     

Minimal projections in spaces of functions of N variables

We will construct a minimal and co-minimal projection from L^p([0,1]ⁿ) onto L^p([0,1]^n₁)++L^p([0,1]^n_k), where n=n₁++n_k (see Theorem 2.9). This is a generalization of a result of Cheney, Halton and Light from (Approximation Theory in Tensor Product Spaces, Lecture Notes in Mathematics, Springer, Berlin, 1985; Math. Proc. Cambridge Philos. Soc. 97 (1985) 127; Math. Z. 191 (1986) 633) where they proved the minimality in the case n=2. We provide also some further generalizations (see Theorems 2.10 and 2.11 (Orlicz spaces) and Theorem 2.8). Also a discrete case (Theorem 2.2) is considered. Our approach differs from methods used in [8,13,20].