Two New BMO Spaces and Sharp Operators of B-Valued Martingale

For Banach space-valued martingale, two new BMO spaces, namely BMO (X), resp-BMO (X), and two new sharp operators, namely, resp. generated by the condition-al p-mean-square resp. p-mean-square operator are introduced, and then, the connections betweenBMO (X) and BMO;, BMO(X) and BMO and and are investigated. The resultsobtained here yield a new charactrization of the convexity and smoothness of Banach space.

Real Interpolation Between B-valued Martingale Hardy Spaces

The interpolation spaces between Banach space valued martingale Hardy spaces, between Hardy and BMO spaces are identified respectively. Some results obtained here are connected closely with the convexity and smoothness of the Banach space which the martingales take values in.

BANACH SPACE VALUED QUASI-EVENTUAL MARTINGALES

This article investigates convergence, transforms and q-square summability of banach space valued quasi-eventual martingales. Some basic results of Banach space valued martingales are improved and extended.

Hàjek-Rèniy Type Inequality for Banach Space Valued Martingales and Its Applications

In this paper,we establish the Hàjek-Rèniy type inequality for Banach space valued martingales generalizing the recent results of Tómcs and L'ibor [1].Then p-uniformly smoothable Banach space is characterized in terms of the Hàjek-Rèniy type inequality for Banach space valued martingales.Those results generalize the recent results of Gan Shixin [2].

The Hjek-Rnyi Inequlity For Banach Space Valued Random Variable Sequences and Its Application

In this paper we prove the following Hajek Renyi inequality:Let 0<p≤1 ,then for any Banach space B , any L p integrable B valued random variable sequence {D n,n≥1} ,any real number sequence {b n,n≥1} with 0<b n↑∞ ,any integer n≥1 ,there exits a constant C=C p>0 (only depending on p ) such thatP( sup j≥nji=1D ib j≥ε)≤Cε -p (∞j=n+1E‖D j‖ pb p j+nj=1E‖D j‖ pb p n) In the other direction,we prove some strong laws of large numbers and the integrability of the maximal functions for B valued random variable sequences by using this inequality and the Hajeck Renyi inequality we have obtained recently.Some known results are extended and improved.

A. S. Convergence of Two-Parameter Banach Space Valued Martingales and the Radon-Nikodym Property of Banach Spaces

In this paper, we prove that under the F4 condition, any L log+ L bounded two-parameter Banach space valued martingale converges almost surely to an integrable Banach space valued random variable if and only if the Banach space has the Radon-Nikodym property. We further prove that the above conclusion remains true if the F4 condition is replaced by the weaker local F4 condition.

On the Limiting Behavior of Weighted Partial Sums for B Valued Martingale Difference Sequences

Let {Xn, n≥1} be a martingale difference sequence and {a nk , 1?k?n,n?1} an array of constant real numbers. The limiting behavior of weighted partial sums ∑ k=1 n a nk X k is investigated and some new results are obtained.

On the Strong Law of Large Numbers for Non-Independent B-Valued Random Variables

This paper investigates some conditions which imply the strong laws of large numbers for Banach space valued random variable sequences. Some generalizations of the Marcinkiewicz-Zygmund theorem and the Hoffmann-J?rgensen and Pisier theorem are obtained. Key words strong law of large numbers - Banach space valued random variable sequence - p-smoothable Banach space CLC number O 211.4 - O 211.6 Foundation item: Supported by the National Natural Science Foundation of China (10071058)Biography: Gan Shi-xin (1939-), male, Professor, research direction: martingale theory, probability limiting theory and Banach space geometry theory.

Some Strong Laws of Large Numbers for Blockwise Martingale Difference Sequences in Martingale Type p Banach Spaces

For a blockwise martingale difference sequence of random elements {Vn, n ≥ 1} taking values in a real separable martingale type p （1 ≤ p ≤ 2） Banach space, conditions are provided for strong laws of large numbers of the form limn→∞ Vi/gn = 0 almost surely to hold where the constants gn ↑∞. A result of Hall and Heyde [Martingale Limit Theory and Its Application, Academic Press, New York, 1980, p. 36] which was obtained for sequences of random variables is extended to a martingale type p （1〈 p ≤2） Banach space setting and to hold with a Marcinkiewicz-Zygmund type normalization. Illustrative examples and counterexamples are provided.

Banach值鞅变换算子的有界性

本文运用Banach值鞅不等式和鞅空间的相互嵌入关系 ,讨论了Banach空间值鞅空间上鞅变换算子Tv 的有界性 。

Banach空间值鞅变换的有界性及其应用

本文给出关于Banach空间值鞅变换算子有界性的一种新的处理方法,得到一系列带有广泛性的结果,并应用鞅变换算子的有界性刻画了Banach空间的一致光滑性和一致凸性,使得许多已有文献中的结论成为本文的特例.

关于复Banach空间的几何学

本文介绍复Ｂａｎａｃｈ空间几何学近年来的发展状况及其与向量值调和分析、Ｂ值鞅理论的联系．文章包括以下内容：１．几个反例；２．复凸性与复凸模；３．解析Ｒａｄｏｎ－Ｎｉｋｏｄｙｍ性质的分析特征；４．解析Ｒａｄｏｎ－Ｎｉｋｏｄｙｍ性质的几何特征；５．几种ＲＮ性质的比较；６．ＰＬ一致凸性的鞅刻画；７．Ｈ一致凸性的鞅刻画；８．向量值Ｈａｒｄｙ与Ｐａｌｅｙ不等式；９．解析ＵＭＤ空间．

两指标B值强鞅空间与Banach空间的几何性质

讨论了两指标B值强鞅空间的相互嵌入关系与Banach空间的几何性质之间的联系 :Banach空间的几何性质决定着强鞅空间的相互嵌入关系 ;

鞅变换与Banach空间的几何性质

本文应用鞅变换技巧建立了 B 值鞅的若干不等式。证明了这些不等式是 Banach空间的凸性和光滑性的特征性质。此外还讨论了若干类型的鞅空间的相互关系。

两指标B值强鞅平削算子不等式与Banach空间的几何性质

证明了两指标B值强鞅平削算子不等式,讨论了由平削算子生成的两指标B值强鞅空间的相互嵌入关系,其结果与Banach空间的几何性质有密切联系.

Banach空间值鞅的两种新型BMO空间和Sharp算子

借助于 ｐ 条件均方算子和 ｐ 均方算子， 首先引入了 Ｂａｎａｃｈ 空间值鞅的两种新型 Ｂ Ｍ Ｏ 空间 Ｂ Ｍ Ｏσ（ｐ ）ｒ （ Ｘ）和 Ｂ Ｍ Ｏ Ｓ（ｐ ）ｒ （ Ｘ）以及两种新型 ｓｈａｒｐ 算子 ｆσ（ｐ）ｒ 和 ｆ Ｓ（ｐ）ｒ ． 并且讨论了 Ｂ Ｍ Ｏσ（ｐ ）ｐ （ Ｘ）与 Ｂ Ｍ Ｏ＋ｐ （ Ｘ）， Ｂ Ｍ Ｏ Ｓ（ｐ）ｐ （ Ｘ）与 Ｂ Ｍ Ｏｐ （ Ｘ）的相互嵌入关系， 以及ｆσ（ｐ ）ｐ 与 ｆ＃ｐ ， ｆ Ｓ（ｐ）ｐ 与ｆ＃ｐ 之间的凸Φ不等式， 所得结果给出了 Ｂａｎａｃｈ

B值鞅不等式与Banach空间几何性质的刻划

本文建立了Ｂ值鞅的极大函数ｆ＊，平削函数的凸Φ－不等式，反过来用这些不等式刻划了Ｂａｎａｃｈ空间的凸性和光滑性，同时给出了超自反空间以及与Ｈｉｌｂｅｒｔ空间同构的Ｂａｎａｃｈ空间的特征。本文的结论推广了一些熟知的重要结果。

Banach空间值弱Garsia型鞅空间及其原子分解(英文)

定义了Banach空间值弱Garsia型鞅空间和三种类型原子,证明了Banach空间值弱Garsia型鞅空间上的四个原子分解定理,并利用这些定理,得到Banach空间值弱Garsia型鞅空间的互相嵌入关系,其结果与Banach空间的凸性和光滑性有密切关系.

Banach空间值独立随机变量序列的Hàjek-Rènyi不等式

证明了Banach空间值独立随机变量序列的Hàjek-Rènyi型不等式,并利用该不等式证明了Banach空间值独立随机变量序列的强大数定律,所得结果刻画了Banach空间的p型性质.

Banach值鞅变换与可乘Φ不等式

定义了可乘Φ不等式,并利用Banach值Orlicz鞅空间的相互嵌入关系,讨论了Banach值Orlicz鞅空间上鞅变换算子Tv的可乘Φ不等式与Banach空间几何性质之间的关系.