A characterization of operators on functionals of discrete-time normal martingales

A characterization of operators on functionals of discrete-time normal martingales
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离散时间正态鞅泛函算子的表征

DOI:
10.1080/07362994.2016.1248779
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发表时间:
2017-03
影响因子:
1.3
通讯作者:
Jinshu Chen
Jinshu Chen
中科院分区:
数学4区
文献类型:
--
作者:
Caishi Wang;Jinshu Chen

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摘要本文主要研究作用于离散时间正规鞅泛函的算子的特征。设是离散时间正态鞅,具有混沌表示性质。首先,我们引入了一个变换,称为2D-Fock变换,将算子从测试函数空间变换到M的广义函数空间。然后,我们刻画了连续线性算子从通过其2D-Fock变换。我们的特征定理表明,从到的连续线性算子与Γ × Γ上仅满足某种增长条件的函数之间存在一一对应,其中Γ表示的有限幂集.最后,我们给出了我们的特征定理的一些应用。
ABSTRACT In this article, we aim at characterizing operators acting on functionals of discrete-time normal martingales. Let be a discrete-time normal martingale that has the chaotic representation property. We first introduce a transform, called 2D-Fock transform, for operators from the testing functional space to the generalized functional space of M. Then we characterize continuous linear operators from to via their 2D-Fock transforms. Our characterization theorems show that there exists a one-to-one correspondence between continuous linear operators from to and functions on Γ × Γ that only satisfy some type of growth condition, where Γ designates the finite power set of . Finally, we give some applications of our characterization theorems.
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