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arXiv 1712.06360math.FA
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关于infinite-dimensional矩问题

On the infinite-dimensional moment problem

Konrad Schmüdgen

摘要:

本文研究了(不一定是非生成的)交换酉实代数$A$上的矩问题.我们定义$A$上的矩泛函为线性泛函,它可以表示为$A$的特征标关于柱测度的积分.我们的主要结果提供了这样的整表示为$A_+$ -正线性泛函(广义Haviland定理)和正泛函满足Carleman条件。作为应用,我们解决了实向量空间$V$的对称代数$S(V)$的矩问题。作为副产品,我们得到了核型空间$V$上$S(V)$的矩问题和桶核拓扑代数$A$上连续正泛函的积分分解的新方法。

英文摘要:

This paper deals with the moment problem on a (not necessarily finitely generated) commutative unital real algebra $A$. We define moment functionals on $A$ as linear functionals which can be written as integrals over characters of $A$ with respect to cylinder measures. Our main results provide such integral representations for $A_+$--positive linear functionals (generalized Haviland theorem) and for positive functionals fulfilling Carleman conditions. As an application we solve the moment problem for the symmetric algebra $S(V)$ of a real vector space $V$. As a byproduct we obtain a new approaches to the moment problem on $S(V)$ for a nuclear space $V$ and to the integral decomposition of continuous positive functionals on a barrelled nuclear topological algebra $A$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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