The full infinite dimensional moment problem on semi-algebraic sets of generalized functions
The full infinite dimensional moment problem on semi-algebraic sets of generalized functions
复制标题
广义函数半代数集的全无限维矩问题
DOI:
10.1016/j.jfa.2014.06.012
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发表时间:
2014
影响因子:
1.7
通讯作者:
Infusino M
中科院分区:
文献类型:
--
作者:
Infusino M
We consider a generic basic semi-algebraic subset S of the space of generalized functions, that is a set given by (not necessarily countably many) polynomial constraints. We derive necessary and sufficient conditions for an infinite sequence of generalized functions to be realizable on S, namely to be the moment sequence of a finite measure concentrated on S. Our approach combines the classical results about the moment problem on nuclear spaces with the techniques recently developed to treat the moment problem on basic semi-algebraic sets of R d. In this way, we determine realizability conditions that can be more easily verified than the well-known Haviland type conditions. Our result completely characterizes the support of the realizing measure in terms of its moments. As concrete examples of semi-algebraic sets of generalized functions, we consider the set of all Radon measures and the set of all the measures having bounded Radon–Nikodym density wrt the Lebesgue measure.
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1982
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2002
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