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arXiv 0908.3420math.FAmath.CA
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混合调制空间及其在拟微分算子中的应用

Mixed Modulation Spaces and Their Application to Pseudodifferential Operators

Shannon Bishop

摘要:

利用框架技术刻画了积分算子的Schatten类性质.主要结果表明,如果积分算子的核的某些框架展开式的系数在(\ell^{2,p})中,则该算子是Schatten p-类的.作为推论,我们得出结论:如果一个拟微分算子的核或Kohn-Nirenberg符号位于一个特定的混合调制空间中,则该算子是Schatten p-类的.我们的推论改进了现有的Schatten类的伪微分算子的结果和推论是尖锐的,在这个意义上,较大的混合调制空间产生的运营商,不是Schatten类。

英文摘要:

This paper uses frame techniques to characterize the Schatten class properties of integral operators. The main result shows that if the coefficients of certain frame expansions of the kernel of an integral operator are in (\ell^{2,p}), then the operator is Schatten p-class. As a corollary, we conclude that if the kernel or Kohn-Nirenberg symbol of a pseudodifferential operator lies in a particular mixed modulation space, then the operator is Schatten p-class. Our corollary improves existing Schatten class results for pseudodifferential operators and the corollary is sharp in the sense that larger mixed modulation spaces yield operators that are not Schatten class.

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