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arXiv 1005.1832math.FA
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Schatten类傅里叶积分算子

Schatten class Fourier Integral Operators

Shannon Bishop

摘要:

相位足够光滑的傅里叶积分算子作用于函数的时频分量。然而,时间-频率分析只是最近才被用来分析这些运营商。在本文中,我们表明,如果一个傅里叶积分算子有一个光滑的相位函数和它的符号是良好的本地化的时间和频率,那么该运营商是Schatten \( p \) -类\( p \in [1,2] \),包括在混合调制空间的符号作为适当的措施的时间-频率本地化。我们的主要结果是尖锐的意义上说,较大的混合调制空间必然包含符号的傅里叶积分算子,不是Schatten \( p \)类。

英文摘要:

Fourier integral operators with sufficiently smooth phase act on the time-frequency content of functions. However time-frequency analysis has only recently been used to analyze these operators. In this paper, we show that if a Fourier integral operator has a smooth phase function and its symbol is well-localized in time and frequency, then the operator is Schatten \( p \)-class for \( p \in [1,2] \), with inclusion of the symbol in mixed modulation spaces serving as the appropriate measure of time-frequency localization. Our main results are sharp in the sense that larger mixed modulation spaces necessarily contain symbols of Fourier integral operators that are not Schatten \( p \)-class.

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