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arXiv 1003.3719math.OAmath.FA
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非交换环面和Gabor框架中的投影

Projections in noncommutative tori and Gabor frames

Franz Luef

摘要:

我们描述了两个看似不同的问题之间的联系:(a)在非交换环面的投影的建设,(b)紧的Gabor框架的建设。本研究依赖于非交换环面上的投射模的Gabor分析的解释。主要结果表明,Rieffel关于非交换环面上投影存在的条件等价于紧Gabor框架的Wexler-Raz双正交关系。因此,我们能够调用的结果存在的Gabor框架在建设的非交换环面的投影。特别是,与高斯生成的Gabor框架相关的投影被证明是博卡投影。我们的方法,博卡的投影,使我们能够表征的范围存在的博卡的投影。我们的主要结果的介绍提供了一个自然的方法,Wexler-Raz双正交关系的Hilbert C*-模在非交换环上。

英文摘要:

We describe a connection between two seemingly different problems: (a) the construction of projections in noncommutative tori, (b) the construction of tight Gabor frames. The present investigation relies an interpretation of projective modules over noncommutative tori in terms of Gabor analysis. The main result demonstrates that Rieffel's condition on the existence of projections in noncommutative tori is equivalent to the Wexler-Raz biorthogonality relations for tight Gabor frames. Therefore we are able to invoke results on the existence of Gabor frames in the construction of projections in noncommutative tori. In particular, the projection associated with a Gabor frame generated by a Gaussian turns out to be Boca's projection. Our approach to Boca's projection allows us to characterize the range of existence of Boca's projection. The presentation of our main result provides a natural approach to the Wexler-Raz biorthogonality relations in terms of Hilbert C*-modules over noncommutative tori.

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