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Robert Lauter, Bertrand Monthubert, Victor Nistor

机译:罗伯特·劳特,贝特朗·蒙胡伯特,维克托·尼斯托尔

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We study properties and representations of the convolution algebra andthe algebra of pseudodifferential operators associated to a continuousfamily groupoid. We show that the study of representations of thealgebras of pseudodifferential operators of order zero completelyreduces to the study of the representations of the ideal ofregularizing operators. This recovers the usual boundedness theoremsfor pseudodifferential operators of order zero. We prove a structuretheorem for the norm completions of these algebras associated togroupoids with invariant filtrations. As a consequence, we obtaincriteria for an operator to be compact or Fredholm. We end with adiscussion of the significance of these results to the index theory ofoperators on certain singular spaces. For example, we give a newapproach to the question of the existence of spectral sections foroperators on coverings of manifolds with boundary. We expect that ourresults will also play a role in the analysis on more general singularspaces.
机译:我们研究卷积代数和与连续族groupoid相关的伪微分算子的代数的性质和表示。我们表明,零阶伪微分算子的代数表示的研究完全简化了正则化算子理想表示的研究。这恢复了零阶伪微分算子的通常有界性定理。我们证明了与具有不变过滤的类群相关的这些代数的范数完成的结构定理。结果,我们获得了使操作员变得紧凑或弗雷德霍尔姆的准则。最后,我们讨论了这些结果对某些奇异空间上的算子索引理论的重要性。例如,我们为存在边界的流形覆盖上的算子的频谱部分的存在提供了一种新的解决方法。我们希望我们的结果在更一般的奇异空间的分析中也能发挥作用。

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