Article ID Journal Published Year Pages File Type
6416229 Linear Algebra and its Applications 2015 8 Pages PDF
Abstract

We give a new formulation and proof of a theorem of Halmos and Wallen on the structure of power partial isometries on Hilbert space. We then use this theorem to give a structure theorem for a finite set of partial isometries which star-commute: each operator commutes with the others and with their adjoints.

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Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory
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