Partially isometric matrices: a brief and selective survey
classification
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math.OA
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resultsisometricmatricespartiallyproblemsimilaritysurveybrief
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We survey a variety of results about partially isometric matrices. We focus primarily on results that are distinctly finite-dimensional. For example, we cover a recent solution to the similarity problem for partial isometries. We also discuss the unitary similarity problem and several other results.
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