Partially isometric matrices: a brief and selective survey

Published 27 Mar 2019 in math.FA and math.OA | (1903.11648v1)

Abstract: 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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