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math.FA2016
Bessel orbits of normal operators
Friedrich Philipp
Given a bounded normal operator in a Hilbert space and a fixed vector , we elaborate on the problem of finding necessary and sufficient conditions under which $(A^kx)_{k\in\…
math.FA2016
The effect of perturbations of linear operators on their polar decomposition
Richard Duong, Friedrich Philipp
The effect of matrix perturbations on the polar decomposition has been studied by several authors and various results are known. However, for operators between infinite-dimensional…