most citedBounded Real Lemma and structured singular value versus diagonal scaling: the free noncommutative setting

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math.FA2021

Polar decompositions of quaternion matrices in indefinite inner product spaces

G. J. Groenewald, D. B. Janse van Rensburg, A. C. M. Ran +2

Polar decompositions of quaternion matrices with respect to a given indefinite inner product are studied. Necessary and sufficient conditions for the existence of an -polar deco…