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A constructive proof of a noncommutative Fejér-Riesz theorem
. In this paper, we present a constructive proof of Popescu’s Fej´er-Riesz theorem for noncommuting polynomials representing nonnegative “multi-Toeplitz” operators.
期刊介绍:
''Operators and Matrices'' (''OaM'') aims towards developing a high standard international journal which will publish top quality research and expository papers in matrix and operator theory and their applications. The journal will publish mainly pure mathematics, but occasionally papers of a more applied nature could be accepted. ''OaM'' will also publish relevant book reviews.
''OaM'' is published quarterly, in March, June, September and December.