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Lookup NU author(s): Dr Michael DritschelORCiD
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A multivariate version of Rosenblum's Fejér-Riesz theorem on outer factorization of trigonometric polynomials with operator coefficients is considered. Due to a simplification of the proof of the single variable case, new necessary and sufficient conditions for the multivariable outer factorization problem are formulated and proved. © 2005 American Mathematical Society.
Author(s): Dritschel MA, Woerdeman HJ
Publication type: Article
Publication status: Published
Journal: Transactions of the American Mathematical Society
ISSN (print): 0002-9947
ISSN (electronic): 1088-6850
Publisher: American Mathematical Society
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