The operator Fejer-Riesz theorem
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The Fejer-Riesz theorem has inspired numerous generalizations in one and several variables, and for matrix- and operator-valued functions. This paper is a survey of some old and recent topics that center around Rosenblum's operator generalization of the classical Fejer-Riesz theorem.
33 pages. To appear in the The Paul R. Halmos memorial volume in the series Operator Theory: Advances and Applications, published by Birhauser, edited by Sheldon Axler, Peter Rosenthal and Donald Sarason
33 pages. To appear in the The Paul R. Halmos memorial volume in the series Operator Theory: Advances and Applications, published by Birhauser, edited by Sheldon Axler, Peter Rosenthal and Donald Sarason