Dept. Math, Hokkaido Univ. EPrints Server

Hyponormal Toeplitz Operators And Zeros Of Polynomials

Preprint Series # 783
Nakazi, Takahiko Hyponormal Toeplitz Operators And Zeros Of Polynomials. (2006);

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Abstract

The problem of hyponormality for Toeplitz operators with (trigonometric) polynomial symbols is studied. We give a necessary and sufficient condition using the zeros of the analytic polynomial induced by the Fourier coefficients of the symbol.

Item Type:Preprint
Subjects:47-xx OPERATOR THEORY
ID Code:1528