A Toeplitz-like operator with rational symbol having poles on the unit circle. II. The spectrum
Ter Horst, S.
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This paper is a continuation of our study of a class of Toeplitz-like operators with a rational symbol which has a pole on the unit circle. A description of the spectrum and its various parts, i.e., point, residual and continuous spectrum, is given, as well as a description of the essential spectrum. In this case, the essential spectrum need not be connected in C . Various examples illustrate the results.