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Zusammenfassung: | <jats:p>In this paper we give a necessary and sufficient condition, in terms of the coefficients of ?, in order for the Toeplitz operator T? to be semi-quasitriangular when ? is a trigonometric polynomial of degree two and has real coefficients.</jats:p> |
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Umfang: | 729-735 |
ISSN: |
0354-5180
2406-0933 |
DOI: | 10.2298/fil1703729k |