2024-03-19T10:57:15Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/695912022-11-17T02:08:08Zhdl_2115_45007hdl_2115_116Hyponormal Toeplitz Operators And Zeros Of PolynomialsNakazi, TakahikoTrigonometric Toeplitz operatorshyponormal operatorPick problem410The 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.Department of Mathematics, Hokkaido UniversityDepartmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/69591info:doi/10.14943/83933https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/69591/1/pre783.pdfHokkaido University Preprint Series in Mathematics783152006engpublisher