A note on Toeplitz matrices and unitary equivalence.
Bollettino della Unione matematica italiana, Série 3, Tome 15 (1960) no. 1, pp. 6-9.

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Putnam, C. R. A note on Toeplitz matrices and unitary equivalence.. Bollettino della Unione matematica italiana, Série 3, Tome 15 (1960) no. 1, pp. 6-9. https://geodesic-test.mathdoc.fr/item/BUMI_1960_3_15_1_a1/

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[3] T. Kato , On finite-dimensional perturbations of self-adjoint operators, «Jour. Math. Soc. Japan», vol. 9 (1957), pp. 239-249. | fulltext mini-dml | MR | Zbl

[4] T. Kato , Perturbations of continuons spectra by trace class operators, «Proc. Japan Acad.», vol. 38 (1957), pp. 260-264. | fulltext mini-dml | MR | Zbl

[5] C. R. Putnam , On commutators and Jacobi matrices, «Proc. Amer. Math. Soc.», vol. 7 (1956), pp. 1026-1030. | MR | Zbl

[6] C. R. Putnam , Commutators and absolutely continuos operators, «Trans. Amer. Math. Soc.», vol. 87 (1958), pp. 513-525. | MR | Zbl

[7] C. R. Putnam , On Toeplitz matrices, absolute continuity, and unitary equivalence, «Pacific Jour. Math.», vol. 9 (1959, pp. 838-846. | fulltext mini-dml | MR | Zbl

[8] M. Rosenblum , Perturbations of the continuos spectrum and unitary equivalence, «Pacific Jour. Math.», vol. 7 (1957), pp. 997-1010. | fulltext mini-dml | MR | Zbl

[9] M. Rosenblum , The absolute continuity of Toeplitz's matrices, Technical Note No. 14, Air Research and Development Command (July, 1959), University of Virginia. | fulltext mini-dml | MR | Zbl