References
- Alpay , D. , Dijksma , A. , Rovnyak , J. and de Snoo , H.S.V. 1997 . “ Schur functions, operator colligations, and reproducing kernel Pontryagin spaces ” . In Oper. Theory Adv. Appl , Basel : Birkhäuser Verlag .
- Belyi , S.V. and Tsekanovskiǐ , E.R. 1997 . Realization theorems for operator—valued R— functions” . Operator theory: Advances and Applications , 98 : 55 – 91 .
- Belyi , S.V. and Tsekanovskiǐ , E.R. 2000 . On classes of realizable operator—valued R—functions” . Operator theory: Advances and Applications , 115 : 85 – 112 .
- Brodskiǐ . 1969 . Triangular and Jordan representations of linear operators , Moscow : Nauka . (Russian)
- Brodskiǐ , M.S. and Livšic , M.S. 1958 . Spectral analysis of non—selfadjoint operators and intermediate systems” . Uspekhi Matem. Nauk, XIII , 79 ( 1 ) : 3 – 84 . (Russian)
- Gesztesy F. Tsekanovskiǐ E.R. On matrix—valued Herglotz functions Math. Nachr., (to appear)
- Gesztesy , F. , Makarov , K.A. and Tsekanovskiǐ , E.R. 1998 . An addendum to Kreǐn's formula . J. Math. Anal. Appl , 222 ( 1 ) : 594 – 606 .
- Hassi S. de Snoo H.S.V. Tsekanovskiǐ E.R. Commutative and noncommutative representations of matrix—valued Herglotz—Nevanlinna functions Applicable Analysis, (to appear)
- Livšic , M.S. 1954 . On spectral decomposition of linear non—selfadjoint operators” . Math. Sbornik , 30 ( 76 ) : 145 – 198 . (Russian)
- Livšic , M.S. 1966 . Operators, oscillations, waves , Moscow : Nauka . (Russian)
- Livšic , M.S. and Potapov , V.P. 1950 . A theorem on the multiplication of characteristic matrix— functions . Dokl. Akad. Nauk SSSR , 72 : 625 – 628 . (Russian)
- Nagy , B. Sz. and Foias , C. 1970 . Harmonic analysis of operators on Hilbert space , New York : North—Holland .