Klep, Igor; Schweighofer, Markus A nichtnegativstellensatz for polynomials in noncommuting variables. (English) Zbl 1171.47060 Isr. J. Math. 161, 17-27 (2007). Reviewer: Vyacheslav A. Artamonov (Moskva) MSC: 47L30 16S36 47A13 46K99 × Cite Format Result Cite Review PDF Full Text: DOI Link
Lopushanskaya, E. V. Some problems of approximation of the generalized Carathéodory function in a special domain \(\Omega_{\nu}\). (English. Russian original) Zbl 1149.47029 Math. Notes 81, No. 5, 711-715 (2007); translation from Mat. Zametki 81, No. 5, 792-796 (2007). Reviewer: Jussi Behrndt (Berlin) MSC: 47B50 46C20 × Cite Format Result Cite Review PDF Full Text: DOI
Alpay, Daniel; Dijksma, Aad; Langer, Heinz; Shondin, Yuri The Schur transformation for generalized Nevanlinna functions: interpolation and self-adjoint operator realizations. (English) Zbl 1128.47016 Complex Anal. Oper. Theory 1, No. 2, 169-210 (2007). Reviewer: Ilie Valuşescu (Bucureşti) MSC: 47A48 47B50 47B25 47A06 30E05 46E22 × Cite Format Result Cite Review PDF Full Text: DOI Link