On time dependent orthogonal polynomials on the unit circle

• Published in: Український математичний журнал
• Date: 1994
• Main Authors: Ben-Artzi, A., Gohberg, I.
• Format: Article
• Language: English
• Published: Інститут математики НАН України 1994
• Subjects: Статті
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/152530
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: On time dependent orthogonal polynomials on the unit circle / А. Ben-Artzi, I. Gohberg // Український математичний журнал. — 1994. — Т. 46, № 1-2. — С. 18–36. — Бібліогр.: 11 назв. — англ.

Two index formulas for operators defined by infinite band matrices are proved. These results may be interpreted as a generalization of the classical theorem of M. G. Krein for orthogonal polynomials. The proofs are based on dichotomy and nonstationary inertia theory. Доведено дві формули індексу для...