ArticleOriginal scientific text
Title
On unbounded hyponormal operators III
Authors 1
Affiliations
- Institute of Mathematics, Polish Academy of Sciences, Cracow Branch, Św. Tomasza 30, 31-027 Kraków, Poland
Abstract
The paper deals mostly with spectral properties of unbounded hyponormal operators. Some nontrivial examples of such operators are given.
Bibliography
- J. Janas, On unbounded hyponormal operators, Ark. Mat. 27 (1989), 273-281.
- J. Janas, On unbounded hyponormal operators II, Integral Equations Operator Theory 15 (1992), 470-478.
- T. Kato, Positive commutators i[f(P),g(Q)], J. Funct. Anal. 96 (1991), 117-129.
- C. R. Putnam, The spectra of unbounded hyponormal operators, Proc. Amer. Math. Soc. 31 (1972), 458-464.
- C. R. Putnam, Spectra of polar factors of hyponormal operators, Trans. Amer. Math. Soc. 188 (1974), 419-428.
- M. Reed and B. Simon, Methods of Modern Mathematical Physics I: Functional Analysis, Academic Press, 1972.
- J. B. Stochel, Subnormality and generalized commutation relations, Glasgow Math. J. 30 (1988), 259-262.
- J. Weidmann, Linear Operators in Hilbert Spaces, Springer, 1980.
- D. Xia, Spectral Theory of Hyponormal Operators, Birkhäuser, 1983.