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Jordan Loops and Decompositions of Operators

Published online by Cambridge University Press:  20 November 2018

Arlen Brown
Affiliation:
Indiana University, Bloomington, Indiana
Carl Pearcy
Affiliation:
University of Michigan Ann Arbor, Michigan
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Let be a separable, infinite dimensional, complex Hilbert space, and let denote the algebra of all bounded linear operators on . In what follows we shall denote the spectrum, essential spectrum, and left essential spectrum of an operator T in , respectively. Furthermore, if and T1 is unitarily equivalent to a compact perturbation of an operator T2, then we write T1~ T2, and if the compact perturbation can be chosen to have norm less than e, we write T1 ~ T2(ϵ).

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1977

References

1. Apostol, C., Foias, C., and Voiculescu, D., Some results on non-quasitriangular operators. IV, Revue Roum. Math. Pures et Appl. 18 (1973), 487514.Google Scholar
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3. Douglas, R. G. and Pearcy, C., Invariant subspaces of non-quasitriangular operators, Proc. Conf. Op. Theory, Springer-Verlag Lecture Notes in Mathematics, Vol. 3-5 (1973), 1357.Google Scholar
4. Foias, C., Pearcy, C., and Voiculescu, D., The staircase representation of biquasitriangular operators, Mich. Math. J. 22 (1975), 343352.Google Scholar
5. Foias, C. Biquasitriangular operators and quasisimilarity, submitted to Indiana U. Math. J.Google Scholar
6. Halmos, P. R., Limits of shifts, Acta Sci. Math. (Szeged) 34 (1973), 131139.Google Scholar
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9. Rudin, W., Real and complex analysis (McGraw-Hill, New York, 1966).Google Scholar
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