Products of positive operators
Published online by Cambridge University Press: 24 October 2008
Extract
Let H be a complex Hilbert space. Recall that a bounded linear operator A, on H, is positive if (Ax, x) ≥ 0 (x ∈ H) (so that A = A* necessarily) and positive definite if A is positive and invertible.
- Type
- Research Article
- Information
- Mathematical Proceedings of the Cambridge Philosophical Society , Volume 76 , Issue 2 , September 1974 , pp. 415 - 416
- Copyright
- Copyright © Cambridge Philosophical Society 1974
References
REFERENCES
(3)Kaplansky, IrvingTopological algebra. University of Chicago Mimeographed Lecture Notes, Chicago, III. (1952).Google Scholar
(6)Wigner, E. P.On weakly positive matrices. Canad. J. Math. 15 (1963), 313–318.CrossRefGoogle Scholar
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