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Published 1998 | public
Journal Article

Measurable enumeration of eigenelements

Abstract

We prove that for eigenelements of a measurable family of linear self-adjoint operators in a separable Hilbert space there exists a measurable enumeration. We also prove a similar result for measurable families of bounded linear operators having at most countably many eigenvalues (under certain restrictions on the parameter space). The proof of the latter result is based on descriptive set theory, while in the case of self-adjoint (and some more general) operators the proof is constructive.

Additional Information

© 1999 OPA (Overseas Publishers Association) N. V. Published by license under the Gordon and Breach Science Publishers imprint. Received: 5 1998; Published online: 20 Jan 2011. Research partially supported by NSF Grant DMS 96-19880. We are indebted to S. Jitomirskaya, Y. Last, C. Remling, and B. Simon for useful discussions. The first named author is grateful for the hospitality of the Division of Physics, Mathematics and Astronomy of Caltech and the Department of Mathematics of the University of California at Irvine, where parts of this work were done.

Additional details

Created:
August 22, 2023
Modified:
March 5, 2024