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THE USE OF MOMENTS IN ESTIMATING THE SPECTRUM.
OFFICE OF NAVAL RESEARCH LONDON (UNITED KINGDOM)
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Error bounds for the eigenvalues and eigenfunctions of a self-adjoint operator A are obtained in terms of Az,z and Az,Az, the first two moments of a probability distribution generated by the trial element z. Lower bounds for certain quantum-mechanical expectation values are also calculated. Recent European contributions are featured. Author
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