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Stability of the method of least squares for finding the eigenvalues of a symmetric operator. (English) Zbl 0207.13602
MSC:
46A16 Not locally convex spaces (metrizable topological linear spaces, locally bounded spaces, quasi-Banach spaces, etc.)
47B25 Linear symmetric and selfadjoint operators (unbounded)
47A75 Eigenvalue problems for linear operators
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