Small eigenvalues of large Hankel matrices:The indeterminate case
Christian Berg, Yang Chen, Mourad E. H. Ismail
Abstract
In this paper we characterise the indeterminate case by the eigenvalues of the Hankel matrices being bounded below by a strictly positive constant. An explicit lower bound is given in terms of the orthonormal polynomials and we find expresions for this lower bound in a number of indeterminate moment problems.
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