Small eigenvalues of large Hankel matrices : The indeterminate case ∗

  title={Small eigenvalues of large Hankel matrices : The indeterminate case ∗},
  author={Christian Berg and Yang Chen and Mourad E. H. Ismail},
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 expressions for this lower bound in a number of indeterminate moment problems. 
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