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Remarks on converse Carleman and Krein criteria for the classical moment problem

Published online by Cambridge University Press:  09 April 2009

Anthony G. Pakes
Affiliation:
Department of Mathematics and Statistics University of Western Australia35 Stirling Highway, WA 6009Australia e-mail: pakes@maths.uwa.edu.au
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Abstract

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The key theme is converse forms of criteria for deciding determinateness in the classical moment problem. A method of proof due to Koosis is streamlined and generalized giving a convexity condition under which moments satisfying implies that c a positive constant. A contrapositive version is proved under a rapid variation condition on f (x), generalizing a result of Lin. These results are used to obtain converses of the Stieltjes versions of the Carleman and Krein criteria. Hamburger versions are obtained which relax the symmetry assumption of Koosis and Lin, respectively. A sufficient condition for Stieltjes determinateness of a discrete law is given in terms of its mass function. These criteria are illustrated through several examples.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2001

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