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Criteria for the Unique Determination of Probability Distributions by Moments

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A positive probability law has a density function of the general form Q(x)exp(−x1/L(x)), where Q is subject to growth restrictions, and L is slowly varying at infinity. This law is determined by its moment sequence when < 2, and not determined when > 2. It is still determined when = 2 and L(x) does not tend to zero too quickly. This paper explores the consequences for the induced power and doubled laws, and for mixtures. The proofs couple the Carleman and Krein criteria with elementary comparison arguments.
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Keywords: Carleman and Krein conditions; moment problem

Document Type: Research Article

Affiliations: 1: Department of Mathematics and Statistics, University of Western Australia, 2: Dept of Applied Mathematics, Chinese Culture University, 3: Dept of Statistics, Tamkang University

Publication date: March 1, 2001

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