Geodesic
On the factorization of compositions of a countable number of Poisson laws
Sbornik. Mathematics, Tome 28 (1976) no. 2, pp. 153-167 Cet article a éte moissonné depuis la source Math-Net.Ru

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For the class of infinitely divisible distributions with characteristic function of the form \begin{equation*} \varphi(t,F)=\exp\biggl\{i\beta t+\int_{R^1}(e^{itx}-1)\nu\,\{dx\}\biggr\}, \tag{a} \end{equation*} where $\nu$ is a finite measure concentrated on the positive rationals, and such that for some positive $K$ we have \begin{equation*} \int_{|x|>y}\nu\,\{dx\}=O\bigl\{\exp(-Ky^2)\bigr\},\qquad y\to+\infty, \tag{b} \end{equation*} we obtain necessary and sufficient conditions for membership in the class $I_0$ introduced by Yu. V. Linnik. These results generalize a theorem of Paul Lévy, which required finiteness of the Poisson spectrum in place of (b). The proof given here is much simpler than Lévy's. Bibliography: 13 titles. 
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A. E. Fryntov. On the factorization of compositions of a countable number of Poisson laws. Sbornik. Mathematics, Tome 28 (1976) no. 2, pp. 153-167. http://geodesic.mathdoc.fr/item/SM_1976_28_2_a2/

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