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Short Communications

On the moments of distributions attracted to stable laws

V. V. Petrov

Leningrad

Abstract: The following theorem is proved. Let the distribution function $F(x)$ belong to the domain of the normal attraction of a stable law with exponent $\alpha$, $0<\alpha<2$. If $\delta>0$ and $\psi(x)$ is an even function which is positive and nondecreasing on the half-line $x\ge\delta$, then convergence of the integral $\int_\delta^\infty\frac{dx}{x\psi(x)}$ is equivalent to convergence of the integral $\int_{|x|\ge\delta}\frac{|x|^\alpha\,dF(x)}{\psi(x)}$.

Received: 24.01.1972

 English version: Theory of Probability and its Applications, 1974, 18:3, 569–571

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