Mathematics – Probability
Scientific paper
2010-05-14
Mathematics
Probability
24 pages, 7 figures, 1 table
Scientific paper
We present a method for computing the PDF and CDF of a non-negative infinitely divisible random variable $X$. Our method uses the L\'{e}vy-Khintchine representation of the Laplace transform $\mathbb{E} e^{-\lambda X} = e^{-\phi(\lambda)}$, where $\phi$ is the Laplace exponent. We apply the Post-Widder method for Laplace transform inversion combined with a sequence convergence accelerator to obtain accurate results. We demonstrate this technique on several examples including the stable distribution, mixtures thereof, and integrals with respect to non-negative L\'{e}vy processes. Software to implement this method is available from the authors and we illustrate its use at the end of the paper.
Taqqu Murad S.
Veillette Mark S.
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