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- W4386875737 abstract "The gamma difference distribution is defined as the difference of two gamma distributions, with in general different shape and rate parameters. Starting with knowledge of the corresponding characteristic function, a second order linear differential equation characterisation of the probability density function is given. This is used to derive a Stein-type differential identity relating to the expectation with respect to the gamma difference distribution of a general twice differentiable function $g(x)$. Choosing $g(x) = x^k$ gives a second order recurrence for the positive integer moments, which are also shown to permit evaluations in terms of ${}_2 F_1$ hypergeometric polynomials. A hypergeometric function evaluation is given for the absolute continuous moments. Specialising the gamma difference distribution gives the variance gamma distribution. Results of the type obtained herein have previously been obtained for this distribution, allowing for comparisons to be made." @default.
- W4386875737 created "2023-09-20" @default.
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- W4386875737 date "2023-09-18" @default.
- W4386875737 modified "2023-09-27" @default.
- W4386875737 title "On the gamma difference distribution" @default.
- W4386875737 doi "https://doi.org/10.48550/arxiv.2309.09516" @default.
- W4386875737 hasPublicationYear "2023" @default.
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