| 11. | We define that any discrete random variable Y satisfying probability generating function characterization
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| 12. | The generating function of the coefficients a _ n is then
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| 13. | The result is that all generating functions involved have the form
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| 14. | All higher characteristic function and moment generating function are both equal to one.
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| 15. | In consequence the moment generating function is not defined.
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| 16. | Similar asymptotic analysis is possible for exponential generating functions.
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| 17. | The generating function given above for is a special case of this formula.
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| 18. | So, let's try to find the solution using generating functions.
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| 19. | It can be characterized by its moment generating function:
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| 20. | The Cauchy distribution has no moment generating function.
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