__Random:__double**gsl_ran_levy***(const gsl_rng **`r`, double`c`, double`alpha`)-
This function returns a random variate from the Levy symmetric stable
distribution with scale
`c`and exponent`alpha`. The symmetric stable probability distribution is defined by a fourier transform,There is no explicit solution for the form of @math{p(x)} and the library does not define a corresponding

`pdf`

function. For @math{\alpha = 1} the distribution reduces to the Cauchy distribution. For @math{\alpha = 2} it is a Gaussian distribution with @c{$\sigma = \sqrt{2} c$} @math{\sigma = \sqrt{2} c}. For @math{\alpha < 1} the tails of the distribution become extremely wide.The algorithm only works for @c{$0 < \alpha \le 2$} @math{0 < alpha <= 2}.

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