__Random:__double**gsl_ran_laplace***(const gsl_rng **`r`, double`a`)-
This function returns a random variate from the the Laplace distribution
with width
`a`. The distribution is,for @math{-\infty < x < \infty}.

__Function:__double**gsl_ran_laplace_pdf***(double*`x`, double`a`)-
This function computes the probability density @math{p(x)} at
`x`for a Laplace distribution with mean`a`, using the formula given above.

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