


The Rayleigh Tail Distribution
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.. function:: gsl_ran_rayleigh_tail(a, sigma)

 This function returns a random variate from the tail of the Rayleigh
 distribution with scale parameter ``sigma`` and a lower limit of
 ``a``. The distribution is,

 .. math::
   p(x) dx = {x \over \sigma^2} \exp ((a^2 - x^2) /(2 \sigma^2)) dx

 for :math:`x > a`.

.. function:: gsl_ran_rayleigh_tail_pdf(x, a, sigma)

 This function computes the probability density :math:`p(x)` at :math:`x` for a
 Rayleigh tail distribution with scale parameter ``sigma`` and lower
 limit ``a``, using the formula given above.
