%feature("docstring") OT::FrankCopulaFactory
"Frank Copula factory.

Available constructor:
    FrankCopulaFactory()

The paramters are estimated using the follwing equations:

:math:`\Hat{\theta}_n` is solution of

.. math::

    \displaystyle \Hat{\tau}_n = 1-4\left( \frac{1-D(\Hat{\theta}_n, 1)^{\strut}}{\theta} \right)

where :math:`D` is the Debye function defined as

.. math::

    \displaystyle D(x, n)=\frac{n}{x^n}\int_0^x \frac{t^n}{e^t-1_{\strut}} dt

See also
--------
DistributionFactory, FrankCopula"
