private void DefineRandomGenerator()
{
_gamma1 = new GammaDistribution(_alpha1, 1.0);
_gamma2 = new GammaDistribution(_alpha2, 1.0);
}
/// Assigns new values to the parameters.
/// This method assumes that the parameters have been already checked.
private void DefineParameters(double shape1, double shape2)
{
_alpha1 = shape1;
_alpha2 = shape2;
_norm = GammaFunction.LogBeta(_alpha1, _alpha2);
_gamma1 = null;
_gamma2 = null;
_incompleteBetaFunction = null;
}