public void ValidateDensityLn(double mu, double lambda, double x, double p)
{
var n = new InverseGaussian(mu, lambda);
AssertHelpers.AlmostEqualRelative(p, n.DensityLn(x), precision);
AssertHelpers.AlmostEqualRelative(p, InverseGaussian.PDFLn(mu, lambda, x), precision);
}
