red at delta, when &#948; / (4 * &#957;) &lt;
            epsilon for the floating-point type in use. <a href="https://svn.boost.org/trac/boost/ticket/7259" target="_top">#7259</a>.
            It was found that the incomplete beta was suffering from serious cancellation
            errors when degrees of freedom was very large. (That has now been fixed
            in our code, but any code based on Didonato and Morris's original papers
            (probably every implementation out there actually) will hav