: Controlling Precision, Error Handling etc">Policy</a> template argument: the
              default behavior is to throw a <span class="emphasis"><em>boost::math::evaluation_error</em></span>.
              If the <a class="link" href="../../policy.html" title="Chapter&#160;18.&#160;Policies: Controlling Precision, Error Handling etc">Policy</a> is changed to not throw
              then it returns <span class="emphasis"><em>std::pair&lt;T&gt;(min, min)</em></span>.
            </p></dd>
<dt><span class="t