></span> and with the <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf" target="_top">Draft
      Technical Report on C++ Library Extensions, 2005-06-24, section 5.2.1, paragraph
      6</a>:
    </p>
<div class="blockquote"><blockquote class="blockquote"><p>
        <span class="emphasis"><em>"Each of the functions declared above shall return a NaN (Not
        a Number) if any argument value is a NaN, but it shall not report a domain
        error. Otherwise, each of the function