roblem"></a></span><a class="link" href="facets_intro.html#math_toolkit.fp_facets.facets_intro.the_problem">The
        Problem</a>
      </h6>
<p>
        The C++98 standard does not specify how <span class="emphasis"><em>infinity</em></span> and
        <span class="emphasis"><em>NaN</em></span> are represented in text streams. As a result, different
        platforms use different string representations. This can cause undefined
        behavior when text files are moved between different platforms. Some