re the result is mathematically
      undefined or indeterminate, but there is none the less a convention for what
      the result should be: for example the C99 standard specifies that the result
      of 0<sup>0</sup> is 1, even though the result is actually mathematically indeterminate.
    </p>
<h4>
<a name="math_toolkit.error_handling.h10"></a>
      <span class="phrase"><a name="math_toolkit.error_handling.rounding_error"></a></span><a class="link" href="error_handling.html#math_toolkit.error_handlin