em>continuous</em></span>
        unlike its numeric set.
      </p>
<p>
        This definition was chosen because:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <span class="bold"><strong>(a)</strong></span> The discrete set of numeric values
            is already given by the numeric set.
          </li>
<li class="listitem">
            <span class="bold"><strong>(b)</strong></span> Abstract intervals are easier to
     