></span>
      </p>
<p>
        A numeric set is discrete. It has a <span class="bold"><strong>size</strong></span>
        which is the number of numeric values in the set, a <span class="bold"><strong>width</strong></span>
        which is the abstract difference between the highest and lowest boundary
        values: <code class="computeroutput"><span class="special">[</span><span class="identifier">abt</span><span class="special">(</span><span class="identifier">h</span><span class="special">)-</span><s