div></div>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Intersection
                </p>
                </th>
<th>
                <p>
                  interval<br> type
                </p>
                </th>
<th>
                <p>
                  interval<br> sets
                </p>
                </th>
<th>
                <p>
                  interval<br> maps
             