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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E12">Th18</font></span>: <a NAME="T18"><span class="comment"><font color="firebrick">:: ORDINAL6:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds <br/> (  <a href="relat_1.html#NK1" title="RELAT_1:NK.1">dom</a> <span class="p1">(<span class="default"><a href="ordinal6.html#K2" title="ORDINAL6:func.2">numbering</a> <font color="Olive" title="b1">X</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="ordinal6.html#K1" title="ORDINAL6:func.1">ord-type</a> <font color="Olive" title="b1">X</font> &amp;  <a href="xtuple_0.html#K10" title="XTUPLE_0:func.10">rng</a> <span class="p1">(<span class="default"><a href="ordinal6.html#K2" title="ORDINAL6:func.2">numbering</a> <font color="Olive" title="b1">X</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="ordinal1.html#K2" title="ORDINAL1:func.2">On</a> <font color="Olive" title="b1">X</font> )</div></div>
