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<div><span class="kw">theorem </span><a NAME="T7"><span class="comment"><font color="firebrick">:: ZF_REFLE:7</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">W</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a><br/>  for <font color="Olive" title="b2">x</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds <br/> ( <font color="Olive" title="b2">x</font> is   <a href="ordinal4.html#NM1" title="ORDINAL4:NM.1">Ordinal</a> of <font color="Olive" title="b1">W</font> iff <font color="Olive" title="b2">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="ordinal1.html#K2" title="ORDINAL1:func.2">On</a> <font color="Olive" title="b1">W</font> ) <span class="kw">by</span> <span class="lab"><a class="ref" href="ordinal1.html#D9" onmouseover="rs('ordinal1/D9')" onmouseout="rh()">ORDINAL1:def 9</a></span>;<br/></div></div>
