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<div>:: <span class="kw">deftheorem </span>   defines <a href="ordinal4.html#K3" title="ORDINAL4:func.3">1-element_of</a> <a onclick="hs(this)" href="javascript:()">ORDINAL4:def 3 : <br/></a><span> for <font color="Olive" title="b1">W</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a> holds   <a href="ordinal4.html#K3" title="ORDINAL4:func.3">1-element_of</a> <font color="Olive" title="b1">W</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1;<br/></span></div>
