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<div><span class="kw">theorem </span><a NAME="T51"><span class="comment"><font color="firebrick">:: CLASSES1:51</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   <a href="classes1.html#K5" title="CLASSES1:func.5">the_transitive-closure_of</a> <font color="Olive" title="b1">X</font> is  <a href="ordinal1.html#V1" title="ORDINAL1:attr.1">epsilon-transitive</a>  ;<br/></div></div>
