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<div><span class="kw">theorem </span><a NAME="T91"><span class="comment"><font color="firebrick">:: CLASSES5:91</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">U</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a><br/>  for <font color="Olive" title="b2">C</font>, <font color="Olive" title="b3">D</font> being   <a href="classes5.html#NM3" title="CLASSES5:NM.3">CategorySet</a>  st <font color="Olive" title="b2">C</font> is <font color="Olive" title="b1">U</font> <a href="classes5.html#V2" title="CLASSES5:attr.2">-set</a>  &amp; <font color="Olive" title="b3">D</font> is <font color="Olive" title="b1">U</font> <a href="classes5.html#V2" title="CLASSES5:attr.2">-set</a>  holds <br/> <a href="classes5.html#K22" title="CLASSES5:func.22">Functors</a> (<font color="Olive" title="b2">C</font>,<font color="Olive" title="b3">D</font>) is <font color="Olive" title="b1">U</font> <a href="classes5.html#V2" title="CLASSES5:attr.2">-set</a> </div></div>
