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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E37">Th54</font></span>: <a NAME="T54"><span class="comment"><font color="firebrick">:: CLASSES2:54</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">U1</font>, <font color="Olive" title="b2">U2</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a> holds  <font color="Olive" title="b1">U1</font>,<font color="Olive" title="b2">U2</font> <a href="xboole_0.html#R3" title="XBOOLE_0:pred.3">are_c=-comparable</a> </div></div>
