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<div><span class="kw">theorem </span><a NAME="T22"><span class="comment"><font color="firebrick">:: SETFAM_1:22</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">SFX</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="setfam_1.html#K4" title="SETFAM_1:func.4">DIFFERENCE</a> (<font color="Olive" title="b1">SFX</font>,<font color="Olive" title="b1">SFX</font>) <a href="setfam_1.html#R1" title="SETFAM_1:pred.1">is_finer_than</a> <font color="Olive" title="b1">SFX</font></div></div>
