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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E11">Th9</font></span>: <a NAME="T9"><span class="comment"><font color="firebrick">:: OSALG_4:9</font></span><br/></a><div class="add"> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  is   <a href="eqrel_1.html#NM2" title="EQREL_1:NM.2">Equivalence_Relation</a> of <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> <span class="kw">by</span> <span class="lab"><a class="ref" href="relset_1.html#T12" onmouseover="rs('relset_1/T12')" onmouseout="rh()">RELSET_1:12</a></span>;<br/></div></div>
