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<div><span class="kw">theorem </span><a NAME="T7"><span class="comment"><font color="firebrick">:: XBOOLE_0:7</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>   st <font color="Olive" title="b1">X</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  holds <br/> ex <font color="Olive" title="b2">x</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">object</a>  st <font color="Olive" title="b2">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Olive" title="b1">X</font> <span class="kw">by</span> <span class="lab"><a class="ref" href="xboole_0.html#D1" target="_self" onmouseover="rs('xboole_0/D1')" onmouseout="rh()">Def1</a>, <a class="txt" href="xboole_0.html#E13"><span class="lab"><font color="Green" title="E6">Lm1</font></span></a></span>;<br/></div></div>
