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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E15">Lm18</font></span>: <a NAME="T9"><span class="comment"><font color="firebrick">:: HILBERT4:9</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/><font color="Olive" title="b1">x</font> <a href="hilbert4.html#K5" title="HILBERT4:func.5">tohilb</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="partfun1.html#K6" title="PARTFUN1:func.6">id</a> 1</div></div>
