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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E20">Th26</font></span>: <a NAME="T26"><span class="comment"><font color="firebrick">:: TREES_2:26</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">W</font> being   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a><br/>  for <font color="Olive" title="b2">B</font> being   <a href="trees_2.html#NM3" title="TREES_2:NM.3">Branch</a> of <font color="Olive" title="b1">W</font> holds   <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Olive" title="b2">B</font></div></div>
