<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T71"><span class="comment"><font color="firebrick">:: TREES_3:71</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T1</font>, <font color="Olive" title="b2">T2</font> being   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a> holds   <a href="trees_1.html#K2" title="TREES_1:func.2">elementary_tree</a> 2 <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="trees_3.html#K13" title="TREES_3:func.13">tree</a> (<font color="Olive" title="b1">T1</font>,<font color="Olive" title="b2">T2</font>)</div></div>
