<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T51"><span class="comment"><font color="firebrick">:: TREES_1:51</font></span><br/></a><div class="add"> <a href="trees_1.html#K2" title="TREES_1:func.2">elementary_tree</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="tarski.html#K2" title="TARSKI:func.2">{</a><span class="default"><a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>,<span class="p2"><a href="finseq_1.html#K12" title="FINSEQ_1:func.12">&lt;*</a><span class="default"><a href="numbers.html#K5" title="NUMBERS:func.5">0</a></span><a href="finseq_1.html#K12" title="FINSEQ_1:func.12">*&gt;</a></span></span><a href="tarski.html#K2" title="TARSKI:func.2">}</a></span></div></div>
