<?xml version="1.0"?>
<div class="add">

<a NAME="E1:36_1_1"/>
 <a href="trees_3.html#K1" title="TREES_3:func.1">Trees</a>  is <a href="trees_3.html#V1" title="TREES_3:attr.1">constituted-Trees</a>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="36_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c1">x</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="trees_3.html#D3" target="_self" title="TREES_3:def.3">TREES_3:def 3</a><br/>

<b>thus </b><a NAME="E1:36_1_1_1"/>
( <font color="Maroon" title="c1">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="trees_3.html#K1" title="TREES_3:func.1">Trees</a>  implies <font color="Maroon" title="c1">x</font> is   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a> )
 <b>by </b><i><a class="ref" href="trees_3.html#D1" target="_self" title="TREES_3:def.1">Def1</a></i>;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E2:36_1_1"/>
 <a href="trees_3.html#K1" title="TREES_3:func.1">Trees</a>  is <a href="trees_3.html#V1" title="TREES_3:attr.1">constituted-Trees</a>
 ;<br/>


</div>
