<?xml version="1.0"?>
<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> ;<br/>

<b>assume </b><a NAME="E1:29_1_1"/>
<font color="Maroon" title="c1">X</font> is <a href="trees_3.html#V2" title="TREES_3:attr.2">constituted-FinTrees</a>
 ;<br/>

<b>hence </b><a NAME="E2:29_1_1"/>
for <font color="Olive" title="b1">x</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">X</font> holds <br/><font color="Olive" title="b1">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#D4" target="_self" title="TREES_3:def.4">Def4</a></i>; <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/>


</div>
