<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E10">Th2</font></span>: <a NAME="T2"><span class="comment"><font color="firebrick">:: STACKS_1:2</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   non  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>   non  <a href="struct_0.html#V11" title="STRUCT_0:attr.11">void</a>   <a href="stacks_1.html#L1" title="STACKS_1:struct.1">StackSystem</a>   st <font color="Olive" title="b1">X</font> is  <a href="stacks_1.html#V2" title="STACKS_1:attr.2">pop-finite</a>  holds <br/> ex <font color="Olive" title="b2">s</font> being   <a href="stacks_1.html#NM2" title="STACKS_1:NM.2">stack</a> of <font color="Olive" title="b1">X</font> st  <a href="stacks_1.html#R1" title="STACKS_1:pred.1">emp</a> <font color="Olive" title="b2">s</font></div></div>
