<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E245">Th13</font></span>: <a NAME="T348"><span class="comment"><font color="firebrick">:: GROUP_1A:348</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">G</font> being   <a href="group_1a.html#NM1" title="GROUP_1A:NM.1">addGroup</a> holds  <span class="p1">(<span class="default"><a href="group_1a.html#K3" title="GROUP_1A:func.3">add_inverse</a> <font color="Olive" title="b1">G</font></span>)</span> <a href="funct_2.html#K2" title="FUNCT_2:func.2">"</a>  <a href="funct_2.html#R2" title="FUNCT_2:pred.2">=</a>  <a href="group_1a.html#K3" title="GROUP_1A:func.3">add_inverse</a> <font color="Olive" title="b1">G</font></div></div>
