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

<a NAME="E1:22_1_1"/>
<font color="Maroon">M</font> <a href="hidden.html#R1">=</a>  <a href="pre_topc.html#K1">{}</a> <font color="Maroon">X</font>
 
;<br/>
<b>hence </b><a NAME="E2:22_1_1"/>
 <a href="convex1.html#K3">conv</a> <font color="Maroon">M</font> is <a href="xboole_0.html#V1">empty</a>
 <b>by </b><i/>;<br/>


</div>
