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

<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="orders_4.html#V1">countable</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>

<a NAME="E1:78"/><i><font color="Green">E45</font></i>: 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K2">[#]</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="card_1.html#NR1" target="_self">&lt;=`</a>  <a href="card_1.html#K3">alef</a> 0
 
<b>by </b><i><a class="ref" href="card_4.html#D1">CARD_4:def 1</a></i>;<br/>
<a NAME="E2:78"/>
 <a href="topgen_1.html#K4" target="_self">density</a> <font color="Maroon">c<sub>1</sub></font> <a href="card_1.html#NR1" target="_self">&lt;=`</a>  <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K2">[#]</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="topgen_1.html#D12" target="_self">Def12</a></i>;<br/>
<a NAME="E3:78"/><b>then </b>
 <a href="topgen_1.html#K4" target="_self">density</a> <font color="Maroon">c<sub>1</sub></font> <a href="card_1.html#NR1" target="_self">&lt;=`</a>  <a href="card_1.html#K3">alef</a> 0
 
<b>by </b><i><a class="txt" href="topgen_1.html#E1:78"><i><font color="Green">E45</font></i></a>, <a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<b>hence </b><a NAME="E4:78"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="topgen_1.html#V7" target="_self">separable</a>
 <b>by </b><i><a class="ref" href="topgen_1.html#D13" target="_self">Def13</a></i>;<br/>


</div>
