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

<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="struct_0.html#NM2">Subset</a> of <a href="topmetr.html#K3">R^1</a> ;<br/>

<b>assume </b><a NAME="E1:87"/><i><font color="Green">E51</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="numbers.html#K1">REAL</a> 
 ;<br/>

<a NAME="E2:87"/><b>then </b>
 <a href="tops_1.html#K1">Int</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="tops_1.html#T43">TOPS_1:43</a>, <a class="ref" href="borsuk_5.html#T13">BORSUK_5:13</a></i>;<br/>
<b>hence </b><a NAME="E3:87"/>
not <font color="Maroon">c<sub>1</sub></font> is <a href="tops_1.html#V2">boundary</a>
 <b>by </b><i><a class="txt" href="topgen_1.html#E1:87"><i><font color="Green">E51</font></i></a>, <a class="ref" href="tops_3.html#D1">TOPS_3:def 1</a></i>;<br/>


</div>
