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

<a NAME="E1:80"/>
<a href="numbers.html#K1">REAL</a>  <a href="subset_1.html#K6">\</a> <a href="borsuk_5.html#K1">IRRAT</a>  <a href="hidden.html#R1">=</a> <a href="numbers.html#K1">REAL</a>  <a href="xboole_0.html#K3">/\</a> <a href="numbers.html#K3">RAT</a> 
 
<b>by </b><i><a class="ref" href="xboole_1.html#T48">XBOOLE_1:48</a>, <a class="ref" href="borsuk_5.html#D3">BORSUK_5:def 3</a></i>;<br/>
<b>hence </b><a NAME="E2:80"/>
 <a href="numbers.html#K3">RAT</a>  <a href="hidden.html#R1">=</a> <a href="numbers.html#K1">REAL</a>  <a href="subset_1.html#K6">\</a> <a href="borsuk_5.html#K1">IRRAT</a> 
 <b>by </b><i><a class="ref" href="numbers.html#T12">NUMBERS:12</a>, <a class="ref" href="xboole_1.html#T28">XBOOLE_1:28</a></i>;<br/>


</div>
