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

<b>let </b><font color="Maroon">A</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">B</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">Y</font> be    <a href="hidden.html#M1">set</a> ;<br/>







<b>assume </b><b>that </b><br/><a NAME="E1:63"/><i><font color="Green">E13</font></i>: 
<font color="Maroon">A</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font>
 <b>and </b><br/><a NAME="E2:63"/><i><font color="Green">E14</font></i>: 
<font color="Maroon">B</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">Y</font>
 <b>and </b><br/><a NAME="E3:63"/><i><font color="Green">E22</font></i>: 
<font color="Maroon">X</font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">Y</font>
 ;<br/>

<a NAME="E4:63"/>
<font color="Maroon">A</font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">Y</font>
 
<b>by </b><i><a class="txt" href="xboole_1.html#E36"><i><font color="Green">Lemma34</font></i></a>, <a class="ref" href="xboole_1.html#T39" target="_self">Th39</a>, <a class="ref" href="xboole_1.html#T34" target="_self">Th34</a></i>;<br/>
<b>hence </b><a NAME="E5:63"/>
<font color="Maroon">A</font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">B</font>
 <b>by </b><i><a class="ref" href="xboole_1.html#T36" target="_self">Th36</a>, <a class="ref" href="xboole_1.html#T34" target="_self">Th34</a></i>;<br/>


</div>
