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

<font color="Maroon" title="c1">S</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span> = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span></span>)</span> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a> 
<span class="kw">by</span> <span class="lab"><a class="ref" href="relat_1.html#T23" onmouseover="rs('relat_1/T23')" onmouseout="rh()">RELAT_1:23</a></span>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span></span>)</span> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a> 

;<br/>
<span class="kw">hence </span><a NAME="E2:23_1_1"/>
<font color="Maroon" title="c1">S</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">S</font> <a href="relat_1.html#K2" title="RELAT_1:func.2">~</a></span>)</span> is  <a href="relat_2.html#V3" title="RELAT_2:attr.3">symmetric</a> 
 <span class="kw">by</span> <span class="lab"><a class="ref" href="relat_2.html#T13" onmouseover="rs('relat_2/T13')" onmouseout="rh()">RELAT_2:13</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


</div>
