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<a NAME="E1:36_1_1"/><i><font color="Green">E21</font></i>: 
<span class="p1"><a href="altcat_1.html#K1">&lt;^</a><span class="default"><font color="Maroon">o</font>,<font color="Maroon">o</font></span><a href="altcat_1.html#K1">^&gt;</a></span> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="altcat_1.html#T23">ALTCAT_1:23</a></i>;<br/>
<b>take </b><font color="Maroon">I</font> =  <a href="altcat_1.html#K8">idm</a> <font color="Maroon">o</font>;<br/>

<a NAME="E2:36_1_1"/><i><font color="Green">E22</font></i>: 
( <font color="Maroon">I</font> is <a href="altcat_3.html#V1" target="_self">retraction</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V2" target="_self">coretraction</a> )
 
<b>by </b><i/>;<br/>
<a NAME="E3:36_1_1"/><b>then </b>
( <font color="Maroon">I</font> is <a href="altcat_3.html#V5" target="_self">epi</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V4" target="_self">mono</a> )
 
<b>by </b><i>, <a class="ref" href="altcat_3.html#T1" target="_self">Th1</a>, </i>;<br/>
<b>hence </b><a NAME="E4:36_1_1"/>
( <font color="Maroon">I</font> is <a href="altcat_3.html#V4" target="_self">mono</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V5" target="_self">epi</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V3" target="_self">iso</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V1" target="_self">retraction</a> &amp; <font color="Maroon">I</font> is <a href="altcat_3.html#V2" target="_self">coretraction</a> )
 <b>by </b><i>, , <a class="ref" href="altcat_3.html#D4" target="_self">Def4</a></i>;<br/>


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