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<a NAME="E1:34_1_1"/>
<font color="Maroon">C</font>,<font color="Maroon">C</font> <a href="yellow18.html#K1" target="_self">opp</a>  <a href="yellow18.html#R2" target="_self">are_opposite</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:34_1_1"/>
<font color="Maroon">C</font> <a href="yellow18.html#K1" target="_self">opp</a>  is <a href="altcat_1.html#V11">associative</a>
 <b>by </b><i/>;<br/>


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