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<b>take </b>
 <a href="subset_1.html#K2" title="SUBSET_1:func.2">[#]</a> <font color="Maroon" title="c1">X</font>
;<br/>

<b>thus </b><a NAME="E1:6_1_1"/>
not  <a href="subset_1.html#K2" title="SUBSET_1:func.2">[#]</a> <font color="Maroon" title="c1">X</font> is <a href="realset1.html#V1" title="REALSET1:attr.1">trivial</a>
 ;<br/>


</div>
