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<b>take </b>
 <a href="pre_topc.html#K1">{}</a> <font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>thus </b><a NAME="E1:18_1_1"/>
(  <a href="pre_topc.html#K1">{}</a> <font color="Maroon">c<sub>1</sub></font> is <a href="waybel11.html#V3" target="_self">property(S)</a> &amp;  <a href="pre_topc.html#K1">{}</a> <font color="Maroon">c<sub>1</sub></font> is <a href="waybel11.html#V2" target="_self">closed_under_directed_sups</a> )
 ;<br/>


</div>
