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

<a NAME="E1:60_1_1"/>
 <a href="roughs_1.html#K3" target="_self">LAp</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K1">{}</a> <font color="Maroon">A</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:60_1_1"/>
not  <a href="pre_topc.html#K1">{}</a> <font color="Maroon">A</font> is <a href="roughs_1.html#V4" target="_self">rough</a>
 <b>by </b><i/>;<br/>


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