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<b>let </b><font color="Maroon">c<sub>1</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/>

<a NAME="E1:74"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R1">=</a>  <a href="afinsq_1.html#K4" target="_self">&lt;%&gt;</a> <font color="Maroon">c<sub>1</sub></font>
 
;<br/>
<b>hence </b><a NAME="E2:74"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>1</sub></font> <a href="afinsq_1.html#K10" target="_self">^omega</a> 
 <b>by </b><i><a class="ref" href="afinsq_1.html#D8" target="_self">Def8</a></i>;<br/>


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