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<a NAME="E1:18_1_1"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T2">XBOOLE_1:2</a></i>;<br/>
<b>hence </b><a NAME="E2:18_1_1"/>
not  <a href="finsub_1.html#K5" target="_self">Fin</a> <font color="Maroon">A</font> is <a href="xboole_0.html#V1">empty</a>
 <b>by </b><i><a class="ref" href="finsub_1.html#D3" target="_self">Def3</a></i>;<br/>


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