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<b>let </b><font color="Maroon">F</font> be   <a href="finseq_1.html#NM1">FinSequence</a>;<br/>

<b>assume </b><a NAME="E1:98_1_1"/>
<font color="Maroon">F</font> is <a href="xboole_0.html#V1">empty</a>
 ;<br/>

<a NAME="E2:98_1_1"/><b>then </b>
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="relat_1.html#T60">RELAT_1:60</a></i>;<br/>
<a NAME="E3:98_1_1"/><b>then </b>
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">F</font> <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K2">COMPLEX</a> 
 
<b>by </b><i><a class="ref" href="xboole_1.html#T2">XBOOLE_1:2</a></i>;<br/>
<b>hence </b><a NAME="E4:98_1_1"/>
<font color="Maroon">F</font> is <a href="rvsum_1.html#V1" target="_self">complex-yielding</a>
 <b>by </b><i><a class="ref" href="rvsum_1.html#T23" target="_self">Th23</a></i>;<br/>


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