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<b>let </b><font color="Maroon">X</font> be   <a href="subset_1.html#NM2">Subset</a> of <a href="cqc_lang.html#K7">CQC-WFF</a> ;<br/>

<b>set </b><font color="Maroon">f</font> =  <a href="xboole_0.html#K1">{}</a> ;<br/>
<b>reconsider </b><font color="Maroon">f</font> =  <a href="xboole_0.html#K1">{}</a>  as    <a href="finseq_1.html#M2">FinSequence</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a>  <b>by </b><i><a class="ref" href="finseq_1.html#T29">FINSEQ_1:29</a></i>;<br/>
<a NAME="E2:28"/><i><font color="Green">E54</font></i>: 
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">f</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font>
 
<b>by </b><i><a class="ref" href="relat_1.html#T60">RELAT_1:60</a>, <a class="ref" href="xboole_1.html#T2">XBOOLE_1:2</a></i>;<br/>
<a NAME="E3:28"/>
 <a href="calcul_1.html#R4">|-</a> <font color="Maroon">f</font> <a href="finseq_1.html#K8">^</a> <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><a href="cqc_lang.html#K9">VERUM</a> </span><a href="finseq_1.html#K12">*&gt;</a></span>
 
<b>by </b><i><a class="ref" href="henmodel.html#T15">HENMODEL:15</a></i>;<br/>
<b>hence </b><a NAME="E4:28"/>
<font color="Maroon">X</font> <a href="henmodel.html#R1">|-</a>  <a href="cqc_lang.html#K9">VERUM</a> 
 <b>by </b><i>, <a class="ref" href="henmodel.html#D2">HENMODEL:def 2</a></i>;<br/>


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