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

<b>thus </b><a NAME="E1:14"/>
for <font color="Olive">a</font> being  <a href="finseq_1.html#NM1">FinSequence</a>  st <font color="Olive">a</font> <a href="hidden.html#R2">in</a>  <a href="xboole_0.html#K1">{}</a>  holds <br/> <a href="relat_1.html#K2">rng</a> <font color="Olive">a</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="margrel1.html#D6" target="_self">MARGREL1:def 6</a><br/>


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