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<b>consider </b><font color="Maroon">f</font> being  non <a href="xboole_0.html#V1">empty</a> <a href="relat_1.html#V2">with_zero</a>  <a href="finseq_1.html#M2">FinSequence</a> of  <a href="numbers.html#K5">NAT</a> ;<br/>
<b>consider </b><font color="Maroon">D</font> being  <a href="freealg.html#V1" target="_self">missing_with_Nat</a>  <a href="hidden.html#M1">set</a> ;<br/>
<b>take </b>
 <a href="freealg.html#K15" target="_self">FreeUnivAlgZAO</a> <font color="Maroon">f</font>,<font color="Maroon">D</font>
;<br/>

<b>thus </b><a NAME="E3:47_1_1"/>
(  <a href="freealg.html#K15" target="_self">FreeUnivAlgZAO</a> <font color="Maroon">f</font>,<font color="Maroon">D</font> is <a href="unialg_1.html#V3">strict</a> &amp;  <a href="freealg.html#K15" target="_self">FreeUnivAlgZAO</a> <font color="Maroon">f</font>,<font color="Maroon">D</font> is <a href="freealg.html#V3" target="_self">free</a> &amp;  <a href="freealg.html#K15" target="_self">FreeUnivAlgZAO</a> <font color="Maroon">f</font>,<font color="Maroon">D</font> is <a href="unialg_2.html#V2">with_const_op</a> )
 <b>by </b><i/>;<br/>


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