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<b>let </b><font color="Maroon">i</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">D</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">D'</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">E</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">d'</font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">D'</font>;<br/><b>let </b><font color="Maroon">F</font> be   <a href="funct_2.html#NM1">Function</a> of <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">D</font>,<font color="Maroon">D'</font></span><a href="zfmisc_1.html#K2">:]</a></span>,<font color="Maroon">E</font>;<br/><b>let </b><font color="Maroon">z</font> be    <a href="finseq_2.html#M2" target="_self">Element</a> of <font color="Maroon">i</font> <a href="finseq_2.html#K4" target="_self">-tuples_on</a> <font color="Maroon">D</font>;<br/>













<b>reconsider </b><font color="Maroon">r</font> = <font color="Maroon">F</font> <a href="funcop_1.html#K4">[:]</a> <font color="Maroon">z</font>,<font color="Maroon">d'</font> as    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">E</font> <b>by </b><i/>;<br/>
<a NAME="E2:142"/>
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">z</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font>
 
<b>by </b><i/>;<br/>
<a NAME="E3:142"/><b>then </b>
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">r</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:142"/>
<font color="Maroon">F</font> <a href="funcop_1.html#K4">[:]</a> <font color="Maroon">z</font>,<font color="Maroon">d'</font> is    <a href="finseq_2.html#M2" target="_self">Element</a> of <font color="Maroon">i</font> <a href="finseq_2.html#K4" target="_self">-tuples_on</a> <font color="Maroon">E</font>
 <b>by </b><i/>;<br/>


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