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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">p</font> be    <a href="finseq_1.html#M2">FinSequence</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  <a href="finseq_1.html#K2">Seg</a> <font color="Maroon">i</font>, <a href="finseq_1.html#K2">Seg</a> <font color="Maroon">i</font>;<br/>







<a NAME="E1:49"/>
( <font color="Maroon">i</font> <a href="hidden.html#R1">=</a> 0 implies <font color="Maroon">i</font> <a href="hidden.html#R1">=</a> 0 )
 
;<br/>
<b>hence </b><a NAME="E2:49"/>
( <font color="Maroon">i</font> <a href="xxreal_0.html#R1">&lt;=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font> implies <font color="Maroon">p</font> <a href="partfun1.html#K1">*</a> <font color="Maroon">f</font> is    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">D</font> )
 <b>by </b><i/>;<br/>


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