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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="nat_1.html#NM1">Nat</a>;<br/>

<a NAME="E1:42"/>
1 <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="nat_1.html#K1">+</a> 1</span>)</span>
 
<b>by </b><i><a class="ref" href="midsp_3.html#T22" target="_self">Th22</a></i>;<br/>
<b>hence </b><a NAME="E2:42"/>
1 is    <a href="midsp_3.html#M1" target="_self">Nat</a> of <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="midsp_3.html#T8" target="_self">Th8</a></i>;<br/>


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