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<b>let </b><font color="Maroon">T</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="struct_0.html#L1">1-sorted</a> ;<br/><b>let </b><font color="Maroon">S</font> be   <a href="normsp_1.html#NM2">sequence</a> of <font color="Maroon">T</font>;<br/>



<a NAME="E1:11"/>
 ex <font color="Olive">NS</font> being <a href="seqm_3.html#V1">increasing</a> <a href="seqm_3.html#NM1">Seq_of_Nat</a> st <font color="Maroon">S</font> <a href="hidden.html#R1">=</a> <font color="Maroon">S</font> <a href="partfun1.html#K1">*</a> <font color="Olive">NS</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:11"/>
<font color="Maroon">S</font> is    <a href="bhsp_3.html#M1">subsequence</a> of <font color="Maroon">S</font>
 <b>by </b><i><a class="ref" href="bhsp_3.html#D4">BHSP_3:def 4</a></i>;<br/>


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