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<b>let </b><font color="Maroon" title="c1">M</font> be   <a href="midsp_1.html#NM1" title="MIDSP_1:NM.1">MidSp</a>;<br/><b>let </b><font color="Maroon" title="c2">u</font> be    <a href="midsp_1.html#M1" title="MIDSP_1:mode.1">Vector</a> of <font color="Maroon" title="c1">M</font>;<br/>



<b>consider </b><font color="Maroon" title="c3">a</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">M</font>;<br/>
<b>consider </b><font color="Maroon" title="c4">b</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">M</font><b> such that </b><br/><a NAME="E3:55"/><i><font color="Green" title="E41">A1</font></i>: 
<font color="Maroon" title="c2">u</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="midsp_1.html#K11" title="MIDSP_1:func.11">vect</a> <font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T55" target="_self" title="MIDSP_1:th.55">Th55</a></i>;<br/>
<font color="Maroon" title="c2">u</font> <a href="midsp_1.html#K10" title="MIDSP_1:func.10">+</a> <span class="p1">(<span class="default"><a href="midsp_1.html#K9" title="MIDSP_1:func.9">ID</a> <font color="Maroon" title="c1">M</font></span>)</span> = 
<span class="p1">(<span class="default"><a href="midsp_1.html#K11" title="MIDSP_1:func.11">vect</a> <font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font></span>)</span> <a href="midsp_1.html#K10" title="MIDSP_1:func.10">+</a> <span class="p1">(<span class="default"><a href="midsp_1.html#K11" title="MIDSP_1:func.11">vect</a> <font color="Maroon" title="c4">b</font>,<font color="Maroon" title="c4">b</font></span>)</span>
<b>by </b><i><a class="txt" href="midsp_1.html#E3:55"><i><font color="Green" title="E41">A1</font></i></a>, <a class="ref" href="midsp_1.html#T58" target="_self" title="MIDSP_1:th.58">Th58</a></i>
<br/>.= 
<font color="Maroon" title="c2">u</font>
<b>by </b><i><a class="txt" href="midsp_1.html#E3:55"><i><font color="Green" title="E41">A1</font></i></a>, <a class="ref" href="midsp_1.html#T60" target="_self" title="MIDSP_1:th.60">Th60</a></i>
;<br/>
<b>hence </b><a NAME="E5:55"/>
<font color="Maroon" title="c2">u</font> <a href="midsp_1.html#K10" title="MIDSP_1:func.10">+</a> <span class="p1">(<span class="default"><a href="midsp_1.html#K9" title="MIDSP_1:func.9">ID</a> <font color="Maroon" title="c1">M</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">u</font>
 ;<br/>


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