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<b>let </b><font color="Maroon">PS</font> be   <a href="parsp_1.html#NM2">ParSp</a>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">PS</font>;<br/><b>let </b><font color="Maroon">b</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">PS</font>;<br/><b>let </b><font color="Maroon">c</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">PS</font>;<br/><b>let </b><font color="Maroon">d</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">PS</font>;<br/>









<b>assume </b><a NAME="E1:49"/>
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">c</font>,<font color="Maroon">d</font>
 ;<br/>

<a NAME="E2:49"/><b>then </b>
<font color="Maroon">c</font>,<font color="Maroon">d</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 
<b>by </b><i/>;<br/>
<a NAME="E3:49"/><b>then </b><i><font color="Green">E24</font></i>: 
<font color="Maroon">d</font>,<font color="Maroon">c</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 
<b>by </b><i/>;<br/>
<a NAME="E4:49"/><b>then </b><i><font color="Green">E33</font></i>: 
<font color="Maroon">d</font>,<font color="Maroon">c</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="parsp_1.html#D1" target="_self">Def1</a></i>;<br/>
<a NAME="E5:49"/><b>then </b>
<font color="Maroon">c</font>,<font color="Maroon">d</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">a</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E6:49"/>
( <font color="Maroon">b</font>,<font color="Maroon">a</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">c</font>,<font color="Maroon">d</font> &amp; <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">d</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">a</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">d</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">c</font>,<font color="Maroon">d</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> &amp; <font color="Maroon">d</font>,<font color="Maroon">c</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> &amp; <font color="Maroon">c</font>,<font color="Maroon">d</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">a</font> &amp; <font color="Maroon">d</font>,<font color="Maroon">c</font> <a href="parsp_1.html#R1" target="_self">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">a</font> )
 <b>by </b><i>, <a class="ref" href="parsp_1.html#T3" target="_self">Th3</a>, , </i>;<br/>


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