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<b>let </b><font color="Maroon">c1</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">A</font>, <font color="Maroon">c2</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">A</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:34_1_1"/><i><font color="Green">E25</font></i>: 
( <font color="Maroon">a</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c1</font> &amp; <font color="Maroon">b</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c1</font> &amp; ( for <font color="Olive">c</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">A</font>  st <font color="Maroon">a</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> &amp; <font color="Maroon">b</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> holds <br/><font color="Maroon">c1</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> ) )
 <b>and </b><br/><a NAME="E2:34_1_1"/><i><font color="Green">E26</font></i>: 
( <font color="Maroon">a</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c2</font> &amp; <font color="Maroon">b</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c2</font> &amp; ( for <font color="Olive">c</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">A</font>  st <font color="Maroon">a</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> &amp; <font color="Maroon">b</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> holds <br/><font color="Maroon">c2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Olive">c</font> ) )
 ;<br/>

<a NAME="E3:34_1_1"/>
( <font color="Maroon">c1</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c2</font> &amp; <font color="Maroon">c2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">c1</font> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b><a NAME="E4:34_1_1"/>
<font color="Maroon">c1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">c2</font>
 <b>by </b><i>, <a class="ref" href="orders_2.html#T25">ORDERS_2:25</a></i>;<br/>


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