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<b>let </b><font color="Maroon">i</font> be   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a> </span>)</span>, <font color="Maroon">j</font> be   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a> </span>)</span>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel21.html#D2" target="_self">WAYBEL21:def 2</a><br/>

<a NAME="E1:32_1_1"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a>  is  <a href="yellow_0.html#V4">full</a>  <a href="yellow_0.html#M1">SubRelStr</a> of <font color="Maroon">T</font> <a href="yellow_7.html#NK1" target="_self">opp</a> 
 
<b>by </b><i><a class="ref" href="yellow_9.html#T7">YELLOW_9:7</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">x</font> = <font color="Maroon">i</font>, <font color="Maroon">y</font> = <font color="Maroon">j</font> as   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon">T</font> <a href="yellow_7.html#NK1" target="_self">opp</a> </span>)</span> <b>by </b><i><a class="ref" href="yellow_0.html#T59">YELLOW_0:59</a></i>;<br/>
<b>assume </b><a NAME="E3:32_1_1"/>
<font color="Maroon">i</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">j</font>
 ;<br/>

<a NAME="E4:32_1_1"/><b>then </b>
<font color="Maroon">x</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">y</font>
 
<b>by </b><i>, <a class="ref" href="yellow_0.html#T60">YELLOW_0:60</a></i>;<br/>
<a NAME="E5:32_1_1"/><b>then </b>
(  <a href="lattice3.html#K9">~</a> <font color="Maroon">x</font> <a href="orders_2.html#NR2" target="_self">&gt;=</a>  <a href="lattice3.html#K9">~</a> <font color="Maroon">y</font> &amp;  <a href="lattice3.html#K9">~</a> <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x</font> )
 
<b>by </b><i><a class="ref" href="yellow_7.html#T1">YELLOW_7:1</a></i>;<br/>
<a NAME="E6:32_1_1"/><b>then </b>
( <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a> </span>)</span> <a href="waybel_0.html#K2">.</a> <font color="Maroon">i</font> <a href="orders_2.html#NR2" target="_self">&gt;=</a>  <a href="lattice3.html#K9">~</a> <font color="Maroon">y</font> &amp;  <a href="lattice3.html#K9">~</a> <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">y</font> )
 
<b>by </b><i><a class="ref" href="yellow_9.html#T7">YELLOW_9:7</a></i>;<br/>
<b>hence </b><a NAME="E7:32_1_1"/>
<span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a> </span>)</span> <a href="waybel_0.html#K2">.</a> <font color="Maroon">i</font> <a href="orders_2.html#NR2" target="_self">&gt;=</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="yellow_9.html#K3">opp+id</a> </span>)</span> <a href="waybel_0.html#K2">.</a> <font color="Maroon">j</font>
 <b>by </b><i><a class="ref" href="yellow_9.html#T7">YELLOW_9:7</a></i>;<br/>


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