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<b>set </b><font color="Maroon">cX</font> =  <a href="waybel_8.html#K2">compactbelow</a> <font color="Maroon">x</font>;<br/>
<b>let </b><font color="Maroon">xx</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>, <font color="Maroon">yy</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_0.html#D1">WAYBEL_0:def 1</a><br/>

<b>assume </b><a NAME="E1:18_1_1"/><i><font color="Green">E36</font></i>: 
( <font color="Maroon">xx</font> <a href="hidden.html#R2">in</a>  <a href="waybel_8.html#K2">compactbelow</a> <font color="Maroon">x</font> &amp; <font color="Maroon">yy</font> <a href="hidden.html#R2">in</a>  <a href="waybel_8.html#K2">compactbelow</a> <font color="Maroon">x</font> )
 ;<br/>

<b>set </b><font color="Maroon">z</font> = <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font>;<br/>
<b>take </b>
<font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font>
;<br/>

<a NAME="E2:18_1_1"/>
( <font color="Maroon">xx</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">x</font> &amp; <font color="Maroon">yy</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">x</font> )
 
<b>by </b><i>, <a class="ref" href="waybel_8.html#T4">WAYBEL_8:4</a></i>;<br/>
<a NAME="E3:18_1_1"/><b>then </b><i><font color="Green">E37</font></i>: 
<font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="yellow_0.html#T22">YELLOW_0:22</a></i>;<br/>
<a NAME="E4:18_1_1"/><i><font color="Green">E38</font></i>: 
( <font color="Maroon">xx</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> &amp; <font color="Maroon">yy</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> )
 
<b>by </b><i><a class="ref" href="yellow_0.html#T22">YELLOW_0:22</a></i>;<br/>
<a NAME="E5:18_1_1"/>
( <font color="Maroon">xx</font> is <a href="waybel_3.html#V1">compact</a> &amp; <font color="Maroon">yy</font> is <a href="waybel_3.html#V1">compact</a> )
 
<b>by </b><i>, <a class="ref" href="waybel_8.html#T4">WAYBEL_8:4</a></i>;<br/>
<a NAME="E6:18_1_1"/><b>then </b>
( <font color="Maroon">xx</font> <a href="waybel_3.html#NR2" target="_self">&lt;&lt;</a> <font color="Maroon">xx</font> &amp; <font color="Maroon">yy</font> <a href="waybel_3.html#NR2" target="_self">&lt;&lt;</a> <font color="Maroon">yy</font> )
 
<b>by </b><i><a class="ref" href="waybel_3.html#D2">WAYBEL_3:def 2</a></i>;<br/>
<a NAME="E7:18_1_1"/><b>then </b>
( <font color="Maroon">xx</font> <a href="waybel_3.html#NR2" target="_self">&lt;&lt;</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> &amp; <font color="Maroon">yy</font> <a href="waybel_3.html#NR2" target="_self">&lt;&lt;</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> )
 
<b>by </b><i>, <a class="ref" href="waybel_3.html#T2">WAYBEL_3:2</a></i>;<br/>
<a NAME="E8:18_1_1"/><b>then </b>
<font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> <a href="waybel_3.html#NR2" target="_self">&lt;&lt;</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font>
 
<b>by </b><i><a class="ref" href="waybel_3.html#T3">WAYBEL_3:3</a></i>;<br/>
<a NAME="E9:18_1_1"/><b>then </b>
<font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> is <a href="waybel_3.html#V1">compact</a>
 
<b>by </b><i><a class="ref" href="waybel_3.html#D2">WAYBEL_3:def 2</a></i>;<br/>
<b>hence </b><a NAME="E10:18_1_1"/>
<font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> <a href="hidden.html#R2">in</a>  <a href="waybel_8.html#K2">compactbelow</a> <font color="Maroon">x</font>
 <b>by </b><i/>;<br/>

<b>thus </b><a NAME="E11:18_1_1"/>
( <font color="Maroon">xx</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> &amp; <font color="Maroon">yy</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">xx</font> <a href="lattice3.html#K13">"\/"</a> <font color="Maroon">yy</font> )
 <b>by </b><i><a class="ref" href="yellow_0.html#T22">YELLOW_0:22</a></i>;<br/>


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