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<b>let </b><font color="Maroon">V</font> be  <a href="orders_2.html#V4">antisymmetric</a> <a href="lattice3.html#V1" target="_self">with_suprema</a>  <a href="orders_2.html#L1">RelStr</a> ;<br/><b>let </b><font color="Maroon">u1</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">u2</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">u3</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">V</font>;<br/>







<b>assume </b><a NAME="E1:39"/><i><font color="Green">E18</font></i>: 
<font color="Maroon">V</font> is <a href="orders_2.html#V3">transitive</a>
 ;<br/>

<a NAME="E2:39"/><i><font color="Green">E22</font></i>: 
( <font color="Maroon">u1</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font> &amp; <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font> &amp; <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u2</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> &amp; <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u2</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> &amp; <font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> &amp; <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> )
 
<b>by </b><i/>;<br/>
<a NAME="E3:39"/><b>then </b><i><font color="Green">E25</font></i>: 
( <font color="Maroon">u1</font> <a href="orders_2.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> &amp; <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> )
 
<b>by </b><i>, <a class="ref" href="orders_2.html#T26">ORDERS_2:26</a></i>;<br/>
<a NAME="E4:39"/><b>then </b><i><font color="Green">E26</font></i>: 
<font color="Maroon">u2</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font>
 
<b>by </b><i>, </i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="39_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">u4</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">V</font>;<br/><b>assume </b><a NAME="E1:39_1"/><i><font color="Green">E31</font></i>: 
( <font color="Maroon">u1</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font> &amp; <font color="Maroon">u2</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font> )
 ;<br/><a NAME="E2:39_1"/><b>then </b><i><font color="Green">E61</font></i>: 
( <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font> &amp; <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font> )
 <b>by </b><i>, , <a class="ref" href="orders_2.html#T26">ORDERS_2:26</a></i>;<br/><a NAME="E3:39_1"/><b>then </b>
<font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font>
 <b>by </b><i>, </i>;<br/><b>hence </b><a NAME="E4:39_1"/>
<span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> <a href="orders_2.html#R1">&lt;=</a> <font color="Maroon">u4</font>
 <b>by </b><i><a class="txt" href="lattice3.html#E3:39"><i><font color="Green">E25</font></i></a>, </i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E6:39"/>
<span class="p1">(<span class="default"><font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u2</font></span>)</span> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font> <a href="hidden.html#R1">=</a> <font color="Maroon">u1</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <span class="p1">(<span class="default"><font color="Maroon">u2</font> <a href="lattice3.html#K10" target="_self">"\/"</a> <font color="Maroon">u3</font></span>)</span>
 <b>by </b><i><a class="txt" href="lattice3.html#E2:39"><i><font color="Green">E22</font></i></a>, , </i>;<br/>


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