<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">N</font> be  <a href="group_1.html#V6">finite</a> <a href="waybel_0.html#NM8">LATTICE</a>;<br/>

<b>set </b><font color="Maroon">I</font> =  <a href="yellow_1.html#K2">InclPoset</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span>;<br/>
<b>take </b><font color="Maroon">i</font> =  <a href="yellow_2.html#K3">IdsMap</a> <font color="Maroon">N</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_1.html#D8">WAYBEL_1:def 8</a><br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="30_1"><b>now </b></a><div class="add"><b>thus </b><a NAME="E1:30_1"/>
( not <font color="Maroon">N</font> is <a href="struct_0.html#V3">empty</a> &amp; not  <a href="yellow_1.html#K2">InclPoset</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span> is <a href="struct_0.html#V3">empty</a> implies ( <font color="Maroon">i</font> is <a href="funct_1.html#V2">one-to-one</a> &amp; <font color="Maroon">i</font> is <a href="orders_3.html#V5">monotone</a> &amp;  ex <font color="Olive">s</font> being  <a href="struct_0.html#NM6">Function</a> of <span class="p1">(<span class="default"><a href="yellow_1.html#K2">InclPoset</a> <span class="p2">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span></span>)</span>,<font color="Maroon">N</font> st <br/>( <font color="Olive">s</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font> <a href="funct_1.html#K2">"</a>  &amp; <font color="Olive">s</font> is <a href="orders_3.html#V5">monotone</a> ) ) )
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="30_1_1"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:30_1_1"/>
( not <font color="Maroon">N</font> is <a href="struct_0.html#V3">empty</a> &amp; not  <a href="yellow_1.html#K2">InclPoset</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span> is <a href="struct_0.html#V3">empty</a> )
 ;<br/>

<b>thus </b><a NAME="E2:30_1_1"/>
( <font color="Maroon">i</font> is <a href="funct_1.html#V2">one-to-one</a> &amp; <font color="Maroon">i</font> is <a href="orders_3.html#V5">monotone</a> )
 ;<br/>

<b>take </b><font color="Maroon">s</font> =  <a href="yellow_2.html#K2">SupMap</a> <font color="Maroon">N</font>;<br/>

<a NAME="E3:30_1_1"/><i><font color="Green">E28</font></i>: 
 <a href="relset_1.html#K4">dom</a> <font color="Maroon">s</font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="yellow_1.html#K2">InclPoset</a> <span class="p2">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="funct_2.html#D1">FUNCT_2:def 1</a></i>;<br/>
<a NAME="E4:30_1_1"/>
<span class="p1"><a href="waybel_1.html#K1">[</a><span class="default"><font color="Maroon">i</font>,<font color="Maroon">s</font></span><a href="waybel_1.html#K1">]</a></span> is <a href="waybel_1.html#V3">Galois</a>
 
<b>by </b><i><a class="ref" href="waybel_1.html#T60">WAYBEL_1:60</a></i>;<br/>
<a NAME="E5:30_1_1"/><b>then </b>
<font color="Maroon">i</font> is <a href="funct_2.html#V2">onto</a>
 
<b>by </b><i><a class="ref" href="waybel_1.html#T26">WAYBEL_1:26</a></i>;<br/>
<a NAME="E6:30_1_1"/><b>then </b><i><font color="Green">E35</font></i>: 
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">i</font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="yellow_1.html#K2">InclPoset</a> <span class="p2">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="funct_2.html#D3">FUNCT_2:def 3</a></i>;<br/>
<a NAME="E7:30_1_1"/>
for <font color="Olive">y</font>, <font color="Olive">x</font> being   <a href="hidden.html#M1">set</a>  holds <br/> ( <font color="Olive">y</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K5">rng</a> <font color="Maroon">i</font> &amp; <font color="Olive">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">s</font> <a href="funct_1.html#K1">.</a> <font color="Olive">y</font> iff ( <font color="Olive">x</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K4">dom</a> <font color="Maroon">i</font> &amp; <font color="Olive">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font> <a href="funct_1.html#K1">.</a> <font color="Olive">x</font> ) )
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="30_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">y</font> be    <a href="hidden.html#M1">set</a> , <font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<a NAME="E1:30_1_1_1"/><i><font color="Green">E36</font></i>: 
 <a href="relset_1.html#K4">dom</a> <font color="Maroon">i</font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>
 
<b>by </b><i><a class="ref" href="funct_2.html#D1">FUNCT_2:def 1</a></i>;<br/>
<div><b>hereby </b>
<div class="add"><b>assume </b><b>that </b><br/><a NAME="E1:30_1_1_1_1"/><i><font color="Green">E38</font></i>: 
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K5">rng</a> <font color="Maroon">i</font>
 <b>and </b><br/><a NAME="E2:30_1_1_1_1"/><i><font color="Green">E39</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">s</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">y</font>
 ;<br/><b>reconsider </b><font color="Maroon">Y</font> = <font color="Maroon">y</font> as   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="yellow_1.html#K2">InclPoset</a> <span class="p2">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span></span>)</span> <b>by </b><i/>;<br/><b>reconsider </b><font color="Maroon">Y1</font> = <font color="Maroon">Y</font> as   <a href="waybel_0.html#NM3">Ideal</a> of <font color="Maroon">N</font> <b>by </b><i><a class="ref" href="yellow_2.html#T43">YELLOW_2:43</a></i>;<br/><a NAME="E5:30_1_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">s</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">Y</font>
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E6:30_1_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K4">dom</a> <font color="Maroon">i</font>
 <b>by </b><i/>;<br/><a NAME="E7:30_1_1_1_1"/><i><font color="Green">E52</font></i>: 
 <a href="yellow_0.html#NK3" target="_self">sup</a> <font color="Maroon">Y1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">Y1</font>
 <b>by </b><i><a class="ref" href="waybel_3.html#T16">WAYBEL_3:16</a></i>;<br/><b>thus </b><font color="Maroon">i</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">x</font> = 
<font color="Maroon">i</font> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><a href="yellow_0.html#NK3" target="_self">sup</a> <font color="Maroon">Y1</font></span>)</span>
<b>by </b><i>, <a class="ref" href="yellow_2.html#D3">YELLOW_2:def 3</a></i>
<br/>.= 
 <a href="waybel_0.html#K5">downarrow</a> <span class="p1">(<span class="default"><a href="yellow_0.html#NK3" target="_self">sup</a> <font color="Maroon">Y1</font></span>)</span>
<b>by </b><i><a class="ref" href="yellow_2.html#D4">YELLOW_2:def 4</a></i>
<br/>.= 
<font color="Maroon">y</font>
<b>by </b><i>, <a class="ref" href="waybel14.html#T5">WAYBEL14:5</a></i>
;<br/></div>
<b>end;</b></div>

<b>assume </b><b>that </b><br/><a NAME="E3:30_1_1_1"/><i><font color="Green">E70</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K4">dom</a> <font color="Maroon">i</font>
 <b>and </b><br/><a NAME="E4:30_1_1_1"/><i><font color="Green">E71</font></i>: 
<font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">x</font>
 ;<br/>

<b>reconsider </b><font color="Maroon">X</font> = <font color="Maroon">x</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">N</font> <b>by </b><i/>;<br/>
<a NAME="E6:30_1_1_1"/><i><font color="Green">E72</font></i>: 
<font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">X</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E7:30_1_1_1"/>
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K5">rng</a> <font color="Maroon">i</font>
 <b>by </b><i/>;<br/>

<b>reconsider </b><font color="Maroon">Y</font> = <font color="Maroon">y</font> as   <a href="waybel_0.html#NM3">Ideal</a> of <font color="Maroon">N</font> <b>by </b><i>, <a class="ref" href="yellow_2.html#T43">YELLOW_2:43</a></i>;<br/>
<b>thus </b><font color="Maroon">s</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">y</font> = 
 <a href="yellow_0.html#NK3" target="_self">sup</a> <font color="Maroon">Y</font>
<b>by </b><i><a class="ref" href="yellow_2.html#D3">YELLOW_2:def 3</a></i>
<br/>.= 
 <a href="yellow_0.html#NK3" target="_self">sup</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K5">downarrow</a> <font color="Maroon">X</font></span>)</span>
<b>by </b><i>, <a class="ref" href="yellow_2.html#D4">YELLOW_2:def 4</a></i>
<br/>.= 
<font color="Maroon">x</font>
<b>by </b><i><a class="ref" href="waybel_0.html#T34">WAYBEL_0:34</a></i>
;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E8:30_1_1"/>
<font color="Maroon">s</font> <a href="hidden.html#R1">=</a> <font color="Maroon">i</font> <a href="funct_1.html#K2">"</a> 
 <b>by </b><i>, , <a class="ref" href="funct_1.html#T54">FUNCT_1:54</a></i>;<br/>

<b>thus </b><a NAME="E9:30_1_1"/>
<font color="Maroon">s</font> is <a href="orders_3.html#V5">monotone</a>
 ;<br/>


</div><b>end;</b></div><b>thus </b><a NAME="E2:30_1"/>
( ( <font color="Maroon">N</font> is <a href="struct_0.html#V3">empty</a> or  <a href="yellow_1.html#K2">InclPoset</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span> is <a href="struct_0.html#V3">empty</a> ) implies ( <font color="Maroon">N</font> is <a href="struct_0.html#V3">empty</a> &amp;  <a href="yellow_1.html#K2">InclPoset</a> <span class="p1">(<span class="default"><a href="waybel_0.html#K7">Ids</a> <font color="Maroon">N</font></span>)</span> is <a href="struct_0.html#V3">empty</a> ) )
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E2:30"/>
<font color="Maroon">i</font> is <a href="waybel_0.html#V23">V232</a>
 <b>by </b><i><a class="ref" href="waybel_0.html#D38">WAYBEL_0:def 38</a></i>;<br/>


</div>
