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

<b>let </b><font color="Maroon">OAS</font> be   <a href="analoaf.html#NM1">OAffinSpace</a>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font>;<br/><b>let </b><font color="Maroon">b</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font>;<br/><b>let </b><font color="Maroon">f</font> be   <a href="funct_2.html#NM2">Permutation</a> of the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">OAS</font>;<br/>







<b>assume </b><a NAME="E1:76"/><i><font color="Green">E22</font></i>: 
( <font color="Maroon">f</font> <a href="transgeo.html#NR7" target="_self">is_Tr</a>  &amp; <font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> &amp; <font color="Maroon">b</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> &amp;  <a href="diraf.html#R1">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> )
 ;<br/>

<a NAME="E2:76"/><b>then </b><i><font color="Green">E25</font></i>: 
<font color="Maroon">f</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="partfun1.html#K6">id</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">OAS</font>
 
<b>by </b><i><a class="ref" href="funct_1.html#T35">FUNCT_1:35</a></i>;<br/>
<a NAME="E3:76"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">f</font> <a href="transgeo.html#NR6" target="_self">is_Dil</a> 
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, </i>;<br/>
<a NAME="E4:76"/><i><font color="Green">E28</font></i>: 
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T34">DIRAF:34</a></i>;<br/>
<a NAME="E5:76"/><b>then </b><i><font color="Green">E30</font></i>: 
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 
<b>by </b><i><a class="ref" href="diraf.html#T36">DIRAF:36</a></i>;<br/>
<a NAME="E6:76"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#D3">DIRAF:def 3</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:76_1"/><i><font color="Green">E34</font></i>: 
<font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">b</font>
 ;<br/><a NAME="E2:76_1"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T30" target="_self">Th30</a>, </i>;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:76_1_1"/><i><font color="Green">E36</font></i>: 
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 ;<br/><a NAME="E2:76_1_1"/><i><font color="Green">E37</font></i>: 
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">b</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_1"><b>proof </b></a><div class="add">

<a NAME="E1:76_1_1_1"/>
( <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> &amp; <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> )
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="txt" href="transgeo.html#E6:76_1_1"><i><font color="Green">E50</font></i></a>, <a class="txt" href="transgeo.html#E7:76_1_1"><i><font color="Green">E51</font></i></a>, <a class="ref" href="transgeo.html#T24" target="_self">Th24</a>, <a class="ref" href="analoaf.html#D5">ANALOAF:def 5</a></i>;<br/>
<a NAME="E2:76_1_1_1"/><b>then </b>
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T6">DIRAF:6</a></i>;<br/>
<a NAME="E3:76_1_1_1"/><b>then </b>
<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="txt" href="transgeo.html#E8:76_1_1"><i><font color="Green">E52</font></i></a>, <a class="txt" href="transgeo.html#E11:76_1_1"><i><font color="Green">E54</font></i></a>, <a class="ref" href="analoaf.html#D5">ANALOAF:def 5</a></i>;<br/>
<a NAME="E4:76_1_1_1"/><b>then </b>
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="diraf.html#D3">DIRAF:def 3</a></i>;<br/>
<b>hence </b><a NAME="E5:76_1_1_1"/>
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="diraf.html#T13">DIRAF:13</a></i>;<br/>


</div><b>end;</b></div><b>consider </b><font color="Maroon">q</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font><b> such that </b><br/><a NAME="E4:76_1_1"/><i><font color="Green">E49</font></i>: 
not  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T43">DIRAF:43</a></i>;<br/><b>consider </b><font color="Maroon">x</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font><b> such that </b><br/><a NAME="E6:76_1_1"/><i><font color="Green">E50</font></i>: 
( <font color="Maroon">q</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">x</font> &amp; <font color="Maroon">q</font>,<font color="Maroon">a</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> )
 <b>by </b><i><a class="txt" href="transgeo.html#E7:76_1_1"><i><font color="Green">E51</font></i></a>, <a class="txt" href="transgeo.html#E8:76_1_1"><i><font color="Green">E52</font></i></a>, <a class="ref" href="analoaf.html#D5">ANALOAF:def 5</a></i>;<br/><a NAME="E7:76_1_1"/><i><font color="Green">E51</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_2"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:76_1_1_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 ;<br/>

<a NAME="E2:76_1_1_2"/><b>then </b>
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">q</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T35" target="_self">Th35</a>, <a class="ref" href="diraf.html#D3">DIRAF:def 3</a></i>;<br/>
<a NAME="E3:76_1_1_2"/><b>then </b>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">q</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="diraf.html#T34">DIRAF:34</a></i>;<br/>
<a NAME="E4:76_1_1_2"/><b>then </b>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">q</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">a</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">b</font> )
 
<b>by </b><i><a class="txt" href="transgeo.html#E4:76_1_1"><i><font color="Green">E49</font></i></a>, <a class="ref" href="diraf.html#T36">DIRAF:36</a>, <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/>
<a NAME="E5:76_1_1_2"/><b>then </b>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">q</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">a</font> )
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T36">DIRAF:36</a>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/>
<b>hence </b><a NAME="E6:76_1_1_2"/>
contradiction
 <b>by </b><i><a class="txt" href="transgeo.html#E8:76_1_1"><i><font color="Green">E52</font></i></a>, <a class="ref" href="transgeo.html#D4" target="_self">Def4</a>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/>


</div><b>end;</b></div><a NAME="E8:76_1_1"/><i><font color="Green">E52</font></i>: 
not  <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_3"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:76_1_1_3"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 ;<br/>

<a NAME="E2:76_1_1_3"/><b>then </b>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">x</font>,<font color="Maroon">b</font>
 
<b>by </b><i><a class="ref" href="diraf.html#T36">DIRAF:36</a></i>;<br/>
<a NAME="E3:76_1_1_3"/><b>then </b>
( <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> &amp; <font color="Maroon">q</font>,<font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> )
 
<b>by </b><i><a class="ref" href="transgeo.html#T35" target="_self">Th35</a>, <a class="ref" href="diraf.html#D4">DIRAF:def 4</a>, <a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/>
<a NAME="E4:76_1_1_3"/><b>then </b>
( <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">a</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">a</font> )
 
<b>by </b><i><a class="txt" href="transgeo.html#E4:76_1_1"><i><font color="Green">E49</font></i></a>, , <a class="ref" href="diraf.html#T28">DIRAF:28</a>, <a class="ref" href="diraf.html#T36">DIRAF:36</a></i>;<br/>
<a NAME="E5:76_1_1_3"/><b>then </b>
( <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">a</font> &amp; <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">a</font> )
 
<b>by </b><i><a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/>
<a NAME="E6:76_1_1_3"/><b>then </b>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T28">DIRAF:28</a></i>;<br/>
<a NAME="E7:76_1_1_3"/><b>then </b>
<font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">a</font>,<font color="Maroon">q</font>
 
<b>by </b><i><a class="ref" href="diraf.html#T27">DIRAF:27</a></i>;<br/>
<b>hence </b><a NAME="E8:76_1_1_3"/>
contradiction
 <b>by </b><i><a class="ref" href="transgeo.html#D4" target="_self">Def4</a>, <a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/>


</div><b>end;</b></div><a NAME="E9:76_1_1"/><i><font color="Green">E53</font></i>: 
( <font color="Maroon">a</font>,<font color="Maroon">q</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> &amp; <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> &amp; <font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">q</font> )
 <b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="transgeo.html#D4" target="_self">Def4</a>, <a class="ref" href="transgeo.html#T23" target="_self">Th23</a>, <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/><a NAME="E10:76_1_1"/>
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">q</font>,<font color="Maroon">b</font>,<font color="Maroon">x</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T35" target="_self">Th35</a>, <a class="ref" href="diraf.html#D3">DIRAF:def 3</a></i>;<br/><a NAME="E11:76_1_1"/><b>then </b><i><font color="Green">E54</font></i>: 
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">x</font>,<font color="Maroon">b</font>,<font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="diraf.html#T13">DIRAF:13</a></i>;<br/><a NAME="E12:76_1_1"/><i><font color="Green">E90</font></i>: 
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_4"><b>proof </b></a><div class="add">

<a NAME="E1:76_1_1_4"/>
<font color="Maroon">a</font>,<font color="Maroon">q</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T35" target="_self">Th35</a>, <a class="ref" href="diraf.html#T5">DIRAF:5</a></i>;<br/>
<a NAME="E2:76_1_1_4"/><b>then </b>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i>, <a class="ref" href="analoaf.html#D5">ANALOAF:def 5</a></i>;<br/>
<a NAME="E3:76_1_1_4"/><b>then </b>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/>
<a NAME="E4:76_1_1_4"/><b>then </b>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>,<font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/>
<b>hence </b><a NAME="E5:76_1_1_4"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="diraf.html#T36">DIRAF:36</a></i>;<br/>


</div><b>end;</b></div><a NAME="E13:76_1_1"/>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_5"><b>proof </b></a><div class="add">

<a NAME="E1:76_1_1_5"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">a</font>,<font color="Maroon">b</font>
 
<b>by </b><i><a class="txt" href="transgeo.html#E4:76_1_1"><i><font color="Green">E49</font></i></a>, <a class="ref" href="diraf.html#T36">DIRAF:36</a></i>;<br/>
<a NAME="E2:76_1_1_5"/><b>then </b>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>
 
<b>by </b><i><a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/>
<a NAME="E3:76_1_1_5"/><b>then </b>
( <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> &amp; <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> )
 
<b>by </b><i>, <a class="ref" href="diraf.html#T27">DIRAF:27</a>, <a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/>
<a NAME="E4:76_1_1_5"/><b>then </b>
<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="diraf.html#T28">DIRAF:28</a></i>;<br/>
<b>hence </b><a NAME="E5:76_1_1_5"/>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="diraf.html#T27">DIRAF:27</a></i>;<br/>


</div><b>end;</b></div><a NAME="E14:76_1_1"/><b>then </b>
 <a href="diraf.html#R1">Mid</a> <font color="Maroon">x</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="transgeo.html#D5" target="_self">Def5</a>, , <a class="txt" href="transgeo.html#E43"><i><font color="Green">Lemma62</font></i></a>, <a class="ref" href="pasch.html#T15">PASCH:15</a></i>;<br/><b>then consider </b><font color="Maroon">y</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font><b> such that </b><br/><a NAME="E16:76_1_1"/><i><font color="Green">E91</font></i>: 
(  <a href="diraf.html#R1">Mid</a> <font color="Maroon">x</font>,<font color="Maroon">y</font>,<font color="Maroon">b</font> &amp;  <a href="diraf.html#R1">Mid</a> <font color="Maroon">y</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> )
 <b>by </b><i>, <a class="ref" href="transgeo.html#D5" target="_self">Def5</a>, <a class="ref" href="pasch.html#T35">PASCH:35</a></i>;<br/><a NAME="E17:76_1_1"/><i><font color="Green">E92</font></i>: 
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">y</font>,<font color="Maroon">b</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">y</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> )
 <b>by </b><i><a class="txt" href="transgeo.html#E44"><i><font color="Green">Lemma63</font></i></a>, <a class="ref" href="diraf.html#T34">DIRAF:34</a></i>;<br/><a NAME="E18:76_1_1"/><i><font color="Green">E93</font></i>: 
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">a</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font> )
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_6"><b>proof </b></a><div class="add">

<a NAME="E1:76_1_1_6"/><i><font color="Green">E94</font></i>: 
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">a</font> )
 
<b>by </b><i><a class="ref" href="transgeo.html#T30" target="_self">Th30</a>, <a class="txt" href="transgeo.html#E6:76_1_1"><i><font color="Green">E50</font></i></a>, , <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/>
<b>hence </b><a NAME="E2:76_1_1_6"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">a</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="txt" href="transgeo.html#E6:76_1_1"><i><font color="Green">E50</font></i></a>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/>

<a NAME="E3:76_1_1_6"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 
<b>by </b><i><a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/>
<b>hence </b><a NAME="E4:76_1_1_6"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="txt" href="transgeo.html#E6:76_1_1"><i><font color="Green">E50</font></i></a>, <a class="ref" href="transgeo.html#T37" target="_self">Th37</a>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/>


</div><b>end;</b></div><a NAME="E19:76_1_1"/><i><font color="Green">E106</font></i>: 
<font color="Maroon">b</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="transgeo.html#T29" target="_self">Th29</a>, <a class="txt" href="transgeo.html#E2:76_1_1"><i><font color="Green">E37</font></i></a></i>;<br/><a NAME="E20:76_1_1"/><b>then </b><i><font color="Green">E107</font></i>: 
not  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="transgeo.html#D4" target="_self">Def4</a>, , <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/><a NAME="E21:76_1_1"/><i><font color="Green">E108</font></i>: 
not  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="76_1_1_7"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:76_1_1_7"/>
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 ;<br/>

<a NAME="E2:76_1_1_7"/><b>then </b>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> )
 
<b>by </b><i><a class="ref" href="transgeo.html#T28" target="_self">Th28</a>, <a class="ref" href="transgeo.html#T30" target="_self">Th30</a>, <a class="txt" href="transgeo.html#E13"><i><font color="Green">Lemma38</font></i></a></i>;<br/>
<a NAME="E3:76_1_1_7"/><b>then </b>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>,<font color="Maroon">q</font> )
 
<b>by </b><i><a class="ref" href="diraf.html#T27">DIRAF:27</a></i>;<br/>
<b>hence </b><a NAME="E4:76_1_1_7"/>
contradiction
 <b>by </b><i><a class="ref" href="transgeo.html#T37" target="_self">Th37</a>, <a class="ref" href="transgeo.html#T38" target="_self">Th38</a>, <a class="ref" href="diraf.html#T39">DIRAF:39</a></i>;<br/>


</div><b>end;</b></div><a NAME="E22:76_1_1"/><i><font color="Green">E109</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="transgeo.html#D5" target="_self">Def5</a>, <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/><a NAME="E23:76_1_1"/><i><font color="Green">E110</font></i>: 
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">b</font>,<font color="Maroon">q</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">b</font>,<font color="Maroon">y</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">x</font>,<font color="Maroon">b</font>,<font color="Maroon">b</font> )
 <b>by </b><i>, , <a class="ref" href="diraf.html#T34">DIRAF:34</a>, <a class="ref" href="diraf.html#T36">DIRAF:36</a>, <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/><a NAME="E24:76_1_1"/><b>then </b><i><font color="Green">E111</font></i>: 
 <a href="diraf.html#R3">LIN</a> <font color="Maroon">y</font>,<font color="Maroon">b</font>,<font color="Maroon">q</font>
 <b>by </b><i>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/><a NAME="E25:76_1_1"/><i><font color="Green">E112</font></i>: 
( <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> &amp; <font color="Maroon">b</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">q</font> )
 <b>by </b><i><a class="ref" href="transgeo.html#T39" target="_self">Th39</a>, <a class="ref" href="diraf.html#T37">DIRAF:37</a></i>;<br/><a NAME="E26:76_1_1"/><i><font color="Green">E113</font></i>: 
<font color="Maroon">b</font>,<font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>
 <b>by </b><i><a class="ref" href="transgeo.html#T30" target="_self">Th30</a>, </i>;<br/><a NAME="E27:76_1_1"/>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font>,<font color="Maroon">y</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">b</font>,<font color="Maroon">q</font>,<font color="Maroon">y</font> )
 <b>by </b><i>, , , <a class="ref" href="diraf.html#T36">DIRAF:36</a>, <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/><a NAME="E28:76_1_1"/><b>then </b>
( <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">y</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">y</font> )
 <b>by </b><i><a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/><a NAME="E29:76_1_1"/><b>then </b>
( <font color="Maroon">b</font>,<font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">y</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">y</font> )
 <b>by </b><i>, , <a class="ref" href="diraf.html#T28">DIRAF:28</a></i>;<br/><a NAME="E30:76_1_1"/><b>then </b>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>,<font color="Maroon">y</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">y</font>
 <b>by </b><i>, <a class="ref" href="diraf.html#T28">DIRAF:28</a></i>;<br/><a NAME="E31:76_1_1"/><b>then </b>
<font color="Maroon">y</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">y</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="diraf.html#T27">DIRAF:27</a></i>;<br/><a NAME="E32:76_1_1"/><b>then </b>
(  <a href="diraf.html#R3">LIN</a> <font color="Maroon">y</font>,<font color="Maroon">b</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font> &amp;  <a href="diraf.html#R3">LIN</a> <font color="Maroon">y</font>,<font color="Maroon">b</font>,<font color="Maroon">b</font> )
 <b>by </b><i><a class="ref" href="diraf.html#T37">DIRAF:37</a>, <a class="ref" href="diraf.html#D5">DIRAF:def 5</a></i>;<br/><b>hence </b><a NAME="E33:76_1_1"/>
contradiction
 <b>by </b><i>, <a class="ref" href="transgeo.html#T38" target="_self">Th38</a>, <a class="ref" href="transgeo.html#T39" target="_self">Th39</a>, , <a class="ref" href="diraf.html#T38">DIRAF:38</a></i>;<br/></div><b>end;</b></div><b>hence </b><a NAME="E4:76_1"/>
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 <b>by </b><i>, <a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E8:76"/>
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font>,<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="diraf.html#T7">DIRAF:7</a></i>;<br/>


</div>
