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

<b>let </b><font color="Maroon">N</font> be   <a href="e_siec.html#NM2">e_net</a>;<br/>

<a NAME="E1:34"/><i><font color="Green">E16</font></i>: 
( the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span> &amp; the <a href="e_siec.html#U2" target="_self">escape</a> of <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span> )
 
<b>by </b><i/>;<br/>
<a NAME="E2:34"/><b>then </b>
the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="xboole_0.html#K2">\/</a> the <a href="e_siec.html#U2" target="_self">escape</a> of <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T8">XBOOLE_1:8</a></i>;<br/>
<a NAME="E3:34"/><b>then </b><i><font color="Green">E21</font></i>: 
<span class="p1">(<span class="default">the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="xboole_0.html#K2">\/</a> the <a href="e_siec.html#U2" target="_self">escape</a> of <font color="Maroon">N</font></span>)</span> <a href="relat_1.html#K4">~</a>  <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i><a class="ref" href="sysrel.html#T16">SYSREL:16</a></i>;<br/>
<a NAME="E4:34"/>
the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="relat_1.html#K4">~</a>  <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i>, <a class="ref" href="sysrel.html#T16">SYSREL:16</a></i>;<br/>
<a NAME="E5:34"/><b>then </b><i><font color="Green">E22</font></i>: 
<span class="p1">(<span class="default">the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="relat_1.html#K4">~</a> </span>)</span> <a href="xboole_0.html#K2">\/</a> the <a href="e_siec.html#U2" target="_self">escape</a> of <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i>, <a class="ref" href="xboole_1.html#T8">XBOOLE_1:8</a></i>;<br/>
<a NAME="E6:34"/>
 <a href="relat_1.html#K6">id</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font>,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i><a class="ref" href="relset_1.html#T28">RELSET_1:28</a></i>;<br/>
<a NAME="E7:34"/><b>then </b>
<span class="p1">(<span class="default"><span class="p2">(<span class="default">the <a href="e_siec.html#U1" target="_self">entrance</a> of <font color="Maroon">N</font> <a href="relat_1.html#K4">~</a> </span>)</span> <a href="xboole_0.html#K2">\/</a> the <a href="e_siec.html#U2" target="_self">escape</a> of <font color="Maroon">N</font></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="relat_1.html#K6">id</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">N</font></span>)</span> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span>,<span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span></span><a href="zfmisc_1.html#K2">:]</a></span>
 
<b>by </b><i><a class="ref" href="e_siec.html#D2" target="_self">Def2</a>, <a class="ref" href="xboole_1.html#T8">XBOOLE_1:8</a></i>;<br/>
<b>hence </b><a NAME="E8:34"/>
(  <a href="e_siec.html#K14" target="_self">e_prox</a> <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span>,<span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span></span><a href="zfmisc_1.html#K2">:]</a></span> &amp;  <a href="e_siec.html#K15" target="_self">e_flow</a> <font color="Maroon">N</font> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span>,<span class="p2">(<span class="default"><a href="e_siec.html#K13" target="_self">e_shore</a> <font color="Maroon">N</font></span>)</span></span><a href="zfmisc_1.html#K2">:]</a></span> )
 <b>by </b><i/>;<br/>


</div>
