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<a NAME="E1:87_1_1"/><i><font color="Green">E30</font></i>: 
(  <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><font color="Maroon">v</font> <a href="cqc_lang.html#K3">.--&gt;</a> <font color="Maroon">val</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">v</font></span><a href="domain_1.html#K6">}</a></span> &amp;  <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default"><font color="Maroon">v</font> <a href="cqc_lang.html#K3">.--&gt;</a> <font color="Maroon">val</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">val</font></span><a href="tarski.html#K1">}</a></span> )
 
<b>by </b><i><a class="ref" href="cqc_lang.html#T5">CQC_LANG:5</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">X</font> = <font color="Maroon">v</font> <a href="cqc_lang.html#K3">.--&gt;</a> <font color="Maroon">val</font> as   <a href="partfun1.html#NM1">PartFunc</a> of <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">v</font></span><a href="domain_1.html#K6">}</a></span>,<span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">val</font></span><a href="tarski.html#K1">}</a></span> <b>by </b><i><a class="ref" href="partfun1.html#T24">PARTFUN1:24</a></i>;<br/>
<b>reconsider </b><font color="Maroon">X</font> = <font color="Maroon">X</font> as   <a href="partfun1.html#NM1">PartFunc</a> of  <a href="glib_000.html#K6">the_Vertices_of</a> <font color="Maroon">G</font>,<span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">val</font></span><a href="tarski.html#K1">}</a></span> <b>by </b><i>, <a class="ref" href="partfun1.html#T28">PARTFUN1:28</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="87_1_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:87_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">val</font></span><a href="tarski.html#K1">}</a></span>
 ;<br/><a NAME="E2:87_1_1_1"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">val</font>
 <b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/><b>hence </b><a NAME="E3:87_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="numbers.html#K1">REAL</a> 
 <b>by </b><i><a class="ref" href="xreal_0.html#D1">XREAL_0:def 1</a></i>;<br/></div><b>end;</b></div>
<a NAME="E5:87_1_1"/><b>then </b>
<span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">val</font></span><a href="tarski.html#K1">}</a></span> <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K1">REAL</a> 
 
<b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">X</font> = <font color="Maroon">X</font> as   <a href="partfun1.html#NM1">PartFunc</a> of  <a href="glib_000.html#K6">the_Vertices_of</a> <font color="Maroon">G</font>, <a href="numbers.html#K1">REAL</a>  <b>by </b><i>, <a class="ref" href="partfun1.html#T29">PARTFUN1:29</a></i>;<br/>
<a NAME="E7:87_1_1"/>
<font color="Maroon">G</font> <a href="glib_000.html#K13">.set</a> <a href="glib_003.html#K4" target="_self">VLabelSelector</a> ,<font color="Maroon">X</font> is <a href="glib_003.html#V10" target="_self">real-vlabeled</a>
 
;<br/>
<b>hence </b><a NAME="E8:87_1_1"/>
<font color="Maroon">G</font> <a href="glib_000.html#K13">.set</a> <a href="glib_003.html#K4" target="_self">VLabelSelector</a> ,<span class="p1">(<span class="default"><font color="Maroon">v</font> <a href="cqc_lang.html#K3">.--&gt;</a> <font color="Maroon">val</font></span>)</span> is <a href="glib_003.html#V3" target="_self">[VLabeled]</a>
 ;<br/>


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