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<b>let </b><font color="Maroon">s</font> be    <a href="turing_1.html#L1" target="_self">TuringStr</a> , <font color="Maroon">t</font> be    <a href="turing_1.html#L1" target="_self">TuringStr</a> ;<br/><b>let </b><font color="Maroon">x</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="turing_1.html#K21" target="_self">UnionSt</a> <font color="Maroon">s</font>,<font color="Maroon">t</font>;<br/>



<b>set </b><font color="Maroon">q0</font> = the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font>;<br/>
<b>set </b><font color="Maroon">p1</font> = the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font>;<br/>
<b>set </b><font color="Maroon">A</font> = <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">s</font>,<span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font></span><a href="domain_1.html#K6">}</a></span></span><a href="zfmisc_1.html#K2">:]</a></span>;<br/>
<b>set </b><font color="Maroon">B</font> = <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font></span><a href="domain_1.html#K6">}</a></span>,the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">t</font></span><a href="zfmisc_1.html#K2">:]</a></span>;<br/>
<div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="85_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:85_1"/>
( <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">s</font>,<span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font></span><a href="domain_1.html#K6">}</a></span></span><a href="zfmisc_1.html#K2">:]</a></span> or <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font></span><a href="domain_1.html#K6">}</a></span>,the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">t</font></span><a href="zfmisc_1.html#K2">:]</a></span> )
 </span><b>by </b><i><a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="85_1_1"><b>suppose </b></a><a NAME="E1:85_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default">the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">s</font>,<span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font></span><a href="domain_1.html#K6">}</a></span></span><a href="zfmisc_1.html#K2">:]</a></span>
 ;<br/><div class="add"><b>then consider </b><font color="Maroon">x1</font> being   <a href="turing_1.html#NM1">State</a> of <font color="Maroon">s</font>, <font color="Maroon">x2</font> being    <a href="subset_1.html#M2">Element</a> of <span class="p1"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font></span><a href="domain_1.html#K6">}</a></span><b> such that </b><br/><a NAME="E3:85_1_1"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K1">[</a><span class="default"><font color="Maroon">x1</font>,<font color="Maroon">x2</font></span><a href="domain_1.html#K1">]</a></span>
 <b>by </b><i><a class="ref" href="domain_1.html#T9">DOMAIN_1:9</a></i>;<br/><b>take </b>
<font color="Maroon">x1</font>
;<br/><b>take </b>
the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font>
;<br/><b>thus </b><a NAME="E4:85_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K1">[</a><span class="default"><font color="Maroon">x1</font>,the <a href="turing_1.html#U4" target="_self">InitS</a> of <font color="Maroon">t</font></span><a href="domain_1.html#K1">]</a></span>
 <b>by </b><i>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="85_1_2"><b>suppose </b></a><a NAME="E1:85_1_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p2"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font></span><a href="domain_1.html#K6">}</a></span>,the <a href="turing_1.html#U2" target="_self">States</a> of <font color="Maroon">t</font></span><a href="zfmisc_1.html#K2">:]</a></span>
 ;<br/><div class="add"><b>then consider </b><font color="Maroon">x1</font> being    <a href="subset_1.html#M2">Element</a> of <span class="p1"><a href="domain_1.html#K6">{</a><span class="default">the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font></span><a href="domain_1.html#K6">}</a></span>, <font color="Maroon">x2</font> being   <a href="turing_1.html#NM1">State</a> of <font color="Maroon">t</font><b> such that </b><br/><a NAME="E3:85_1_2"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K1">[</a><span class="default"><font color="Maroon">x1</font>,<font color="Maroon">x2</font></span><a href="domain_1.html#K1">]</a></span>
 <b>by </b><i><a class="ref" href="domain_1.html#T9">DOMAIN_1:9</a></i>;<br/><b>take </b>
the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font>
;<br/><b>take </b>
<font color="Maroon">x2</font>
;<br/><b>thus </b><a NAME="E4:85_1_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K1">[</a><span class="default">the <a href="turing_1.html#U5" target="_self">AcceptS</a> of <font color="Maroon">s</font>,<font color="Maroon">x2</font></span><a href="domain_1.html#K1">]</a></span>
 <b>by </b><i>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div>

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