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<b>let </b><font color="Maroon">aa</font> be    <a href="scmfsa_2.html#M1">Int-Location</a> ;<br/><b>let </b><font color="Maroon">bb</font> be    <a href="scmfsa_2.html#M1">Int-Location</a> ;<br/><b>let </b><font color="Maroon">f</font> be    <a href="scmfsa_2.html#M2">FinSeq-Location</a> ;<br/>





<b>set </b><font color="Maroon">a</font> = <font color="Maroon">aa</font>;<br/>
<b>set </b><font color="Maroon">b</font> = <font color="Maroon">bb</font>;<br/>
<b>set </b><font color="Maroon">aux1</font> = 1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span>;<br/>
<b>set </b><font color="Maroon">aux2</font> = 2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span>;<br/>
<b>set </b><font color="Maroon">i0</font> = <span class="p1">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font>;<br/>
<b>set </b><font color="Maroon">i1</font> = <span class="p1">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">bb</font>;<br/>
<b>set </b><font color="Maroon">i2</font> = <font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p1">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>;<br/>
<b>set </b><font color="Maroon">i3</font> = <font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p1">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>;<br/>
<i><font color="Green">E34</font></i>:  <a href="sf_mastr.html#K2">UsedIntLoc</a> <span class="p1">(<span class="default"><a href="sfmastr3.html#K5" target="_self">swap</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font>,<font color="Maroon">bb</font></span>)</span> = 
<span class="p1">(<span class="default"><a href="sf_mastr.html#K2">UsedIntLoc</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font></span>)</span> <a href="scmfsa6a.html#K7">';'</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">bb</font></span>)</span></span>)</span> <a href="scmfsa6a.html#K6">';'</a> <span class="p3">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T34">SF_MASTR:34</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="sf_mastr.html#K2">UsedIntLoc</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font></span>)</span> <a href="scmfsa6a.html#K7">';'</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">bb</font></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p2">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p3">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T34">SF_MASTR:34</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p3">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">bb</font></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p2">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p3">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T35">SF_MASTR:35</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span> <a href="xboole_0.html#K2">\/</a> <span class="p3">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p0"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="scmfsa_2.html#K16">:=</a> <font color="Maroon">f</font>,<font color="Maroon">bb</font></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p2">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p3">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T21">SF_MASTR:21</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p2">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p3">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">aa</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T21">SF_MASTR:21</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p3">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><a href="sf_mastr.html#K1">UsedIntLoc</a> <span class="p2">(<span class="default"><font color="Maroon">f</font>,<font color="Maroon">bb</font> <a href="scmfsa_2.html#K17">:=</a> <span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T21">SF_MASTR:21</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p4">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p5"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p3">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p2">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span>
<b>by </b><i><a class="ref" href="sf_mastr.html#T21">SF_MASTR:21</a></i>
;<br/>
<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E2:55"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span>
 ;<br/>

<div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="55_2"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:55_2"/>
( <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">aa</font> or <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">bb</font> )
 </span><b>by </b><i>, <a class="ref" href="tarski.html#D2">TARSKI:def 2</a></i>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="55_2_1"><b>suppose </b></a><a NAME="E1:55_2_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">aa</font>
 ;<br/><div class="add"><a NAME="E2:55_2_1"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p2">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span>
 <b>by </b><i><a class="ref" href="tarski.html#D2">TARSKI:def 2</a></i>;<br/><a NAME="E3:55_2_1"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p3">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p2"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p3">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p4"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p2">(<span class="default">2 <a href="sfmastr1.html#NK8" target="_self">-ndRWNotIn</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">aa</font></span><a href="sfmastr1.html#K2">}</a></span>
 <b>by </b><i><a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/><b>hence </b><a NAME="E4:55_2_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="sf_mastr.html#K2">UsedIntLoc</a> <span class="p1">(<span class="default"><a href="sfmastr3.html#K5" target="_self">swap</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font>,<font color="Maroon">bb</font></span>)</span>
 <b>by </b><i>, <a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="55_2_2"><b>suppose </b></a><a NAME="E1:55_2_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">bb</font>
 ;<br/><div class="add"><a NAME="E2:55_2_2"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="sfmastr1.html#K2">{</a><span class="default"><span class="p2">(<span class="default">1 <a href="sfmastr1.html#NK7" target="_self">-stRWNotIn</a> <span class="p3"><a href="sfmastr1.html#K2">{</a><span class="default"><font color="Maroon">aa</font>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span></span>)</span>,<font color="Maroon">bb</font></span><a href="sfmastr1.html#K2">}</a></span>
 <b>by </b><i><a class="ref" href="tarski.html#D2">TARSKI:def 2</a></i>;<br/><b>hence </b><a NAME="E3:55_2_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="sf_mastr.html#K2">UsedIntLoc</a> <span class="p1">(<span class="default"><a href="sfmastr3.html#K5" target="_self">swap</a> <font color="Maroon">f</font>,<font color="Maroon">aa</font>,<font color="Maroon">bb</font></span>)</span>
 <b>by </b><i>, <a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div>

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