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<a NAME="E1:50"/>
 <a href="ami_1.html#K7" target="_self">sproduct</a> <a href="xboole_0.html#K1">{}</a>  <a href="tarski.html#R1">c=</a>  <a href="partfun1.html#K4">PFuncs</a> <a href="xboole_0.html#K1">{}</a> ,<a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="ami_1.html#T31" target="_self">Th31</a>, <a class="ref" href="relat_1.html#T60">RELAT_1:60</a>, <a class="ref" href="zfmisc_1.html#T2">ZFMISC_1:2</a></i>;<br/>
<b>hence </b><a NAME="E2:50"/>
 <a href="ami_1.html#K7" target="_self">sproduct</a> <a href="xboole_0.html#K1">{}</a>  <a href="tarski.html#R1">c=</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>
 <b>by </b><i><a class="ref" href="partfun1.html#T122">PARTFUN1:122</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="xboole_0.html#D10">XBOOLE_0:def 10</a><br/>

<b>let </b><font color="Maroon">c<sub>1</sub></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="E3:50"/>
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>
 ;<br/>

<a NAME="E4:50"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<b>hence </b><a NAME="E5:50"/>
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R2">in</a>  <a href="ami_1.html#K7" target="_self">sproduct</a> <a href="xboole_0.html#K1">{}</a> 
 <b>by </b><i><a class="ref" href="ami_1.html#T26" target="_self">Th26</a></i>;<br/>


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