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<b>let </b><font color="Maroon">F1</font> be   <a href="struct_0.html#NM3">Subset-Family</a> of <font color="Maroon">G</font>, <font color="Maroon">F2</font> be   <a href="struct_0.html#NM3">Subset-Family</a> of <font color="Maroon">G</font>;<br/>

<b>defpred </b><font color="Maroon">S<sub>1</sub></font>[   <a href="hidden.html#M1">set</a> ] <b>means </b> ex <font color="Olive">a</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G</font> st <font color="Maroon">a<sub>1</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">H</font> <a href="group_2.html#K13">*</a> <font color="Olive">a</font></span>)</span> <a href="group_2.html#K10">*</a> <font color="Maroon">K</font>;<br/>
<b>assume </b><a NAME="E1:17_1_2"/><i><font color="Green">E34</font></i>: 
for <font color="Olive">A</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">G</font> holds <br/> ( <font color="Olive">A</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F1</font> iff <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">A</font>] )
 ;<br/>

<b>assume </b><a NAME="E2:17_1_2"/><i><font color="Green">E40</font></i>: 
for <font color="Olive">A</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">G</font> holds <br/> ( <font color="Olive">A</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F2</font> iff <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">A</font>] )
 ;<br/>

<b>thus </b><a NAME="E3:17_1_2"/>
<font color="Maroon">F1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">F2</font>
 <b>from </b><i><a class="ref" href="subset_1.html#S4">SUBSET_1:sch 4</a>(, );</i><br/>


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