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<b>defpred </b><font color="Maroon">S<sub>1</sub></font>[   <a href="hidden.html#M1">set</a> ] <b>means </b><font color="Maroon">a<sub>1</sub></font> is   <a href="toler_1.html#NM2">TolClass</a> of <font color="Maroon">T</font>;<br/>
<b>let </b><font color="Maroon">C1</font> be    <a href="hidden.html#M1">set</a> , <font color="Maroon">C2</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:47_2_2"/><i><font color="Green">E38</font></i>: 
for <font color="Olive">Y</font> being   <a href="hidden.html#M1">set</a>  holds <br/> ( <font color="Olive">Y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">C1</font> iff <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">Y</font>] )
 <b>and </b><br/><a NAME="E2:47_2_2"/><i><font color="Green">E40</font></i>: 
for <font color="Olive">Y</font> being   <a href="hidden.html#M1">set</a>  holds <br/> ( <font color="Olive">Y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">C2</font> iff <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">Y</font>] )
 ;<br/>

<a NAME="E3:47_2_2"/>
<font color="Maroon">C1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">C2</font>
 
<b>from </b><i><a class="ref" href="xboole_0.html#S2">XBOOLE_0:sch 2</a>(, <a class="ref" href="toler_1.html#T15" target="_self">Th15</a>);<br/></i>
<b>hence </b><a NAME="E4:47_2_2"/>
<font color="Maroon">C1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">C2</font>
 ;<br/>


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