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<b>let </b><font color="Maroon">R</font> be   <a href="relat_1.html#NM1">Relation</a>;<br/>

<b>assume </b><a NAME="E1:15_3_1"/>
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">R</font> <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K4">INT</a> 
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="real_3.html#D1" target="_self">REAL_3:def 1</a><br/>

<b>hence </b><a NAME="E2:15_3_1"/>
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">R</font> <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K1">REAL</a> 
 <b>by </b><i><a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a>, <a class="ref" href="numbers.html#T15">NUMBERS:15</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="seq_1.html#D1">SEQ_1:def 1</a><br/>


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