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

<b>take </b>
 <a href="relat_1.html#K6">id</a> <span class="p1">(<span class="default"><a href="relat_1.html#K3">field</a> <font color="Maroon">R</font></span>)</span>
; <i><font color="Red">:: according to </font></i><a class="ref" href="wellord1.html#D8" target="_self">WELLORD1:def 8</a><br/>

<b>thus </b><a NAME="E1:47"/>
 <a href="relat_1.html#K6">id</a> <span class="p1">(<span class="default"><a href="relat_1.html#K3">field</a> <font color="Maroon">R</font></span>)</span> <a href="wellord1.html#R3" target="_self">is_isomorphism_of</a> <font color="Maroon">R</font>,<font color="Maroon">R</font>
 <b>by </b><i/>;<br/>


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