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





<b>given </b><font color="Maroon">F</font> being   <a href="funct_1.html#NM1">Function</a><b> such that </b><a NAME="E1:51"/><i><font color="Green">E19</font></i>: 
<font color="Maroon">F</font> <a href="wellord1.html#R3" target="_self">is_isomorphism_of</a> <font color="Maroon">R</font>,<font color="Maroon">S</font>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="wellord1.html#D8" target="_self">WELLORD1:def 8</a><br/>

<b>given </b><font color="Maroon">G</font> being   <a href="funct_1.html#NM1">Function</a><b> such that </b><a NAME="E2:51"/><i><font color="Green">E20</font></i>: 
<font color="Maroon">G</font> <a href="wellord1.html#R3" target="_self">is_isomorphism_of</a> <font color="Maroon">S</font>,<font color="Maroon">T</font>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="wellord1.html#D8" target="_self">WELLORD1:def 8</a><br/>

<b>take </b>
<font color="Maroon">G</font> <a href="funct_1.html#NK3" target="_self">*</a> <font color="Maroon">F</font>
; <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="E3:51"/>
<font color="Maroon">G</font> <a href="funct_1.html#NK3" target="_self">*</a> <font color="Maroon">F</font> <a href="wellord1.html#R3" target="_self">is_isomorphism_of</a> <font color="Maroon">R</font>,<font color="Maroon">T</font>
 <b>by </b><i><a class="txt" href="wellord1.html#E29"><i><font color="Green">Lemma48</font></i></a>, <a class="ref" href="wellord1.html#T19" target="_self">Th19</a>, <a class="ref" href="wellord1.html#T17" target="_self">Th17</a></i>;<br/>


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