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<b>let </b><font color="Maroon">U1</font> be   <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/><b>let </b><font color="Maroon">U2</font> be   <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/><b>let </b><font color="Maroon">U3</font> be   <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/>





<b>assume </b><a NAME="E1:19"/><i><font color="Green">E33</font></i>: 
<font color="Maroon">U1</font>,<font color="Maroon">U2</font> <a href="alg_1.html#R5" target="_self">are_isomorphic</a> 
 ;<br/>

<b>assume </b><a NAME="E2:19"/><i><font color="Green">E34</font></i>: 
<font color="Maroon">U2</font>,<font color="Maroon">U3</font> <a href="alg_1.html#R5" target="_self">are_isomorphic</a> 
 ;<br/>

<b>consider </b><font color="Maroon">f</font> being   <a href="struct_0.html#NM6">Function</a> of <font color="Maroon">U1</font>,<font color="Maroon">U2</font><b> such that </b><br/><a NAME="E4:19"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">f</font> <a href="alg_1.html#R4" target="_self">is_isomorphism</a> <font color="Maroon">U1</font>,<font color="Maroon">U2</font>
 <b>by </b><i>, </i>;<br/>
<b>consider </b><font color="Maroon">g</font> being   <a href="struct_0.html#NM6">Function</a> of <font color="Maroon">U2</font>,<font color="Maroon">U3</font><b> such that </b><br/><a NAME="E6:19"/><i><font color="Green">E41</font></i>: 
<font color="Maroon">g</font> <a href="alg_1.html#R4" target="_self">is_isomorphism</a> <font color="Maroon">U2</font>,<font color="Maroon">U3</font>
 <b>by </b><i>, </i>;<br/>
<a NAME="E7:19"/>
<font color="Maroon">g</font> <a href="partfun1.html#K1">*</a> <font color="Maroon">f</font> <a href="alg_1.html#R4" target="_self">is_isomorphism</a> <font color="Maroon">U1</font>,<font color="Maroon">U3</font>
 
<b>by </b><i>, , </i>;<br/>
<b>hence </b><a NAME="E8:19"/>
<font color="Maroon">U1</font>,<font color="Maroon">U3</font> <a href="alg_1.html#R5" target="_self">are_isomorphic</a> 
 <b>by </b><i/>;<br/>


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