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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be    <a href="fraenkel.html#M2">Element</a> of  <a href="autalg_1.html#K1" target="_self">UAAut</a> <font color="Maroon">c<sub>1</sub></font>;<br/>



<a NAME="E1:7"/><i><font color="Green">E6</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="alg_1.html#R4">is_isomorphism</a> <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="autalg_1.html#D1" target="_self">Def1</a></i>;<br/>
<a NAME="E2:7"/><b>then </b>
<font color="Maroon">c<sub>2</sub></font> <a href="funct_1.html#K2">"</a>  is   <a href="struct_0.html#NM7">Function</a> of <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="txt" href="autalg_1.html#E7"><i><font color="Green">Lemma4</font></i></a></i>;<br/>
<b>then consider </b><font color="Maroon">c<sub>3</sub></font> being   <a href="struct_0.html#NM7">Function</a> of <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E4:7"/><i><font color="Green">E7</font></i>: 
<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> <a href="funct_1.html#K2">"</a> 
 ;<br/>
<a NAME="E5:7"/>
<font color="Maroon">c<sub>3</sub></font> <a href="alg_1.html#R4">is_isomorphism</a> <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="txt" href="autalg_1.html#E1:7"><i><font color="Green">E6</font></i></a>, <a class="txt" href="autalg_1.html#E4:7"><i><font color="Green">E7</font></i></a>, <a class="ref" href="alg_1.html#T11">ALG_1:11</a></i>;<br/>
<b>hence </b><a NAME="E6:7"/>
<font color="Maroon">c<sub>2</sub></font> <a href="funct_1.html#K2">"</a>  <a href="hidden.html#R2">in</a>  <a href="autalg_1.html#K1" target="_self">UAAut</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="txt" href="autalg_1.html#E4:7"><i><font color="Green">E7</font></i></a>, <a class="ref" href="autalg_1.html#D1" target="_self">Def1</a></i>;<br/>


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