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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="unialg_2.html#V2">with_const_op</a> <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be    <a href="unialg_2.html#M3">SubAlgebra</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>3</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/>





<b>assume </b><a NAME="E1:19"/><i><font color="Green">E10</font></i>: 
<font color="Maroon">c<sub>3</sub></font> is    <a href="struct_0.html#M1">Element</a> of  <a href="unialg_2.html#K6">Constants</a> <font color="Maroon">c<sub>1</sub></font>
 ;<br/>

<a NAME="E2:19"/>
 <a href="unialg_2.html#K6">Constants</a> <font color="Maroon">c<sub>1</sub></font> is   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">c<sub>2</sub></font>
 
<b>by </b><i><a class="ref" href="unialg_2.html#T18">UNIALG_2:18</a></i>;<br/>
<b>hence </b><a NAME="E3:19"/>
<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="txt" href="unialg_3.html#E1:19"><i><font color="Green">E10</font></i></a>, <a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>


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