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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be   <a href="pre_topc.html#NM1">TopSpace</a>;<br/><b>let </b><font color="Maroon">c<sub>3</sub></font> be    <a href="cantor_1.html#M1">Basis</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>assume </b><a NAME="E1:43"/><i><font color="Green">E21</font></i>: 
( the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">c<sub>2</sub></font> &amp; <font color="Maroon">c<sub>3</sub></font> is    <a href="cantor_1.html#M1">Basis</a> of <font color="Maroon">c<sub>2</sub></font> )
 ;<br/>

<b>then reconsider </b><font color="Maroon">c<sub>4</sub></font> = <font color="Maroon">c<sub>3</sub></font> as    <a href="cantor_1.html#M1">Basis</a> of <font color="Maroon">c<sub>2</sub></font> ;<br/>
<b>thus </b>the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">c<sub>1</sub></font> = 
 <a href="cantor_1.html#K1">UniCl</a> <font color="Maroon">c<sub>4</sub></font>
<b>by </b><i><a class="txt" href="yellow_9.html#E1:43"><i><font color="Green">E21</font></i></a>, <a class="ref" href="yellow_9.html#T22" target="_self">Th22</a></i>
<br/>.= 
the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="ref" href="yellow_9.html#T22" target="_self">Th22</a></i>
;<br/>


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