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<a NAME="E1:10_1_1"/>
 <a href="hallmar1.html#K1" target="_self">union</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> <a href="tarski.html#R1">c=</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="hallmar1.html#T3" target="_self">Th3</a></i>;<br/>
<b>hence </b><a NAME="E2:10_1_1"/>
 <a href="hallmar1.html#K1" target="_self">union</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> is <a href="finset_1.html#V1">finite</a>
 <b>by </b><i><a class="ref" href="finset_1.html#T13">FINSET_1:13</a></i>;<br/>


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