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<b>consider </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> being  non <a href="xboole_0.html#V1">empty</a> <a href="finset_1.html#V1">finite</a>  <a href="hidden.html#M1">set</a> ;<br/>
<b>take </b><font color="Maroon">c<sub>3</sub></font> =  <a href="partfun1.html#K4">PFuncs</a> <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>2</sub></font>;<br/>

<b>thus </b><a NAME="E2:8_1_1"/>
<font color="Maroon">c<sub>3</sub></font> is <a href="fraenkel.html#V1">functional</a>
 ;<br/>

<b>thus </b><a NAME="E3:8_1_1"/>
<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="heyting2.html#T5" target="_self">Th5</a></i>;<br/>

<b>thus </b><a NAME="E4:8_1_1"/>
not <font color="Maroon">c<sub>3</sub></font> is <a href="xboole_0.html#V1">empty</a>
 ;<br/>


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