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<b>let </b><font color="Maroon">f</font> be  <a href="comput_1.html#V4" target="_self">homogeneous</a> <a href="funct_1.html#NM1">Function</a>;<br/>

<b>assume </b><a NAME="E1:142_3_1"/>
 <a href="comput_1.html#K3" target="_self">arity</a> <font color="Maroon">f</font> <a href="hidden.html#R1">=</a> 3
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="comput_1.html#D27" target="_self">COMPUT_1:def 27</a><br/>

<a NAME="E2:142_3_1"/><b>then </b>
 ex <font color="Olive">x</font> being  <a href="finseq_1.html#NM1">FinSequence</a> st <font color="Olive">x</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K1">dom</a> <font color="Maroon">f</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:142_3_1"/>
not <font color="Maroon">f</font> is <a href="xboole_0.html#V1">empty</a>
 <b>by </b><i><a class="ref" href="relat_1.html#T60">RELAT_1:60</a></i>;<br/>


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