<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">f</font> be  <a href="comput_1.html#V4" target="_self">homogeneous</a> <a href="relat_1.html#NM1">Relation</a>;<br/>

<b>assume </b><a NAME="E1:42"/>
 <a href="relat_1.html#K1">dom</a> <font color="Maroon">f</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>
 ;<br/>

<a NAME="E2:42"/><b>then </b>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K1">dom</a> <font color="Maroon">f</font>
 
<b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<b>hence </b> <a href="comput_1.html#K3" target="_self">arity</a> <font color="Maroon">f</font> = 
 <a href="finseq_1.html#K3">len</a> <a href="xboole_0.html#K1">{}</a> 
<b>by </b><i/>
<br/>.= 
0
<b>by </b><i><a class="ref" href="finseq_1.html#T25">FINSEQ_1:25</a></i>
;<br/><br/>


</div>
