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<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="7_1"><b>now </b></a><div class="add"><b>take </b><font color="Maroon">n</font> = 0;<br/><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:7_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <a href="xboole_0.html#K1">{}</a> 
 ;<br/><b>hence </b><a NAME="E2:7_1"/>
 ex <font color="Olive">t</font> being  <a href="finseq_1.html#NM1">FinSequence</a> st <br/>( <font color="Olive">t</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x</font> &amp;  <a href="finseq_1.html#K3">len</a> <font color="Olive">t</font> <a href="hidden.html#R1">=</a> <font color="Maroon">n</font> )
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E2:7"/>
 <a href="xboole_0.html#K1">{}</a>  is <a href="matrix_1.html#V1" target="_self">tabular</a>
 <b>by </b><i/>;<br/>


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