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<b>thus </b><a NAME="E1:10_1_1"/>
not  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>2</sub></font> is <a href="abian.html#V1">even</a>
 <b>by </b><i><a class="ref" href="glib_001.html#D3" target="_self">Def3</a></i>;<br/>

<a NAME="E2:10_1_1"/><b>then </b>
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0
 
<b>by </b><i><a class="ref" href="heyting3.html#T1">HEYTING3:1</a></i>;<br/>
<b>hence </b><a NAME="E3:10_1_1"/>
not  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>2</sub></font> is <a href="xboole_0.html#V1">empty</a>
 ;<br/>


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