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 for <font color="Olive" title="b1">x</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds  <font color="Maroon" title="c1">seq</font> <a href="nat_1.html#K8" title="NAT_1:func.8">.</a> <font color="Olive" title="b1">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> 
 
;<br/>
<span class="kw">hence </span><a NAME="E2:31_1_1"/>
 <a href="comseq_3.html#K11" title="COMSEQ_3:func.11">Sum</a> <font color="Maroon" title="c1">seq</font> is  <a href="ordinal1.html#V8" title="ORDINAL1:attr.8">zero</a> 
 <span class="kw">by</span> <span class="lab"><a class="ref" href="csspace.html#T80" onmouseover="rs('csspace/T80')" onmouseout="rh()">CSSPACE:80</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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