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<b>thus </b>5 = 
 <a href="ordinal1.html#K1" title="ORDINAL1:func.1">succ</a> 4

<br/>.= 
4 <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default">4</span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span>
<b>by </b><i><a class="ref" href="ordinal1.html#D1" title="ORDINAL1:def.1">ORDINAL1:def 1</a></i>
<br/>.= 
<span class="p1"><a href="enumset1.html#K3" title="ENUMSET1:func.3">{</a><span class="default">0,1,2,3,4</span><a href="enumset1.html#K3" title="ENUMSET1:func.3">}</a></span>
<b>by </b><i><a class="ref" href="card_1.html#T90" target="_self" title="CARD_1:th.90">Th90</a>, <a class="ref" href="enumset1.html#T50" title="ENUMSET1:th.50">ENUMSET1:50</a></i>
;<br/>


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