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

 <a href="catalan1.html#K1" target="_self">Catalan</a> 1 = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default">2 <a href="nat_1.html#K2">*</a> 1</span>)</span> <a href="binarith.html#K3">-'</a> 2</span>)</span> <a href="newton.html#K9">choose</a> 0
<b>by </b><i><a class="ref" href="binarith.html#T51">BINARITH:51</a></i>
<br/>.= 
1
<b>by </b><i><a class="ref" href="binarith.html#T51">BINARITH:51</a>, <a class="ref" href="newton.html#T27">NEWTON:27</a></i>
;<br/>
<b>hence </b><a NAME="E2:12"/>
 <a href="catalan1.html#K1" target="_self">Catalan</a> 1 <a href="hidden.html#R1">=</a> 1
 ;<br/>


</div>
