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<i><font color="Green">E13</font></i>: 2 <a href="binarith.html#K5">-'</a> 1 = 
2 <a href="xcmplx_0.html#K6">-</a> 1
<b>by </b><i><a class="ref" href="binarith.html#T50">BINARITH:50</a></i>
<br/>.= 
1

;<br/>
<i><font color="Green">E14</font></i>: 4 <a href="binarith.html#K5">-'</a> 2 = 
4 <a href="xcmplx_0.html#K6">-</a> 2
<b>by </b><i><a class="ref" href="binarith.html#T50">BINARITH:50</a></i>
<br/>.= 
2

;<br/>
 <a href="catalan1.html#K1" target="_self">Catalan</a> 2 = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default">2 <a href="nat_1.html#K2">*</a> 2</span>)</span> <a href="binarith.html#K5">-'</a> 2</span>)</span> <a href="binom.html#K7">choose</a> <span class="p2">(<span class="default">2 <a href="binarith.html#K5">-'</a> 1</span>)</span></span>)</span> <a href="xcmplx_0.html#K7">/</a> 2

<br/>.= 
2 <a href="xcmplx_0.html#K7">/</a> 2
<b>by </b><i><a class="txt" href="catalan1.html#E1:13"><i><font color="Green">E13</font></i></a>, <a class="txt" href="catalan1.html#E2:13"><i><font color="Green">E14</font></i></a>, <a class="ref" href="newton.html#T33">NEWTON:33</a></i>
<br/>.= 
1

;<br/>
<b>hence </b><a NAME="E4:13"/>
 <a href="catalan1.html#K1" target="_self">Catalan</a> 2 <a href="hidden.html#R1">=</a> 1
 ;<br/>


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