<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T31"><span class="comment"><font color="firebrick">:: MOEBIUS1:31</font></span><br/></a><div class="add"> <a href="moebius1.html#K2" title="MOEBIUS1:func.2">Moebius</a> 2 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> 1</div></div>
