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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E13">Th13</font></span>: <a NAME="T15"><span class="comment"><font color="firebrick">:: COMPLEX2:15</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">z</font> being   <a href="xcmplx_0.html#NM1" title="XCMPLX_0:NM.1">Complex</a> holds <br/> (  <a href="comptrig.html#K1" title="COMPTRIG:func.1">Arg</a> <font color="Olive" title="b1">z</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  iff <font color="Olive" title="b1">z</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><font color="Olive" title="b1">z</font></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span> )</div></div>
