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<div><span class="kw">theorem </span><a NAME="T72"><span class="comment"><font color="firebrick">:: FUNCT_8:72</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being   <a href="funct_8.html#V1" title="FUNCT_8:attr.1">symmetrical</a>  <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a>  st <font color="Olive" title="b1">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1"><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">[.</a><span class="default"><span class="p2">(<span class="default"><a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> 1</span>)</span>,1</span><a href="rcomp_1.html#K1" title="RCOMP_1:func.1">.]</a></span> holds <br/> <a href="sin_cos9.html#K1" title="SIN_COS9:func.1">arctan</a>  <a href="funct_8.html#R2" title="FUNCT_8:pred.2">is_odd_on</a> <font color="Olive" title="b1">A</font></div></div>
