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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E10">Th4</font></span>: <a NAME="T10"><span class="comment"><font color="firebrick">:: QUATERNI:10</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">a</font>, <font color="Olive" title="b2">b</font>, <font color="Olive" title="b3">c</font>, <font color="Olive" title="b4">d</font> being   <a href="xreal_0.html#NM1" title="XREAL_0:NM.1">Real</a>  holds  not (<a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,1,2,3) <a href="funct_4.html#K12" title="FUNCT_4:func.12">--&gt;</a> (<font color="Olive" title="b1">a</font>,<font color="Olive" title="b2">b</font>,<font color="Olive" title="b3">c</font>,<font color="Olive" title="b4">d</font>) <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a> </div></div>
