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<div><span class="kw">theorem </span><a NAME="T9"><span class="comment"><font color="firebrick">:: QUATERN3:9</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">z1</font>, <font color="Olive" title="b2">z</font> being   <a href="quaterni.html#NM1" title="QUATERNI:NM.1">Quaternion</a>  st <font color="Olive" title="b2">z</font> is   <a href="xreal_0.html#NM1" title="XREAL_0:NM.1">Real</a> holds <br/><font color="Olive" title="b2">z</font> <a href="quaterni.html#K22" title="QUATERNI:func.22">*</a> <font color="Olive" title="b1">z1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">z1</font> <a href="quaterni.html#K22" title="QUATERNI:func.22">*</a> <font color="Olive" title="b2">z</font></div></div>
