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<div><span class="kw">theorem </span><a NAME="T48"><span class="comment"><font color="firebrick">:: QUATERNI:48</font></span><br/></a><div class="add">(  <a href="quaterni.html#K12" title="QUATERNI:func.12">Rea</a> <span class="p1">(<span class="default"><a href="xcmplx_0.html#K1" title="XCMPLX_0:func.1">&lt;i&gt;</a> <a href="quaterni.html#K26" title="QUATERNI:func.26">*'</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  &amp;  <a href="quaterni.html#K13" title="QUATERNI:func.13">Im1</a> <span class="p1">(<span class="default"><a href="xcmplx_0.html#K1" title="XCMPLX_0:func.1">&lt;i&gt;</a> <a href="quaterni.html#K26" title="QUATERNI:func.26">*'</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> 1 &amp;  <a href="quaterni.html#K14" title="QUATERNI:func.14">Im2</a> <span class="p1">(<span class="default"><a href="xcmplx_0.html#K1" title="XCMPLX_0:func.1">&lt;i&gt;</a> <a href="quaterni.html#K26" title="QUATERNI:func.26">*'</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  &amp;  <a href="quaterni.html#K15" title="QUATERNI:func.15">Im3</a> <span class="p1">(<span class="default"><a href="xcmplx_0.html#K1" title="XCMPLX_0:func.1">&lt;i&gt;</a> <a href="quaterni.html#K26" title="QUATERNI:func.26">*'</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  )</div></div>
