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<div><span class="kw">theorem </span><a NAME="T91"><span class="comment"><font color="firebrick">:: QUATERNI:91</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font>, <font color="Olive" title="b2">y</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a>  holds  <span class="p1"><a href="quaterni.html#K5" title="QUATERNI:func.5">[*</a><span class="default"><font color="Olive" title="b1">x</font>,<font color="Olive" title="b2">y</font>,<a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,<a href="numbers.html#K5" title="NUMBERS:func.5">0</a></span><a href="quaterni.html#K5" title="QUATERNI:func.5">*]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="arytm_0.html#K5" title="ARYTM_0:func.5">[*</a><span class="default"><font color="Olive" title="b1">x</font>,<font color="Olive" title="b2">y</font></span><a href="arytm_0.html#K5" title="ARYTM_0:func.5">*]</a></span> <span class="kw">by</span> <span class="lab"><a class="txt" href="quaterni.html#E14"><span class="lab"><font color="Green" title="E5">Lm3</font></span></a></span>;<br/></div></div>
