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<div><span class="kw">theorem </span><a NAME="T107"><span class="comment"><font color="firebrick">:: GROUP_24:107</font></span><br/></a><div class="add"> <a href="group_24.html#K6" title="GROUP_24:func.6">Dihedral_group</a> 2 is  <a href="group_1.html#V5" title="GROUP_1:attr.5">commutative</a> </div></div>
