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<div><span class="kw">theorem </span><a NAME="T88"><span class="comment"><font color="firebrick">:: GROUP_24:88</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being   <a href="group_1.html#NM1" title="GROUP_1:NM.1">Group</a>  st <font color="Olive" title="b1">A</font> is  <a href="group_1.html#V5" title="GROUP_1:attr.5">commutative</a>  holds <br/> <a href="group_1.html#K3" title="GROUP_1:func.3">inverse_op</a> <font color="Olive" title="b1">A</font> is   <a href="group_22.html#NM2" title="GROUP_22:NM.2">Automorphism</a> of <font color="Olive" title="b1">A</font> ;<br/></div></div>
