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<div><span class="kw">theorem </span><a NAME="T204"><span class="comment"><font color="firebrick">:: GROUP_1A:204</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">G</font> being   <a href="group_1a.html#NM1" title="GROUP_1A:NM.1">addGroup</a> holds   <a href="group_1a.html#K11" title="GROUP_1A:func.11">(0).</a> <font color="Olive" title="b1">G</font> is  <a href="rlvect_1.html#V2" title="RLVECT_1:attr.2">Abelian</a> </div></div>
