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<div><span class="kw">theorem </span><a NAME="T22"><span class="comment"><font color="firebrick">:: GROUP_23:22</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">I</font> being   <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">F</font> being   <a href="group_7.html#NM1" title="GROUP_7:NM.1">multMagma-Family</a> of <font color="Olive" title="b1">I</font> holds   <a href="group_7.html#K2" title="GROUP_7:func.2">product</a> <font color="Olive" title="b2">F</font> is   <a href="struct_0.html#V7" title="STRUCT_0:attr.7">trivial</a>  <a href="group_1.html#NM1" title="GROUP_1:NM.1">Group</a></div></div>
