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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E32">Th18</font></span>: <a NAME="T18"><span class="comment"><font color="firebrick">:: RINGCAT1:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">UN</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a><br/>  for <font color="Olive" title="b2">x</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="ringcat1.html#K9" title="RINGCAT1:func.9">RingObjects</a> <font color="Olive" title="b1">UN</font> holds  <font color="Olive" title="b2">x</font> is   <a href="algstr_0.html#V36" title="ALGSTR_0:attr.36">strict</a>  <a href="vectsp_1.html#NM3" title="VECTSP_1:NM.3">Ring</a></div></div>
