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<div><span class="kw">theorem </span><a NAME="T12"><span class="comment"><font color="firebrick">:: BCIIDEAL:12</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   <a href="bcialg_1.html#V13" title="BCIALG_1:attr.13">associative</a>  <a href="bcialg_1.html#NM1" title="BCIALG_1:NM.1">BCI-algebra</a><br/>  for <font color="Olive" title="b2">A</font> being    <a href="bcialg_1.html#M2" title="BCIALG_1:mode.2">Ideal</a> of <font color="Olive" title="b1">X</font> holds  <font color="Olive" title="b2">A</font> is  <a href="bcialg_1.html#V12" title="BCIALG_1:attr.12">closed</a> </div></div>
