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<div><span class="kw">theorem </span><a NAME="T36"><span class="comment"><font color="firebrick">:: CARDFIL2:36</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   non  <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">B</font> being   <a href="cardfil2.html#NM2" title="CARDFIL2:NM.2">filter_base</a> of <font color="Olive" title="b1">X</font>  st <font color="Olive" title="b2">B</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="cardfil2.html#K5" title="CARDFIL2:func.5">&lt;.</a><span class="default"><font color="Olive" title="b2">B</font></span><a href="cardfil2.html#K5" title="CARDFIL2:func.5">.)</a></span> holds <br/><font color="Olive" title="b2">B</font> is    <a href="card_fil.html#M1" title="CARD_FIL:mode.1">Filter</a> of <font color="Olive" title="b1">X</font> ;<br/></div></div>
