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<div><span class="kw">theorem </span><a NAME="T2"><span class="comment"><font color="firebrick">:: TEX_2:2</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being  1 <a href="card_1.html#V3" title="CARD_1:attr.3">-element</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">B</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st  not <font color="Olive" title="b1">A</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Olive" title="b2">B</font> is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  holds <br/><font color="Olive" title="b1">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Olive" title="b2">B</font></div></div>
