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<div><span class="kw">theorem </span><a NAME="T49"><span class="comment"><font color="firebrick">:: CLASSES5:49</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">U</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="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds <br/> ( <font color="Olive" title="b2">x</font> is <font color="Olive" title="b1">U</font> <a href="classes5.html#V4" title="CLASSES5:attr.4">-petit</a>  iff  <a href="card_1.html#K1" title="CARD_1:func.1">card</a> <font color="Olive" title="b2">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="card_1.html#K1" title="CARD_1:func.1">card</a> <font color="Olive" title="b1">U</font> )</div></div>
