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<div><span class="kw">theorem </span><a NAME="T94"><span class="comment"><font color="firebrick">:: CARD_3:94</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font>, <font color="Olive" title="b2">Y</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st <font color="Olive" title="b1">X</font> is  <a href="card_3.html#V4" title="CARD_3:attr.4">countable</a>  holds <br/><font color="Olive" title="b1">X</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Olive" title="b2">Y</font> is  <a href="card_3.html#V4" title="CARD_3:attr.4">countable</a>  <span class="kw">by</span> <span class="lab"><a class="txt" href="card_3.html#E111"><span class="lab"><font color="Green" title="E58">Lm3</font></span></a>, <a class="ref" href="xboole_1.html#T17" onmouseover="rs('xboole_1/T17')" onmouseout="rh()">XBOOLE_1:17</a></span>;<br/></div></div>
