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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E35">Th60</font></span>: <a NAME="T21"><span class="comment"><font color="firebrick">:: PROOFS_1:21</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="proofs_1.html#V15" title="PROOFS_1:attr.15">finite-character</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   ex <font color="Olive" title="b2">Y</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Olive" title="b1">X</font> st <br/> for <font color="Olive" title="b3">Z</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Olive" title="b1">X</font>  holds  not <font color="Olive" title="b2">Y</font> <a href="xboole_0.html#R2" title="XBOOLE_0:pred.2">c&lt;</a> <font color="Olive" title="b3">Z</font></div></div>
