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<div>:: <span class="kw">deftheorem </span>   defines <a href="card_3.html#K3" title="CARD_3:func.3">Union</a> <a onclick="hs(this)" href="javascript:()">CARD_3:def 4 : <br/></a><span> for <font color="Olive" title="b1">f</font> being   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a> holds   <a href="card_3.html#K3" title="CARD_3:func.3">Union</a> <font color="Olive" title="b1">f</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="tarski.html#K3" title="TARSKI:func.3">union</a> <span class="p1">(<span class="default"><a href="xtuple_0.html#K10" title="XTUPLE_0:func.10">rng</a> <font color="Olive" title="b1">f</font></span>)</span>;<br/></span></div>
