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<div>:: <span class="kw">deftheorem </span>   defines <a href="orders_1.html#K1" title="ORDERS_1:func.1">BOOL</a> <a onclick="hs(this)" href="javascript:()">ORDERS_1:def 3 : <br/></a><span> for <font color="Olive" title="b1">D</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="orders_1.html#K1" title="ORDERS_1:func.1">BOOL</a> <font color="Olive" title="b1">D</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="setfam_1.html#K9" title="SETFAM_1:func.9">bool</a> <font color="Olive" title="b1">D</font></span>)</span> <a href="subset_1.html#K7" title="SUBSET_1:func.7">\</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span>;<br/></span></div>
