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<div>:: <span class="kw">deftheorem </span>   defines <a href="eqrel_1.html#K1" title="EQREL_1:func.1">nabla</a> <a onclick="hs(this)" href="javascript:()">EQREL_1:def 1 : <br/></a><span> for <font color="Olive" title="b1">X</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="eqrel_1.html#K1" title="EQREL_1:func.1">nabla</a> <font color="Olive" title="b1">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><font color="Olive" title="b1">X</font>,<font color="Olive" title="b1">X</font></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span>;<br/></span></div>
