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<div>:: <span class="kw">deftheorem </span>   defines <a href="nat_lat.html#K4" title="NAT_LAT:func.4">0_NN</a> <a onclick="hs(this)" href="javascript:()">NAT_LAT:def 4 : <br/></a><span> <a href="nat_lat.html#K4" title="NAT_LAT:func.4">0_NN</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1;<br/></span></div>
