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<div><span class="kw">theorem </span><a NAME="T25"><span class="comment"><font color="firebrick">:: COUNTERS:25</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   <a href="counters.html#V2" title="COUNTERS:attr.2">ext-natural-membered</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st (  for <font color="Olive" title="b2">N</font> being   <a href="counters.html#NM1" title="COUNTERS:NM.1">ExtNat</a> holds  <font color="Olive" title="b2">N</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Olive" title="b1">X</font> ) holds <br/><font color="Olive" title="b1">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="counters.html#K1" title="COUNTERS:func.1">ExtNAT</a> </div></div>
