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<div><span class="kw">theorem </span><a NAME="T9"><span class="comment"><font color="firebrick">:: COUNTERS:9</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">N</font> being   <a href="counters.html#NM1" title="COUNTERS:NM.1">ExtNat</a>  holds <br/>( <font color="Olive" title="b1">N</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  or  ex <font color="Olive" title="b2">K</font> being   <a href="counters.html#NM1" title="COUNTERS:NM.1">ExtNat</a> st <font color="Olive" title="b1">N</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">K</font> <a href="xxreal_3.html#K1" title="XXREAL_3:func.1">+</a> 1 )</div></div>
