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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E19">Th21</font></span>: <a NAME="T21"><span class="comment"><font color="firebrick">:: MIDSP_3:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds  1 is    <a href="midsp_3.html#M1" title="MIDSP_3:mode.1">Nat</a> of <font color="Olive" title="b1">n</font></div></div>
