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<div><span class="kw">theorem </span><a NAME="T41"><span class="comment"><font color="firebrick">:: CARD_1:41</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">m</font>, <font color="Olive" title="b2">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds <br/> (  <a href="card_1.html#K1" title="CARD_1:func.1">card</a> <font color="Olive" title="b2">n</font> <a href="ordinal1.html#R1" title="ORDINAL1:pred.1">c=</a>  <a href="card_1.html#K1" title="CARD_1:func.1">card</a> <font color="Olive" title="b1">m</font> iff <font color="Olive" title="b2">n</font> <a href="ordinal1.html#R1" title="ORDINAL1:pred.1">c=</a> <font color="Olive" title="b1">m</font> ) ;<br/></div></div>
