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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E8">lemmacardeven</font></span>: <a NAME="T17"><span class="comment"><font color="firebrick">:: NUMBER01:17</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>  st <font color="Olive" title="b1">n</font> is  <a href="abian.html#NV2" title="ABIAN:NV.2">odd</a>  holds <br/> <a href="card_1.html#K4" title="CARD_1:func.4">card</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <a href="fib_num2.html#K3" title="FIB_NUM2:func.3">EvenNAT</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="nat_d.html#K3" title="NAT_D:func.3">div</a> 2</span>)</span> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</div></div>
