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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E84">Th81</font></span>: <a NAME="T81"><span class="comment"><font color="firebrick">:: NUMBER15:81</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 <br/>(  not <font color="Olive" title="b1">n</font> is  <a href="abian.html#NV2" title="ABIAN:NV.2">odd</a>  or <font color="Olive" title="b1">n</font>,1 <a href="int_1.html#R2" title="INT_1:pred.2">are_congruent_mod</a> 4 or <font color="Olive" title="b1">n</font>,3 <a href="int_1.html#R2" title="INT_1:pred.2">are_congruent_mod</a> 4 )</div></div>
