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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E21">Th16</font></span>: <a NAME="T16"><span class="comment"><font color="firebrick">:: PELLS_EQ:16</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">D</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a>  st  not <font color="Olive" title="b1">D</font> is  <a href="pythtrip.html#V1" title="PYTHTRIP:attr.1">square</a>  holds <br/> ex <font color="Olive" title="b2">p</font> being    <a href="pells_eq.html#M1" title="PELLS_EQ:mode.1">Pell's_solution</a> of <font color="Olive" title="b1">D</font> st <font color="Olive" title="b2">p</font> is  <a href="pells_eq.html#V1" title="PELLS_EQ:attr.1">positive</a> </div></div>
