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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E5">lem1</font></span>: <a NAME="T2"><span class="comment"><font color="firebrick">:: LAGRA4SQ:2</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">v</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds   <a href="lagra4sq.html#K2" title="LAGRA4SQ:func.2">LAG4SQf</a> <font color="Olive" title="b1">v</font> is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a> </div></div>
