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<div><span class="kw">theorem </span><a NAME="T12"><span class="comment"><font color="firebrick">:: BINARI_6:12</font></span><br/></a><div class="add"> <a href="binari_6.html#K2" title="BINARI_6:func.2">Nat2BL</a>  is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a> </div></div>
