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<div><span class="kw">theorem </span><a NAME="T65"><span class="comment"><font color="firebrick">:: MOEBIUS2:65</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">n</font> being   non  <a href="ordinal1.html#V8" title="ORDINAL1:attr.8">zero</a>  <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds <br/> (  <a href="moebius2.html#K10" title="MOEBIUS2:func.10">Divisors_Lattice</a> <font color="Olive" title="b1">n</font> is  <a href="lattices.html#V17" title="LATTICES:attr.17">Boolean</a>  iff <font color="Olive" title="b1">n</font> is  <a href="moebius1.html#NV2" title="MOEBIUS1:NV.2">square-free</a>  )</div></div>
