 [nodamping] [nodiis] [nolevelshifting]
</PRE>

<P>
For systems where the initial guess is very poor, the user can try the
method described in
<A NAME="tex2html33"
  HREF="footnode.html#foot3432"><SUP>11.5</SUP></A>that makes use of <B>fractional occupation</B> of the orbital levels during
the initial cycles of the SCF convergence. The input has the following form

<P>
<PRE>
  CONVERGENCE rabuck [n_rabuck &lt;integer n_rabuck default 25&gt;]]
</PRE>

<P>
where the optional value <TT>n_rabuck</TT> determines