ge-correlation <I>potential</I> that
has the correct <IMG
 WIDTH="40" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
 SRC="img111.gif"
 ALT="$-1/r$"> asymptotic behavior.  The total energy will be computed by the 
<code>XC</code> definition of exchange-correlation functional.  This scheme is known to
tend to overcorrect the deficiency of most uncorrected exchange-correlation potentials.

<P>
The keyword <code>CS00</code>, when supplied with a real value of shift (in atomic units),
will perform Casida-Salahub '00 asy