
<BR>
11.9 <TT>GRID</TT> -- Numerical Integration of the XC Potential
</H1>
<PRE>
  GRID [(xcoarse||coarse||medium||fine||xfine) default medium] \
       [(gausleg||lebedev ) default lebedev ] \
       [(becke||erf1||erf2||ssf) default erf1] \
       [(euler||mura||treutler) default mura] \
       [rm &lt;real rm default 2.0&gt;] \
       [nodisk]
</PRE>

<P>
A numerical integration is necessary for the evaluation of the
exchange-correlation contribution to the density functional.  The
default quadrature us