<P>
Any combination of the supported correlation functional options can be
used.  For example  B3LYP could be specified as:
<PRE>
XC vwn_1_rpa 0.19 lyp 0.81 HFexch 0.20  slater 0.80 becke88 nonlocal 0.72
</PRE>

<P>

<H2><A NAME="SECTION001332000000000000000">
11.3.2 Combined Exchange and Correlation Functionals</A>
</H2>

<P>
In addition to the options listed above for the exchange and correlation
functionals, the user has the alternative of specifying combined exchange and 
correlation functionals. A comp