ble memory may preclude the ability to
store this number of N**2 arrays in global memory.  The user may then
specify the number of Fock matrices to be used in the extrapolation
(must be greater than three (3) to be effective).  To set the number of
Fock matrices stored and used in the extrapolation procedure to 3
would take the form,
<PRE>
  CONVERGENCE diis 3
</PRE>

<P>
The user has the ability to simply turn off any optimization
procedures deemed undesirable with the obvious keywords,
<PRE>
  CONVERGENCE