BASIS SET OPTIMIZATION--HOW?



 1998 June 15
 Hello,
 Could someone please outline (just outline) how the ab initio basis sets
 of popular programs like Gaussian are optimized nowadays (best alphas and
 contraction coefficients): are these varied for a set of small molecules till
 the values which give the lowest energies are found? Or are they optimized for
 *atoms* ?
   Thanks
        E. Lewars
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