Re: CCL:collation of responses on ab initio/first principles

[Christoph van Wüllen <Christoph.vanWullen # - at - # tu-berlin.de>]

>  Even the integrals need NOT be evaluated EXACTLY for a method to be called
>  ab initio. For instance, Gaussian employs several asymptotic and other
>  cutoffs to approximate integral evaluation.
 This is only partly a valid argument.
Are sin(x), cos(x), exp(x) etc. calculated "analytically" on
 any
 computer? They are computed with similar methods, so erf(x) or F0(x)
 (or a two-electron integral) is as analytical as any other
 transcendental function.
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