Talk:Hybrid functional

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[edit] Semiempirical hybrids?

Are there semiempirical hybrid functionals? Having just written the article and looked in the Gaussian manual list, I'm not so sure. Maybe it doesn't make sense since you set the parameters in an empirical sense. WilliamDParker 16:03, 28 March 2007 (UTC)

Having recently reviewed some of Perdew's articles [1] [2], it turns out that LYP correlation is empirical in that it is fit with four parameters, and any mixing of Hartree-Fock exchange with more than one paramters is semiempirical because it is fit to some set of experimental outcomes WilliamDParker 20:17, 7 May 2007 (UTC)