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158                                                   CHAPTER 19. HYBRIDS






       Chapter 19


       Hybrids



       19.1  Static, strong, and strict correlation

       19.2  Mixing exact exchange with GGA
       19.3  Questions about adiabatic connection formula and hybrids

        1. Does the Hellmann-Feynman theorem apply to the problem of the particle in a potential
          V (x) = exp(−|x|)?
        2. What happens to a system as λ → ∞?
                             λ
        3. What is the formula for v [n](r) in terms of a scaled density?
                             ext



























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