Elementary properties of an energy funct
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Donnelly, Robert A.; Parr, Robert G.
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Article
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1978
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American Institute of Physics
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English
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The HohenbergβKohn theorem implies the existence of an energy functional based solely on the first-order reduced density matrix of the ground state of an atomic or molecular system. Application of the variational principle for the functional EvM[Ξ³] generates a set of coupled Euler equations for the