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We present results of variational calculations for the jellium model of metal surfaces. The ground-state wave function is represented by a product of local one- and two-body functions and a model Slater function. The correlation functions and the single-particle orbitals entering the Slater determinant are calculated by an unconstrained optimization procedure. Results for the surface energy and the work function are somewhat higher than previously published values.
Krotscheck et al. (Fri,) studied this question.