Abstract
Extensions of previous methods for obtaining two- and three-body dispersion coefficients are presented. Many-dimensional arrays in inner projections are utilized. The required matrix elements are expressed in terms of atomic frequency (Cauchy) moments. Approximate dynamic polarizabilities are derived using generalized inner projections, and a number of theorems for definite operators are extended to more general cases. Numerical results for both two- and three-body dispersion coefficients are reported.
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