Abstract
We previously reported on a recursive method to generate the expansion of the lattice Green function (LGF) of the d-dimensional face-centered cubic lattice (fcc). The method was used to generate many coefficients for and the corresponding linear differential equation has been obtained. In this paper, we show the strength and the limit of the method by producing the series and the corresponding linear differential equations for . The differential Galois groups of these linear differential equations are shown to be symplectic for and orthogonal for . The recursion relation naturally provides a two-dimensional array where only the coefficients correspond to the coefficients of the LGF of the -dimensional fcc. The coefficients are associated to -finite bivariate series annihilated by linear partial differential equations that we analyze.
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