In most multiple-scattering programs, the calculation of the free Green function is a lengthy operation. A new computation scheme based on recurrence properties of the free Green-function matrix has been developed in the multiple-scattering theory. Compared to the use of the existing methods, we have observed that this determination is faster for large angular momenta. © 1995.
Manar, F., & Brouder, C. (1995). A fast free green function calculation in multiple-scattering theory. Physica B: Physics of Condensed Matter, 208–209(C), 79–80. https://doi.org/10.1016/0921-4526(94)00637-B