This is a FORTRAN 90-based code that applies the Fluctuation Exchange Approximation (FLEX) to study superconductivity and magnetism in multiband tight-binding models.

To compile the code, please type the following in the src-flex/ subdirectory % make first-order (this produces a first-order perturbation theory code) % make second-order (this produces a second-order perturbation theory code) % make second-order-mpi (same as above, but with mpi extensions for parallel processing) % make third-order (this produes a third-order perturbation theory code) % make third-order-mpi (same as above, but with mpi extensions for parallel processing) % make flex (this produces a fluctuation exchange approximation code) % make flex-mpi (same as above, but with mpi extensions for parallel processing)