FLUX_CALC SOLVE_BAND_ONE_GAS SOLVE_BAND_CLR_FESFT SOLVE_BAND_FESFT SOLVE_BAND_K_EQV SOLVE_BAND_K_EQV SOLVE_BAND_K_EQV SOLVE_BAND_K_EQV SOLVE_BAND_K_EQV SOLVE_BAND_K_EQV SOLVE_BAND_RANDOM_OVERLAP SOLVE_BAND_RANDOM_OVERLAP SOLVE_BAND_RANDOM_OVERLAP