Hi guys,
In the ppf module, written by Wenjuan, Wayne and Antony, it seems that we still need to model functions f_G_ppf, g_ppf and f_zeta_ppf by ourself. Forms of the three functions seem different in the different modified gravity models, such as f(R), DGP and scalar-tensor theory. If my understanding is correct, how can we check our proposal on the three functions are self-consistently?
Best,
Bin