Perturbative approach to $f(R)$-gravitation in FLRW cosmology

Pham Van Ky, Nguyen Thi Hong Van, Nguyen Anh Ky

The $f(R)$ theory of gravitation developed perturbatively around the general theory of relativity with cosmological constant (the \text{$\Lambda$}CDM model) in a flat FLWR geometry is co…