Dynamical Cosmological Constant in R ³ Gravity

In this paper, we go through the famous f(R) theories of gravity, but keeping a peculiar one, namely R³ modification. Moreover, instead of a coordinate free cosmological parameter, we take it to be a function of time. Having all these stuff, we investigate the notions of standard cosmology model, in the context of R³ modification to general relativity, and in various regimes, we study the dynamical cosmological constant.