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Stability and Space Phase Analysis in f(R) theory with Generalized Exponential model

We have studied in this paper, the stability of dynamical system in $f(R)$ gravity. We have considered the $f(R)$ $γ$-gravity and explored its dynamical analysis. We found six critical points among which only one describes an universe fulled of both matter and dominated dark energy. It's shown that these critical points presents specific phase spaces described by the corresponding fluids. Furthermore, we've investigated the stability conditions of these critical points and find that theses conditions are dependent of the model parameters. We also study the stability of a new power-law $f_\ast(R)$ model with de Sitter and power law solutions.