Generalized Misner-Sharp energy in $f(R,\mathcal{G})$ gravity

Amin Rezaei Akbarieh, Navid Safarzadeh Ilkhchi, Yaghoub Heydarzade

In this work, we explore the formulation of the Misner-Sharp energy within the framework of $f(R,\mathcal{G})$ gravity, a modified theory incorporating the Ricci scalar $R$ and th…