Variational derivatives of gravitational actions
Department of Physics, Faculty of Science and Letters, Niğde University, 51240, Niğde, Turkey
* e-mail: firstname.lastname@example.org
Accepted: 3 October 2013
Published online: 25 October 2013
A method of calculation for the constrained variational derivatives for gravitational actions in the pseudo-Riemannian case is proposed as a practical variant of the first-order formalism with constraints. The proposed method calculation is then used to derive the metric field equations for a generic f (R) model.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2013