I have read that article, and others like it but still do not understand the reasoning. I can recover the Einstein equations but the second equation (#3 in the article that was posted \nabla_\lambda(\sqrt{-g}f'(R)g^{\mu\nu})=0) , the one obtained by varying with respect to the connect, still...
Hey all, making my way through Landau and Lifgarbagez classical theory of fields and i had a specific question on the Einstein equations. Following the palatini approach, we assume that the connection and metric are independent variables and are not related a priori. In the footnote, they say...