- #1

jk22

- 729

- 24

The Einstein tensor is derived from the Ricci tensor and one property is that, like the stress-energy tensor, its covariant derivative shall vanish.

Since the covariant derivative of the metric vanishes it can be added to the EFE as ##+\Lambda g_{\mu\nu}##

But then we could add any power of the metric like ##+\Lambda_1 g_{\mu\rho}g^\rho_\nu## ?