# From SR to GR in an easy math (and physical) way

1. Sep 8, 2006

### lokofer

From SR to GR in an "easy" math (and physical) way

Hello..i know that for example to go from Newtonian to SR you take:

$$\frac{du}{ds}=0 \rightarrow \nabla _{u} u=0$$

My question is ¿is there an "easy" form to go from SR to GR in the form:

$$\nabla _{u} u=0 \rightarrow \nabla R_{ab} =0$$
Or to get Einstein equation appart from using the Lagrangian formalism... using "Differential Geomertry" or similar...

2. Sep 8, 2006

### robphy

Your first claim doesn't make much sense to me. Can you clarify?
Are you trying to describe the evolution of the universe as a geodesic in some abstract space?