- #1
Woolyabyss
- 143
- 1
- Homework Statement
- Show that the Riemann curvature tensor in 2d is given by ##R_{abcd} =\frac{R}{2}(g_{ac}g_{bd} - g_{ad}g_{bc}) ##
- Relevant Equations
- ## R = R_{ab} g^{ab} ## and ## R_{ab} = R_{acb}^{c}##
Since in 2D the riemman curvature tensor has only one independent component, ## R = R_{ab} g^{ab} ## can be reversed to get the riemmann curvature tensor.
Write
## R_{ab} = R g_{ab} ##
Now
## R g_{ab} = R_{acbd} g^{cd}##
Rewrite this as
## R_{acbd} = Rg_{ab} g_{cd} ##
My issue is I'm not sure how they caught a second term? Any help would be appreciated.
Write
## R_{ab} = R g_{ab} ##
Now
## R g_{ab} = R_{acbd} g^{cd}##
Rewrite this as
## R_{acbd} = Rg_{ab} g_{cd} ##
My issue is I'm not sure how they caught a second term? Any help would be appreciated.