- #1
Klaus_Hoffmann
- 86
- 1
if we have the Einstein Hilbert action
[tex] I= \int_{V} dV (-g)^{1/2}R [/tex] or [tex] I= \int_{V} dV \mathcal L (g_{ab}, \Gamma_{kl}^{i} [/tex]
then my question is if we can obtain Einstein equations by varying the metric and Christofell symbols independently i mean you get Einstein Field equations by
[tex] \frac{\delta I}{\delta g_{ab} =0 [/tex] [tex] \frac{\delta I}{\delta \Gamma_{kl}^{i} =0 [/tex]
i mean , you consider the metric g_{ab} and [tex] \Gamma_{kl}^{i} [/tex] as independent variables for your theory.
[tex] I= \int_{V} dV (-g)^{1/2}R [/tex] or [tex] I= \int_{V} dV \mathcal L (g_{ab}, \Gamma_{kl}^{i} [/tex]
then my question is if we can obtain Einstein equations by varying the metric and Christofell symbols independently i mean you get Einstein Field equations by
[tex] \frac{\delta I}{\delta g_{ab} =0 [/tex] [tex] \frac{\delta I}{\delta \Gamma_{kl}^{i} =0 [/tex]
i mean , you consider the metric g_{ab} and [tex] \Gamma_{kl}^{i} [/tex] as independent variables for your theory.