I Inverting the metric coefficients in the Schwarzschild line element

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The discussion revolves around the manipulation of the Schwarzschild line element and the implications of inverting metric coefficients. The original poster is attempting to derive new metric coefficients but encounters discrepancies in the Einstein tensor components, particularly with the ##G_{tt}## term. Participants emphasize the importance of understanding the difference between covariant and contravariant tensor notations, as well as the proper methods for raising and lowering indices. It is suggested that the poster may have arithmetic errors and a lack of foundational knowledge in tensor calculus, which is crucial for resolving the issues presented. Overall, the conversation highlights the need for a solid grasp of differential geometry principles to reconcile the calculations accurately.
  • #31
Bishal Banjara said:
"I want to know whether I am doing wrong though metric is independent to the final result or it doesn't reconcile, naturally", what should we be concluded?

I'm not sure what you're asking.

If you're asking whether what you did in the OP of this thread is correct, I have already said that it's wrong, and explained why. See my posts #10 and #11.

If you are asking whether you can obtain the inverse metric ##g^{\alpha \beta}## by raising both indexes on the metric ##g_{\alpha \beta}##, it should be obvious that you can't, since in order to raise indexes you need to already know the inverse metric ##g^{\alpha \beta}##. You obtain the inverse metric by considering the metric as a matrix and obtaining its matrix inverse.
 
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  • #32
PeterDonis said:
I'm not sure what you're asking.

If you're asking whether what you did in the OP of this thread is correct, I have already said that it's wrong, and explained why. See my posts #10 and #11.

If you are asking whether you can obtain the inverse metric ##g^{\alpha \beta}## by raising both indexes on the metric ##g_{\alpha \beta}##, it should be obvious that you can't, since in order to raise indexes you need to already know the inverse metric ##g^{\alpha \beta}##. You obtain the inverse metric by considering the metric as a matrix and obtaining its matrix inverse.
The only way I could make my question very simple, be like, what if inverting the metric coefficients ##g_{oo}## and ##g_{rr}## of the usual Schwarzschild solution for the final result calculation of Einstein's tensor components ##G_{oo}## and ##G_{rr}##? Does this final result after inverting the metrics coincide to the initial result of the original Schwarzschild solution?
 
  • #33
Bishal Banjara said:
inverting the metric coefficients ##g_{oo}## and ##g_{rr}##

Is a meaningless, wrong thing to do. It makes no sense.

Bishal Banjara said:
Does this final result after inverting the metrics coincide to the initial result of the original Schwarzschild solution?

No. It is just nonsense. See above.
 

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