Recent content by superbat

Thanks a lot PAllen

Hi, Does anyone have details about what Einstein at a higher level tried in his last 30 years when he was working on Unified field theory. What approaches he tried?

Thanks So do they have any physical significance or should I consider them as just mathematical tools

Ok Thanks Since you mention metric, I was also wondering what does contravariant version of metric mean. Covariant version of metric tells us about distance between 2 points. What does contravariant version of metric physically mean?

Thanks man I have read a lot about contra covariant but most texts articles I read fail to provide motivation behind the same. I was looking for that I will read article you shared anyways

1) I read different texts on Contravariant , Covariant vectors. 2) Contravariant - they say is like vector . Covariant is like gradient From what I see they have those vector spaces because it eventually helps get scalar out of it if we multiply contravariant by covariant Also Contravariant...

Ok Thanks a lot!

Thanks a lot man! So now if we take a very simple single planet hypothetical situation. How difficult will it be to come up with Riemann Ricci and Weyl tensors? if we assume simplest of conditions can we come up to a solution? Ricci Tensor - I want to see equations which are function of...

Ok, Let me ask this. Hypothetically spacetime is not empty. Only one planet exists and a vast empty universe. So at that those points where planet exists we have Rab−1/2Rgab=κTab. I want to know does the Ricci Tensor become zero at places other than where planet exists? And does Weyl tensor not...

Hey Thanks a lot for your reply. I was thinking in terms of Rab(x0,y0,z0,t0) -1/2R(x0,y0,z0,t0)gab(x0,y0,z0,t0) = Tab(x0,y0,z0,t0) . So basically even if energy momentum tensor exists at x0,y0,z0,t0 it will create curvature at that point (sat Earth) but Weyl curvature coming out of this (since...

Can someone explain mathematically why do we say Riemann Curvature Tensor has all the information about curvature of Space Thank You

I read Weyl tensor helps on propagating gravitational effects. Ricci is local depending on mass energy at that point and would vanish at other points. Weyl propogates the gravity effects (for example gravity at any point between Earth Moon is due to Weyl Tensor). I didn't quite get it...