On 4/25/13 4/25/13 12:26 PM, Koobee Wublee wrote: > There is still no mathematical proof showing that null Ricci tensor > with non-vanishing Riemann tensor.
[I just happened to see this.]
This is just plain wrong. The Schwarzschild manifold has Ricci=0 everywhere, and Riemann!=0 everywhere. Indeed EVERY vacuum region of EVERY manifold of GR has Ricci=0, and most of them have Riemann!=0 (only a handful are flat).
It's remarkable how much effort Koobee Wublee expends while trying to pose as knowledgeable; he actually knows almost nothing about GR and its mathematics. Essentially everything he says is wrong, with the exceptions being indistinguishable from occasional lucky guesses.
That's why I rarely respond to his nonsense. He has repeatedly proven he is incapable of learning....