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Feb
7
accepted Diffeomorphisms and boundary conditions
Feb
2
comment Diffeomorphisms and boundary conditions
I posted that on math.stackexchange because I hadn't find an answer here...
Feb
1
awarded  Promoter
Jan
28
accepted Dark energy before radiation or after?
Jan
28
comment Help with the understanding of boundary conditions on $AdS_3$
Related question, but I cannot seem to check if it's the correct way of solving this :\
Jan
28
answered Why not an Electric Theory of Everything?
Jan
28
asked Help with the understanding of boundary conditions on $AdS_3$
Jan
27
comment Dark energy before radiation or after?
Care to give some good links?
Jan
27
comment Dark energy before radiation or after?
So basically the inflation is due to dark energy? And therefore dark energy was there before the radiation era?
Jan
27
asked Dark energy before radiation or after?
Jan
23
comment Covariant derivative with upper index
Hmmm, thanks, that could help, I hope :D
Jan
23
comment Covariant derivative with upper index
Hmm, but what if I have $D_\mu h^{\sigma\nu}$, and I need to lower the indices of the $h^{\sigma\nu}$, does that mean, that I can put the g's that will lower the indices of h outside also?
Jan
22
comment Covariant derivative with upper index
Thanks for the clarification, I'll try to make sth out of this expression :D
Jan
22
accepted Covariant derivative with upper index
Jan
22
comment Covariant derivative with upper index
"Typically, it also implies that any derivatives appearing are with respect to covariant components instead of contravariant." What if I have mixed terms inside? I mean, in the expression I also have scalars, covariant vectors, contravariant vectors, covariant and contravariant tensors...
Jan
22
asked Covariant derivative with upper index
Jan
18
asked Diffeomorphisms and boundary conditions
Jan
17
awarded  Organizer
Jan
17
revised Please recommend a physics problems book similar to Demidovich
Added extra tags
Jan
17
suggested suggested edit on Please recommend a physics problems book similar to Demidovich