Skip to main content
7 events
when toggle format what by license comment
Apr 9 at 16:58 history undeleted G. Blaickner
Apr 9 at 16:58 history deleted G. Blaickner via Vote
Feb 28 at 15:58 comment added Igor Khavkine ... special choices of linearized lapse/shift in the ADM formalism. So if you are interested in special backgrounds, it is the corresponding "gauge fixing" that you'd need to look into.
Feb 28 at 15:57 comment added Igor Khavkine The nonlinear equations have fewer evolution equations than unknowns, and so will the linearized system have fewer evolution equations than unknowns (which is a way to rephrase what Willie said). BTW, there is a huge literature on linearized Einstein equations, though not so much of it uses the ADM form. Much of the literature focuses on specific backgrounds (cosmological, black hole, etc.), since not much can be said about general backgrounds besides local existence (or global existence with very loose bounds). Special backgrounds invite special choices of gauge, which translate to ...
Feb 28 at 14:31 comment added Willie Wong Can you not just take $\bar{N}, \bar{X}$ to be free parameters, the same way that $N, X$ are parameters in the ADM formalism?
Feb 28 at 11:21 history edited G. Blaickner CC BY-SA 4.0
deleted 10 characters in body
Feb 28 at 11:14 history asked G. Blaickner CC BY-SA 4.0