Re: GR support for a preferred frame 2
- From: Ben Rudiak-Gould <br276deleteme@xxxxxxxxx>
- Date: Wed, 25 Jul 2007 00:35:56 +0100
Tom Roberts wrote:
Yes, GR does indeed have many manifolds in which there is a "preferred frame" that is "preferred" due to some symmetry of the manifold. You merely give one example.
Another example (as you know but the OP might not) is all versions of the FLRW geometry that's used to model our universe, even when space is flat or hyperbolic rather than (hyper)spherical. The "preferred frame" is observable as the state of motion with respect to which the CMBR is isotropic. Historically it was known as rest with respect to the fixed stars. It's also called the Hubble flow.
-- Ben
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