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Topic: GR "Spaghetification"
Replies: 73   Last Post: Jul 25, 2009 4:41 AM

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 galathaea Posts: 1,646 Registered: 7/2/05
Re: GR "Spaghetification"
Posted: Jun 24, 2009 10:01 PM

On Jun 24, 2:54 pm, stevendaryl3...@yahoo.com (Daryl McCullough)
wrote:
> Steve Bell says...

> >By the "curvature of space" I mean the determinant of the
> >3x3 space part of the Riemann-Christoffel curvature tensor evaluated at that
> >point.

>
> The separation of spacetime into a spatial part plus a time
> part is coordinate-dependent. Different coordinates will make
> that separation differently.
>
> Yes, if you fix a particular coordinate system, then
> you can talk about the spatial curvature tensor, but
> you must first decide on a coordinate system (or at
> least, you have to decide on your time axis).

there are essential properties that can be extracted
common to all such theories
and it is possible to in essence "quotient them out"

to provide a foliation of spacetime
giving 3+1 field equations that are useful
to exploring quantisation schemas
that don't suffer certain classes of contradictions

it's this kind of decomposition
on which is built the wheeler-dewitt equation
and theories like bohmian gravity
or the acoustic gravity theory of unruh

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
galathaea: prankster, fablist, magician, liar

Date Subject Author
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6/21/09 Steve Bell
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