Re: Einstein's 1939 paper challenging the existence of black holes

Igor Khavkine wrote on Wed, 06 May 2009 19:07:42 +0200:

On May 5, 5:16 am, Gerry Quinn <ger...@xxxxxxxxx> wrote:
In article <0c5246df-128c-4a33-acce-3f89bd43fe86
@c9g2000yqm.googlegroups.com>, igor...@xxxxxxxxx says...

(...)

For a sufficiently large black hole, all the gravitational effects
predicted by general relativity in a Schwarzschild space-time for
regions of small curvature (which include the exterior, the horizon,
and parts of the interior) can be reproduced to desired accuracy by
an effective spin-2 field theory formulated on a Minkowski background.
At the same time, large curvature regions of the Schwarzschild space-
time cannot be reproduced with a similar spin-2 field theory.

If you do a matematical reformulation of GR over flat spacetime, then
it is not suprising you obtain the same results than GR.

If you write down a theory of physical field over flat spacetime, then
you do not obtain neither horizon nor central singularity due to the
energy of the graviton field (energy which is not well defined in GR)

This is why Quinn (as others) wait observable desvitations from GR
predictions.

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