Re: Are There Unresolver Foundational Issues With GR

On Apr 28, 9:19 pm, Eric Gisse <jowr...@xxxxxxxxx> wrote:
On Apr 28, 7:51 pm, Koobee Wublee <koobee.wub...@xxxxxxxxx> wrote:



On Apr 28, 12:14 am, JanPB <film...@xxxxxxxxx> wrote:

On Apr 27, 11:19 pm, Koobee Wublee <koobee.wub...@xxxxxxxxx> wrote:
OK. But you didn't answer the question that's really basic here:
how two functions assigning the same lengths and the same angles to
the same vectors can STILL be considered physically different. What
distinguishes them, physically?

This is a stupid question.

No, this is the root of your confusion. You claim that two different
expressions of the same geometry (what you call "two different
metrics") are to be treated as physically different.

This question remains the most stupid as I have seriously
encountered. It is not that I refuse to answer that question. I am
still appalled by your lack of understanding in the very fundamental
algebra. Sometimes, I am even debating with myself if I should
continue with this pointless discussion with you on the most basic of
the mathematics involved.

So I'm asking a simple question: HOW can a person - some observer in
space or whatever - tell the difference?

Your question has no relevance to our discussion. I am not claiming
two different expressions for the same geometry. I am claiming two
different metrics using the same coordinate system must each
represents a different geometry. <shrug>

Then show us two different metrics using the same coordinate system
that represent different geometries while being solutions to the
Einstein field equations in vacuum with spherical symmetry.

[...]

That's a good question too. Please do that, Koobee:

(i) a fixed coordinate system,
(ii) two different sets of g_ij's written with respect to that fixed
coordinate system, both sets spherically symmetric and satisfying the
vaccum EFE.

--
Jan Bielawski

.

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