PeterDonis's latest activity

Not quite. It's true that "deterministic, but with epistemic uncertainty" forces you to accept something like the Bohmian...

But there are QM interpretations where the results are epistemic and the assumptions you refer to are violated. For example, the Bohmian...

You still haven't shown the math of how you pick these out from other stresses. And, as I pointed out in a post some time ago, and...

No, this is not correct. If you apply external forces to each part of the object sufficient to account for the proper acceleration of...

I think their claim is more limited than that. De Sitter spacetime has a timelike KVF, and a Killing motion using that KVF can certainly...

Ah, ok. I don't think that's what @Ibix was describing: he was describing setting up a static network of rockets in Schwarzschild...

Which congruence are you referring to? The one that describes moving the structure from flat spacetime to curved spacetime?

Ah, got it, thanks! The key point is that the form given by Moller (1952) explicitly shows that the orthogonal spatial slices are flat...

Wouldn't this violate the H-N theorem if it were true?

If the proper acceleration of each worldline is not constant, the congruence is not stationary.

Hm. This congruence would be irrotational, but I don't think its orthogonal hypersurfaces would be flat. So it would not meet the...

Ok, that is fine. However, what is true includes that, in an invariant sense, you can't place the rockets in the new locations at the...

I think the intent was to have the same physical threads in the second case--that you would take the structure built in flat spacetime...

Perhaps a slightly different experiment might help. Consider a flock of small rockets. Initially they are at rest far from a black hole...

But what does that relaxed proper length depend on? You seem to be saying that, if I build two beams of the exact same material, one in...