PeterDonis's latest activity

It looks like these got published in 2012. On a quick skim, I don't see any reference anywhere to the BGV theorem, and the paper where...

Well, if you'd posted some links, you might have gotten some feedback by now. As it is, you have none. What does that tell you?

Neither can we, if you don't provide any reference to it. What about if someone on here were to give you an opinion on one or more of...

Where have you looked?

Yes. It's important to recognize also that the curve in question is a geodesic of the curved 2-sphere, but it is not a geodesic of the...

When discussing isometric embeddings, there is a little more to it. The metric of the submanifold is taken to be induced from the...

More precisely, by the Riemann curvature tensor that's derived from a metric via its Levi-Civita connection. There's no problem with...

If the paper is "hovering" statically, i.e., no radial or tangential motion, frame dragging has no effect.

The paper cited in the OP makes heavy use of the DESI 2025 release. Statistical analysis is in section 4.

Basically, yes. Not from cosmology, no. If I understand the paper correctly, revising our model of the universe in the way the paper...

Yes, one possible result if this new analysis holds up is that cosmologists would revise their estimate of the value of the cosmological...

Ok, so your "therefore" should not have been there.

It is, provided that our universe's cosmological constant actually is positive.

Yes. I'm not sure where your "therefore" here comes from; this statement is completely unrelated to the previous one. There's no...

Yes, there are theoretical models that do that. If there is no dark energy (zero cosmological constant), then the only significant...