PeterDonis's latest activity

What text? Please give a specific reference.

Yes, that's correct for those coordinates. A more general statement would be that the factor of 2 in the global deflection is due to...

To be more precise: the global bending of light when passing close by a massive object, i.e., the angle between its incoming path at...

If you know the curve C, yes. But if all you know is the vector V at point P, the "exponentiation" operation you referred to earlier in...

Not just not very clear, but apparently confused about what you are trying to talk about. See below. Yes. Which means that the key...

But the unique determination of a curve from a tangent vector at P is only true for geodesics. So the logic you described in post #22...

This is true for the total global deflection over a large region around a mass, where the effects of spatial curvature become...

As @A.T. pointed out, this is not correct. The factor of 2 you describe here is global, not local; the local light bending in...

Yes, but these things aren't known just from knowing the tangent vector at P. But for parallel transport, you don't need to know the...

Yes, I agree, this operation is rigorous, but the actual rigorous operation, if you look at it, doesn't map a vector in the tangent...

Yes. No, because FW transport involves the proper acceleration, and knowing the tangent vector at only one point doesn't tell you the...

No, you have to know them all along the curve, not just at one point on the curve. But even that assumes that you're only concerned...

Moderator's note: A subthread on frame fields has been spun off into a separate thread...

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It does no such thing. GR says nothing whatever either way about black hole entropy and temperature. Temperature and entropy don't even...