Jaime Rudas's latest activity

Yes, yes. I understand.

Understood. Hawking's viewpoints on the nature of space and time are not considered actual scientific literature. I add this point to...

I disagree. This text is certainly not a textbook or a peer-reviewed paper, but it can't be considered a pop science book or anything...

Isn't what Hawking wrote considered actual scientific literature?

Yes - it's a time-dependant rescaling of cosmological time. Co-moving clocks tick cosmological time, and only tick conformal time at the...

Would conformal time, as defined by Davis & Lineweaver in equation (29), be an example of this?

This is also what I would say is the key difference. They have different domains. It can be that on the worldline of a given clock they...

No. Proper time does not have a notion of simultaneity like coordinate time does.

I'd say that the proper time of a clock is only defined along its wordline, whereas coordinate and cosmological times are defined over a...

In general, no. We can choose any coordinate system we please according to whatever amuses us, and there's no reason that the...

Understood, but let me rephrase the question slightly: Is coordinate time equivalent to the proper time of a given clock?

Are coordinate time and cosmological time the proper time of a given clock?

For example, the Newtonian gravitational force is given by ##F = \frac{Gm_1m_2}{r^2}##. In theory, two point particles can be...

One time at a department meeting the chair declared that some educational data we'd collected was "bad" because it didn't show the...

It is correct even for an infinite initial size.