PeterDonis's latest activity

How would you express this claim in terms of a covariant mathematical formula? Note that the separation between "magnetic force" and...

I once asked the same question, how do we know if the distant galaxies are accelerating now since the light we observe here and now is...

Vague? What sources are you reading? Because from the quoted passage I suspect you are reading non-technical sources and complaining...

What's the point of even talking about them if they don't correspond to any actual measurements we make? The point of the argument was...

A trajectory has to be continuous. A definite configuration at all times does not guarantee that the position of a given particle at all...

Ah, got it. Thanks for the reminder of basic vector space theory. :oops:

Zero times some other vector isn't the zero vector, is it? It's zero, the number. That's the weird thing about a zero eigenvalue...

I'm not sure this actually works with zero eigenvalues. For example, if the state is |n_L, i_R>, applying ML to it is straightforward...

As a addition to my post #92, Coleman's argument is not equivalent to what Mott presents in his seminal 1929 work. Mott demonstrates...

That's all very well (assuming it's correct--I'll have to cogitate some more about the states and operators you give), but it doesn't...

Please show this explicitly, or give a reference that does so. It does not seem at all obvious to me, but I'm not very familiar with the...

Well, the associated eigenspace of L with eigenvalue +1 is the entire space of possible linear superpositions of straight-line tracks...

If I need to spell it out, sure. It's simple: If a quantum system is in an eigenstate of an observable, then observing it does not...

Your post #80 sure looked to me like you were using the consistent histories interpretation to analyze it.

In other words, you're using a different interpretation from Coleman. That means we should be discussing your viewpoint in a separate...