Recent content by gnnmartin

But find my problem melting away, thanks to this threads promptings. If you can project the 3 space onto a flat 3 space, then you can map it with a single chart. If you have an algorithm that excises volumes to resolve ambiguity, then you can map the remaining space in a single chart. The...

You don't need a third dimension, but it can enable you to define a large chart. Forget about the earth, and just consider a part of the earth, or indeed any large non-flat surface with mountains, valleys and caves. The imaginary 3rd dimension enable us to define the parts of the surface (the...

Thanks. Not quite what I hoped, but perhaps what I hoped is not possible. To take an example, we address the surface of the earth using spherical coordinates. The real surface has hills and valleys and overhangs and caves, and we can address the complete surface with some exceptions. By...

Both sides of an Einstein Rosen bridge can be covered by a single chart (using isotropic coordinates). If empty space contains two bridges, then I assume (but can't prove) that the space up to the neck of the bridges can be described in a single chart. I'm interested in how much of infinite...

Thanks. And sorry for the Vixra reference. I was being pressed to explain what i meant, and I had explained it there.

From Misner Thorne & Wheeler 'Gravitation', quoting Newton: https://en.wikipedia.org/wiki/Action_at_a_distance#Einstein gives a good summary of the notion of action at a distance. Einstein's theory led people initially to assume that all action was local. Bell's paper was perhaps the turning...

Perhaps more accurately, I assumed a quantum event was a reasonable way of referring to a discontinuity in the 'action at a distance' upon a point. I could have perhaps talked about the collapse of the wave function, but I thought that would be more presumptuous.

Yours (PeterDonis's) is an interesting reply, which does indeed go to the heart of my problem. I had assumed that QM experts would be happy with the term 'quantum event', and so look to you (in this case) to tell me what it means if you think I am using it incorrectly. The closest I can get to...

I ought perhaps to retire from this thread, so forgive me continuing. If an electron in a cathode ray tube hits the screen, and causes a flash which is seen by the operator, is that a quantum event? If yes, then if the operator was not watching, did a quantum event occur none the less? If...

OK, thanks. I'll just have to hope I am not missing the point when I write my paper.

Thanks. Yes, you cannot say some specific outcome has occurred, but I wish to be able to assert (roughly speaking) the probable order of the number of quantum events that will occur in a coordinate unit of space/time in the material of a star shortly before an event horizon forms. If you...

Indeed, that is (I think) what I was trying to say, except I was trying to be a bit more precise about the verb 'detecting', because of course quantum events occur whether or not they are detected, just as Schrödinger's cat is definitely dead (or has definitely survived) whether or not anybody...

Thanks, that it is as I thought, but I feared I was wrong. My question was not prompted by a particular paper, more by an uneasy feeling from papers I have glanced at. I want to be able use my assumption in a paper that I hope to write, so wanted to be sure it was not obviously incorrect.

I apologise for my very limited understanding of quantum physics: my background is in General Relativity. A wave function is said to represent the probability of a particle being at some point in space/time, and I take that to mean that the probability of a quantum event is a density on...

Thanks, yes, it was not immediately obvious to me, but given the prompt I can see it.