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If you've got three, you'd be in a circus.Related:
Anything else he's got two of?
No it does not.I stand corrected. I read it in haste as non-pronounceable, not non-pronounciation. The former is a function of the abilities of a given reader.
if you go down the rabbit hole, and click on the first non-pronounciation hyperlink in every article that you come toThis implies that the word 'philosophy' isn't pronounceable.
Hi again Halc.Hyperbolic coordinates, not Rindler. The latter is for references with constant proper acceleration, which is not true of hyperbolic coordinates. The Milne universe is only one special case of the general hyperbolic coordinates. One can assign such coordinates to any event in spacetime, especially say one where grenade explodes in a vacuum.The transformation I did was not a Lorentz transformation, but rather one from an inertial frame to a hyperbolic frame......... (and stuff)....It's actually quite difficult to find a lot of good texts about the Milne model anymore but I think I've got an overview of the ideas. I'm mostly onboard with what was done in the transformation. The Milne universe seems to be using something like Rindler co-ordinates.
Agree to all, but the question still seems to stand:Quote from: HalcIs an expanding metric applied over Euclidean spacetime (a transformation done by Milne) make it no longer Euclidean?To which the main thing to note is that it wasn't an honest Euclidean space to start with. The underlying spacetime was Minkowski which isn't Euclidean and won't have Euclidean properties unless you are extremely careful to try and keep time and space separate.
Late addition: The (- + + +) convention is used in the texbook I have. Sean Carroll, An introduction to spacetime and Geometry, page 9.Yes, all the texts I have also show the interval to be the square and not just 's', but I don't usually see the -+++ part. So a 10 second duration has an interval of 100, or -100 if you're Carroll.
He defines (Δτ)2 = -(Δs)2, and states "the interval is defined to be (Δs)2 not the square root of this quantity". So he avoids imaginary numbers all the time anyway.
When they clearly didn't have?need one, coz they were not begotten/born but made.Science acknowledges a real Adam and Eve, defined respectively as the more recent male and female of a given species that is a common ancestor of all of the current living members of the species.
If science is correct then the real question is what came first the fish or the egg it is believed that all land creatures came from the sea?All from the sea, yes. From fish, not necessarily. Plenty of non-fish have crawled out of the sea.
To me MP does not mean a philosopher dabbling in physics but a physicist doing meta analysis,Actually I think Einstein expended quite some effort to keep his 1900's papers devoid of metaphysics as much as possible.
which is exactly what Einstein did in the early 1900s, and look where it got him.
Have U ever heard TGE/The Great Elon's argument why he thinks the universe is a simulation?Musk argues for a virtual reality, not a simulation, despite whatever word he might choose for it. A VR is an artificial set of sensory input to a real mind that is external to the VR. Different methods to falsify that, but quantum effects are less of a problem.'
Which experiment are you referring to?Any of the quantum eraser experiments, which, given an interpretation where say photons have position and state which 'in flight', demonstrate that effects now are a function not only of immediate prior local state, but distant state and events that don't take place until long into the future.
Simulations can usually also work backward.You're proposing that our universe is a simulation that is running blackwards?
Based on current states, previous states can be calculated, just like next states. That's the basis for Laplace's demon.Laplace would have loved defending his statement given modern physics. The statement assumes the universe is fundamentally classic, which has been shown to not be the case.
How can a/n SE object to a SW based universe?I donít know what SE is. It wasnít used or defined anywhere in the last 40 posts.
If I was going to implement a universe, I would do it in SW. Well, how else, could it be done?Software is wickedly inefficient. Iíve programmed analog computers and async digital ones. Thereís no software with them. Neither is there software in any biological information system. Evolution has found far superior methods to accomplish the work. But all of these are still classic information processors, despite relying on quantum effect to operate.
If I was going to simulate a classical universe, I think I would do it as just a 3D version of the game of LifeThen you get GoL physics, not our physics. Itís completely different. Yes, GoL (1D, 2D, 3D, whatever) has its own physics and is trivially implemented even if it consumes a lot of memory. Processor speed is irrelevant, as it is with all simulations, unless thereís money riding on it, which there has been in the circuit simulations Iíve worked on. Not much money mind you. Had they sunk more money into it, they might have got their product out in time to stay competitive.
Instead I would just keep track of all the objects, in tables, like an OS does.That only works with classic objects. Quantum physics doesnít have objects with states you can put in such tables. Thatís a big problem, which I described above.
What I'm really trying to say is that our cosmos is run by a?the Great Optimising Interpreter/GOI, which saysOK, so it does magic. Itís easy if you have a machine that does that. It canít do the quantum stuff until it knows that a certain collection of physics is a person with intent, and it cannot know that intent without first doing the quantum stuff from which the intent is computed. Thatís a circular dependency which causes a deadlock, which is why the GOI magic is necessary to provide the answers before theyíve been computed.
"OK. If U don't want to know which path the wavicle took
Email conveys a different message. Imagine the local lynch mob trying to get you to leave town by sending an email requesting it. No, they use the note and the brick through the window. Such messages convey so much more... Doing through a hole all the way through Earth would scare even the lynch mob types. They'd never mess with you after that.We could exchange mail by strapping letters to bricks and throwing them through the (frictionless) hole.That would work but Email is still faster.
but Dark Matter interacts with Normal Matter.Dark matter does not provide anything with extra mass any more than a planet adds mass to the star it orbits. But the mass of the dark matter affects spacetime the same as ordinary matter, so all matter, dark or not, is attracted gravitationally to each other.
Like by providing it extra mass?
Why can't a balloon cloud of Dark Matter engulf a small solar system.Dark matter doesn't clump into clouds with local density. To do that it would need to have to slow down as it fell into its own gravity well, and it can't slow down if it can't interact. So the speed of any particular bit of dark matter tends to be greater than the escape velocity of any local object it happens to find itself in the vicinity of. The deeper the gravity well, the more likely that dark matter will enter but then leave it. Regular matter tends to remain behind because it is slowed by friction.
Wish the was an alternate hypothesis which could negate Dark matter & energy n just explain the Universe in a simpler format.Be glad it's complicated. The simple universes don't have complicated things like us in them.
They say that if U drilled a hole all the way thru the centre of the Earth and dropped a weight/mass into it, then ignoring any friction, like air resistance or rubbing against the side/s, that it would fall right thru, in 42 minutesA hole drilled straight through from where I am would come up not in China but right in your kitchen. You and I are effectively inverted relative to each other. We could exchange mail by strapping letters to bricks and throwing them through the (frictionless) hole.
I know it wouldn't be China