javisot's latest activity
-
Jjavisot replied to the thread Why Are You Still Here? A Curious Question."Why are you still here?" I don't know exactly. But I'm noticing that PF and the forums in general might soon have problems with the...
-
JGood afternoon, This is not Paul, but rather his son Robert. I am very sad to write here that my dad passed away on Saturday...
-
Jjavisot reacted to Ibix's post in the thread Do you want to expand your mind faster than cosmic inflation? with
Like.
Welcome to PF. Please do take the time to read the rules, particularly the parts about speculative and non-mainstream theories. We can... -
Jjavisot reacted to PAllen's post in the thread High School Estimates — True Size of the Universe? with Like.
You can, but many people have a hard time picturing how this is possible. My suggestion provides a way to picture this that was helpful...
-
Jjavisot replied to the thread High School Estimates — True Size of the Universe?.(When I said it was a property of all spacetime, I didn't say it was a property of all spacetimes. We're talking specifically about an...
-
Jjavisot reacted to PAllen's post in the thread High School Estimates — True Size of the Universe? with Like.
Actually, it is only a possible property of very special spacetimes. It is a feature of geometry that is hard to visualize in a 3x1...
-
Jjavisot replied to the thread High School Estimates — True Size of the Universe?.As Ibix says, the bread example isn't very good, but PAllen's example is brilliant. There's no contradiction between having an infinite...
-
Jjavisot reacted to Ibix's post in the thread High School Estimates — True Size of the Universe? with Like.
The problem with this one is the finite size. People conflate the increase in volume of the finite lump of dough with the expansion...
-
Jjavisot reacted to PAllen's post in the thread High School Estimates — True Size of the Universe? with Like.
I’ve used the following analogy to picture an infinite expanding universe. Consider the universe as an (countably) infinite collection...
-
Jjavisot reacted to Jaime Rudas's post in the thread High School Estimates — True Size of the Universe? with Like.
Yes, because expansion, in this context, doesn't mean its size increases, but rather that the distance between objects gets ever...
-
Jjavisot reacted to Ibix's post in the thread High School Estimates — True Size of the Universe? with Like.
Imagine a line of stakes 1m apart. The line is so long you can't see the end - and maybe there is no end. Go away and come back, and...
-
Jjavisot reacted to BillTre's post in the thread What causes the asymmetry in a symmetrically developing organism? with Like.
There are different kinds of asymmetry found in animals. The kind you are talking about are kind of subtle deviations from perfect...
-
JThat's correct. What you are calling "ordinary" QM is a non-relativistic approximation. For relativistically correct QM, you need...
-
Jjavisot replied to the thread Undergrad Questioning the timescape model.You're right, I didn't share the papers with the intention of correcting anything. If you look at all four papers, they all state...
-
Jjavisot reacted to PeterDonis's post in the thread Undergrad Questioning the timescape model with Like.
The fact that these papers claim to be testing "the equivalence principle on cosmological scales" doesn't mean the concept actually...