pdonis

4 ms·

31.
by pdonis 1mo ago
> The Dirac equation and Quantum Electro Dynamics (QED) unify quantum mechanics and special relativity And more generally the Standard Model, which includes the weak and strong interactions. The SM is a quantum field theory, which, as
32.
by pdonis 1mo ago
The city is not a State. The Fourteenth Amendment says that States shall not abridge the privileges and immunities of citizens. As the court's opinion points out (and as others have pointed out in this thread), there are plenty of ot
33.
by pdonis 1mo ago
The city is not a State, so that clause would not apply to it. Unless you want to argue that the State of Mississippi was violating the Fourteenth Amendment by not requiring its cities to provide clean water (the article mentions that a f
34.
by pdonis 1mo ago
Incorporation of the Bill of Rights doesn't extend any powers granted by the Constitution to the Federal government, to state, county, city, etc. governments. It just says those governments (well, the State governments, since the Ame
35.
by pdonis 1mo ago
> The Fourteenth Amendment explicitly constrains states It says states can't make laws that abridge the privileges or immunities of citizens. It does not say states have to provide whatever services citizens would like to have.
36.
by pdonis 1mo ago
> The Preamble explicitly states that the Constitution is for these six things. The Constitution establishes the Federal government. Not state, county, city, municipal governments. It says what the Federal government is for. Not wh
37.
by pdonis 1mo ago
I assume you're not including Pluto-Charon here (presumably since Pluto is now demoted to "dwarf planet")? Their mass ratio is only about 8:1, which is far smaller than Earth-Moon, 81:1.
38.
by pdonis 1mo ago
Perhaps a server run by a large corporation could do this. Perhaps. But an ordinary person? I don't see it. If it's tough for an ordinary person to handle safely opening a port in their firewall for forwarding, it's tough squ
39.
by pdonis 1mo ago
> NAT and a firewall are 2 different things Exactly. Which is the issue with saying, as the article does, that NAT is the reason most people don't have an Internet visible server, when the real reason is that their computers need
40.
by pdonis 1mo ago
The Sun's gravitational pull on the Moon is always stronger than the Earth's. (Do the math and see--on average the Sun's pull is more than twice as strong as the Earth's.) So the net acceleration of the Moon is always to
41.
by pdonis 1mo ago
As I understand it, one suggested "double planet" definition was that the barycenter would have to be outside both objects. Earth-Moon doesn't (quite) satisfy that condition, but for example, Pluto-Charon does.
42.
by pdonis 1mo ago
> most of the time they are unwanted users trying to break in. Exactly. Of all the reasons why the average person doesn't have an Internet-visible server, NAT, I would say, is pretty far down on the list.
43.
by pdonis 1mo ago
Since the Moon's orbit is always concave towards the Sun, one could even argue that the Moon is a planet, not a satellite, it just happens to have an orbit that is closely coupled to that of another planet, Earth. As I understand it,
44.
by pdonis 1mo ago
I sympathize to an extent with Leavis's anger, but also with Snow's reaction. As you note, Leavis represents bad aspects of the humanities as much as Snow, in Leavis's view, represents bad aspects of science (or perhaps &quot
45.
by pdonis 1mo ago
We have a Ring doorbell that hooks into the actual chime that the old doorbell used, so it still preserves the old doorbell's functionality[1]. I can understand not wanting to buy into the Ring ecosystem (we started using them before t
46.
by pdonis 1mo ago
The lawful way for law enforcement to enter a home is to get a search warrant (or whatever the EU equivalent is) and show it to the owner, who then lets them in because that's what the law requires. No need for law enforcement to eve
47.
by pdonis 1mo ago
> I don’t want to stop the bots from updating their knowledge based on all the content. Why not? At this point, any attempt to try to meet the bots halfway is doomed.
48.
by pdonis 1mo ago
Is there a version of this that doesn't force me to click through slides with very little content on each one, as if I were in kindergarten? To whoever wrote this: I can read.
49.
by pdonis 1mo ago
> you are still arguing against things I never said You said the singularity is a point in space. That's what I'm arguing against. The rest was an attempt to try to help you understand the correct physics. Evidently it was wa
50.
by pdonis 1mo ago
The GP is not saying the small entity pays the bond. The GP is saying the big entity that wants the content taken down (in this case Microsoft and TracerAI) pays the bond, and forfeits it if a counter notice is issued.
51.
by pdonis 1mo ago
If there is any non-empty subset that has no smallest element, then the ordering in question is not a well-ordering. You can of course define some subsets of the reals that do have a smallest element in the standard ordering, for exampl
52.
by pdonis 1mo ago
> The reals can be ordered, just use x < y. That ordering is not a well-ordering , which is what the GP specified. A well ordering requires that every non-empty subset has a smallest element. That's not true for the reals orde
53.
by pdonis 1mo ago
> Have you actually dedicated significant time to trying to learn how to visualize? I haven't had to. I don't have aphantasia. Visualizing doesn't feel like a learned skill to me. It feels like something I've always
54.
by pdonis 1mo ago
Learning to juggle involves easily observed objective activities that other people can check, and which can be learned that way--you can watch someone else juggling, read book that describes the tossing of the balls, etc. How do you do any
55.
by pdonis 1mo ago
Sorry, you're just repeating the same wrong statement. I know you said "space", and I already explained that a spacelike line in spacetime cannot be a point in space. It can only be a moment of time. You are quite correct t
56.
by pdonis 1mo ago
No, everything you wrote is not true, in Eddington Finkelstein or any other coordinates. You wrote that the singularity is a point in space. It's not, no matter what coordinates you choose. It's a line in spacetime, but it's
57.
by pdonis 1mo ago
Kerr spacetime contains closed timelike curves inside the inner horizon. You can reach them from the outside universe, but you can't escape back out. Also, the region inside the inner horizon of Kerr spacetime is widely considered to b
58.
by pdonis 2mo ago
> it is just a mathematical artefact of weirdly chosen coordinates. No, that's not correct. The fact that the singularity is always in your future inside the horizon is an invariant, independent of any choice of coordinates. >
59.
by pdonis 2mo ago
> It also is in Schwarzschild coords True--indeed, the statement that it's a spacelike line is an invariant, independent of any choice of coordinates. But it's a lot harder to see that in Schwarzschild coordinates. > Krus
60.
by pdonis 2mo ago
> Susskind's book does also mention that the event-horizon shenanigans are due to coordinates and not a physical thing. That's good. However: > Interchange of Space and Time Dimensions at the Horizon This still seems mis

More ›