The h Bar

@0celouvsky Oh, they are, but the actual supersymmetry plays a rather minor role compared to the truckloads of algebraic and complex geometry that appear in the construction I'm looking at

Cows

12:29 AM

I asked a question. If anyone is interested please contribute an answer

0celouvsky

@ACuriousMind I'm reading the book on heat flow/Atiyah Singer by Gilkey. The guy's a madman. Complete proofs of Plancherel's theorem, Sobolev embedding, and Rellich embedding in the first eight pages...

I looked at this book two years ago and decided it was something I'd never read...

Slereah

hey

0celouvsky

@Slereah what's up

Slereah

just woke up

bit early again

0celouvsky

jesus

you're the anti @ACuriousMind

Slereah

12:36 AM

I tried taking a nap to get back on normal hours, but when it came time to wake up, I was like "Eh fuck it"

0celouvsky

REVERSED Kodak Black, 21 Savage, Lil Uzi Vert, Lil Yachty & Denzel Curry's 2016 XXL Freshmen Cypher

►

why does this exist

Physics Guy

Hello

Slereah

hello mister physics

I wonder if that thing with static spacetime applies generally

If a spacetime is translation symmetric, are there null homotopic spacelike loops

Wait, didn't we prove or at least motivate spacelike loops whenever $n \geq 3$

yeah I don't think the proof works, probably due to the multiple spatial dimensions

same reason ultrahyperbolic spacetimes always have ctcs

though I guess that's why it works in 2 dimensions

Since there's only one timelike dimension

Cows

1:08 AM

I don't know what you are saying. However, is it possible you could take a look at the question I asked on the site?

Slereah

lol

Cows

lol, seriously though physics.stackexchange.com/questions/324167/…

Slereah

Stop begging for answers

That works poorly

Cows

"begging"

I don't beg! Even when I was down I did not beg.

If someone could even tell me what theory had said properties, or definitions of what such things meant, I would derive the rest, just as I have been doing for the past 5 years

I just don't know the language they are using

lol

Anyways I asked a question on the site. I am not "begging" for answers. If you feel capable and willing to contribute an answer, the link is physics.stackexchange.com/questions/324167/… , otherwise save the primal tendencies for the real world.

Slereah

1:25 AM

Wait a moment

Is the fact that QFT path integrals are mostly done on vacuum states because of that Schroedinger wavefunctional formula $\int \mathscr D \phi e^{iS} \Psi_1^* \Psi_2$

And that $\Psi = 1$ for the vacuum

Cows

I am not sure what you are asking, but let me make a few general remarks concerning words you have mentioned. Then we can try to rephrase the question together.

Firstly as far as I know. Feynman path integrals according to how I have come to understand them, are generalizations ; or perhaps extensions of ideas of probability theory. They are infinite dimensional integrals as you know with an action S playing the central role. The dimension and whether or not the integral is easy to solve plays a big role.

The vacuum state is the sate of lowest energy or no particles

What you are asking me is if the path integrals are done on . . . . .?

ACuriousMind

@Slereah Yes

Cows

@ACuriousMind what was he asking?

ok I guess I am stupid

What do you mean psi = 1 for vacuum?

@Slereah was the question addressed to me?

Slereah

1:42 AM

It was not.

Cows

ok

LucasTizma

2:16 AM

I'm trying to define some simple 2D motion such that an object moves very quickly then suddenly exhibits a lot of friction and has a fairly long period of settling. I usually play around with a basic critically-damped spring equation, but it's not quite the motion I want.

Even playing with mass and stiffness (the spring system I work with has such parameters), I feel like there may be a different kind or characteristic of motion that I can look into to get the feel I want.

I don't know a ton about physics, so I may be asking for something that isn't really found in actual physics. :)

Slereah

2:52 AM

Reichenbach spends a long time talking about congruence

0celouvsky

3:49 AM

@Slereah here's a question

Is any set in a manifold that's contractible homeomorphic to a subset of Rn?

Slereah

I suspect it is

K. T.

Someone has to actually make a bar called the h bar

and theme it around theoretical physics

that would be awesome

Slereah

There is one, yes

I think it's at one of the big universities

K. T.

Oh I just searched, yeah at uwashington there is one

nice!

0celouvsky

@Slereah it's an interesting problem to think about

I don't know the answer

Slereah

4:02 AM

I looked for a related thing for my proof but it's hard to google

might have to ask MSE

K. T.

I don't know much about topology, but if it's contractible, then isn't it simply connected? And if it's simply connected, isn't the entire manifold homeomorphic to a n-sphere in Rn?

by the Poincare conjecture

0celouvsky

@Slereah ask me and I'll take a look when I get up

I'm off, bye

skill patrol

4:55 AM

Cya

Secret

5:26 AM

Next time I am going to ask questions one by one. I am NOT going to allow your subconscious anymore freedom of choice to answer randomly just one of them

-> Freewill is indeed an intriguing topic

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