The h Bar

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PM 2Ring

08:30

Finite fields are pretty important in crypto. Eg, AES uses the Galois Field of 2^8.

Slereah

08:59

I don't think those people have to use fiber bundles

ACuriousMind

true in the strict sense, but they have to deal with all sorts of algebro-geometric constructions :P

Slereah

From what I can tell they mostly deal with biology

All those apes

Slereah

09:23

That causal structure paper talks about the fibration $$\pi : J^2(\mathbb{R}, \mathbb{R}) \to M$$

How does that even make sense

I don't even think the dimensions make sense if $M$ is big enough

"The map $\pi$ is the quotient map of $J^2(\mathbb{R}, \mathbb{R})$ by the foliation defined by the $2$-jets of the solutions of the ODE."

8 hours later…

B. Brekke

17:09

There seems to be disproportionally many working on high-energy physics on this site, compared to condensed matter physics. Why is that?

Slereah

17:51

there is another site for CMP I think?

ACuriousMind

that one's rather new

I think it's mostly a founding effect - for some reason the site started out with disproportionally many hep-th people and therefore kept attracting more of them

Slereah

Also I guess HEP and GR are just cooler

Slereah

18:08

much cooler than say...

physics.stackexchange.com/questions/tagged/rheology

1 hour later…

imbAF

19:13

@ACuriousMind could your recommend me a book/pdf about probability, one that is necessary to know, when one studies quantum mechanics ?

2 hours later…

fqq

20:59

IMO you don't need that much probability theory for introductory QM. If you know about discrete and continuous random variables and can compute expected values/moments you are essentially fine

imbAF

I see

Yeah I know those things, those concepts

But I think, or I believe that statistics/probability theory is important in quantum statistical mechanics. Hence why I wanted to dive in more into the subject

fqq

yes, it's more important in statistical mechanics (even classical) but that's not introductory QM

it's more important to get a good grasp of basic quantum mechanics first

imbAF

I am currently doing that

fqq

there's probably a good "basic probability theory" appendix in some stat mech books but I can't think of anything in particular right now

imbAF

21:17

that would help me

fqq

just having a quick look at my books, Jacobs' "Stochastic processes for physicists" chapter 1 seems like the sort of thing you are looking for (but I don't think I've ever read it)

Also the first chapter of Schwabl - stat mech. Peliti's statmech in a nutshell has a shorter appendix

imbAF

21:31

Ok thaaank you\

2 hours later…