The h Bar

the notebooks should be the python api which is much nicer than me trying to figure out how the hell to use a python package purely on command line -.-

enumaris

12:58 AM

slowly figuring it out...thanks for the link!

time to go home tho

More Anonymous

1:17 AM

hey! what is the procedure to ask if ur question is worth migrating to stackoverflow?

(anyone?)

danielunderwood

From PSE to SO?

More Anonymous

yea ...

(though I never feel quite pro enough to post there) :P

I meant physicsoverflow

danielunderwood

1:33 AM

Ahh I have no idea then. They aren't a network site, so there may not really be a way to do a migration other than just posting the question there

Sir Cumference

Sometimes I feel like the only one who feels physics can benefit from some more rigor

Sir Cumference

1:59 AM

Well, specifically undergraduate physics

Blazar

2:22 AM

hi

Swapnil Das

2:57 AM

hi

Blazar

3:10 AM

@SwapnilDas I think i might know you from brilliant

Swapnil Das

3:26 AM

@Blazar Oh, yeah, I'm from there. Nice to meet you :)

Blazar

4:15 AM

@SwapnilDas same here

David Z

5:19 AM

@MoreAnonymous We don't and can't do migrations to sites outside of the SE network (like Physics Overflow). You can decide to post your question there or not; also, you can decide to keep your question here or not (if you see the link allowing you to delete it). But those two decisions are entirely independent of each other.

If you were asking about migrating it to another site in the network, like Stack Overflow... first establish that it's off topic here on PSE, then we can talk about migration.

Slereah

8:19 AM

mornin

Emilio Pisanty

10:57 AM

@DavidZ @MoreAnonymous That isn't exactly accurate. We don't have any ability to migrate questions to Physics Overflow. However, PO does have the ability to import PSE content. See here for their relevant help thread.

if you're the owner of the question, though, it is easier for you to simply post a new question there (and, as correct academic practice, I would strongly recommend linking to the original here).

David Z

@EmilioPisanty That's true, but I don't see how that makes what I wrote inaccurate.

Emilio Pisanty

@DavidZ maybe not inaccurate, but missing some important information relevant to the question.

No aggressiveness intended =).

@MoreAnonymous as to why you would want to, though... are you really sure that the community there is actually better poised to answer your questions? Just because someone says that they are "better" in some metric doesn't make it so. And just because PO has artificially restricted their scope to look more "high level" doesn't mean that questions actually get answered there.

ooooohhh, here's a good test point. Let's see how long this post stays up.

Anonymous

11:42 AM

@SirCumference You're not alone

Sha Vuklia

hey guys, I was just wondering. say your account gets suspended, does that mean you're also not allowed to make a new account?

Anonymous

Right

Anonymous

@ShaVuklia You're not supposed do anything that circumvents the restrictions imposed by the suspension

Anonymous

Obviously you can make a new account but there 's a high chance that you'll get caught :P And for repeat offenders the ban is IP level

David Z

@ShaVuklia TL;DR correct. You're not allowed to make a new account while suspended.

(Or technically... what is not allowed is using the new account)

Anonymous

11:52 AM

However, keep in mind that questions bans are a different. In case you get question banned you can delete your account and recreate it

Anonymous

Even then you'll be restricted to 1 question per week

David Z

@Blue Eh, well that's not really allowed either

Anonymous

Question bans are also IP level

Anonymous

@DavidZ Are you sure? I thought it's allowed on SO

Anonymous

Gotta check meta

David Z

11:55 AM

Well, it may be de facto "allowed" in the sense that it can be difficult to catch, but the general rule is that you can't (shouldn't) use an alternate account to do anything that your original account is restricted from doing. By that logic, if your original account is limited to a certain rate of posting questions, then using another account to post more frequently than that would be breaking the rule.

But let me know if you find anything (reasonably well received) on Meta Stack Exchange that says otherwise.

Anonymous

> If you opt to delete your account and then later return to the site, your ability to ask questions may be limited to one question per week until you have demonstrated an ability to ask useful questions.

Anonymous

40

A: What can I do when getting “We are no longer accepting questions/answers from this account”?

Why am I getting this message? As stated in the about links on every page, Stack Exchange is a network of question and answer sites, not help forums. This implies that all posts are expected to have value for later visitors, in addition to helping the asker. To enforce that, and to prevent help ...

Anonymous

Yeah, so that doesn't seem to be against the rules (at least not explicitly). Technically it's not an alternate account in this context because the original account doesn't exist anymore. @DavidZ

David Z

Well... (1) that's on MSO, not MSE; (2) just because that particular piece you quoted doesn't say it's against the rules doesn't mean it's not against the rules; (3) in any case "You could create a new account, but doing so violates the rules for operating multiple accounts - namely, it allows you to do something you would otherwise be restricted from doing" seems fairly explicit about it.

And if you don't think that the new account qualifies as an "alternate account" because the original doesn't exist anymore, please substitute your preferred wording which does cover any account other than the original one used by the same person.

Anonymous

The point is that it's not exactly a "new account"....you're using the same account - same email id, same user id, same password as before. And more or less MSO rules and MSE rules tend to be similar...so.

David Z

12:07 PM

It's a new account.

Different accounts can share the same email and other stuff.

Anonymous

Okaies...we differ here :P. This might be worth a new question on MSE btw

Anonymous

"Is deleting and re-creating my account when I'm question-banned, against SE rules?"

David Z

Sure, but note that we're talking about not just deleting and recreating the account, but using it to post more frequently than you would otherwise have been able to.

Anonymous

Right, I'll add that in

Anonymous

Lemme ask on the tavern

David Z

12:16 PM

Basically, the position of the moderators here (and, I think, elsewhere on the network) is that any time an account earns a restriction (e.g. suspension, quality ban, review ban), the person whose account it is has to abide by that restriction. Doing otherwise is considered a violation of the site rules, whether are not there are effective technical measures in place to prevent it.

Anonymous

12:29 PM

I have no personal problems with that. My issue is somewhat different. (1) Question bans are IP level afaik. (2) Recreated question banned accounts (not sockpuppets) are restricted to 1 question per 1 week. Now, I don't understand that if they really wanted to impose the same restrictions on the recreated account as on the original account they would have done so i.e. impose an indefinite question ban as soon as the new account is created after deleting the original account.

Anonymous

But there's surely some reason why they didn't do that. One primary reason is that if a person deletes and recreates his account, then he'd have absolutely no way to fix it in future .... because it has no posts to fix!

David Z

Yeah, there must be a reason. I've speculated that it might have something to do with the risk of affecting accounts created from the same IP address but legitimately belonging to different people, but I really don't know (at least not offhand).

Emilio Pisanty

1:10 PM

@Blue there's all sorts of information we can't see informing those decisions

Anonymous

@EmilioPisanty Ummm, what do you mean?

Emilio Pisanty

@Blue that SE interfaces with a huge population of users and non-users in ways that we can't see.

Anonymous

Like there's lot of things which have no explicit explanations given by SE?

Anonymous

@EmilioPisanty Yeah, that's for sure

Slereah

So is there a Thing for today's event

Or should we make up an activity

We could sing

Anonymous

1:19 PM

Let's sing

Anonymous

Not many people can tolerate my singing....so beware

Captain Bohemian

I don't really know what afaik means though I have seen @Blue uses it multiple times.

Anonymous

@CaptainBohemian Afaik it means "as far as I know".

Slereah

We could sing the musical stylings of Tom Lehrer

ww3.haverford.edu/physics-astro/songs/lehrer/questions.htm

Emilio Pisanty

@rob This isn't an isolated case - previous questions by OP with the same lack of care for defining jargon, despite explicit prompting, are here, here, here and here (at least). This has gone beyond the point where this can be considered a forgivable I-didn't-know $-$ I'm voting to close this question until tgmjack fixes this question to match the site requirements on question clarity and definition of jargon. — Emilio Pisanty 39 secs ago

$\Huge 😒$

Slereah

1:29 PM

ww3.haverford.edu/physics-astro/songs/roberts/Cyclo.mp3

also a good choice of song

The cyclotronist's nightmare

Anonymous

@Slereah Nice baritone :)

Slereah

the dulcet tones of Arthur Roberts

Arthur Roberts (physicist)

Arthur Roberts (July 6, 1912 – April 22, 2004) was an American physicist and composer.He is remembered for several humoristic and satirical songs on scientific subjects, which he sang to piano accompaniment. == Songs == His best-known songs are preserved in a 78rpm vinyl record made in 1947. The songs are performed by faculty and students of the "State University of Iowa" (now the University of Iowa).His song Take away your billion dollars (1948) inveighs against Berkelitis, the mega-project mania inspired by the huge growth of the Berkeley Radiation Laboratory in the 1930s and later by ...

RIP

Anonymous

92 years

Anonymous

Cool...I never heard of him

Emilio Pisanty

@Blue my great-gran died in 2004, too

born 1898, though =P

Slereah

1:34 PM

He was not a famous physicist

I only know him for his physics related songs

Anonymous

@EmilioPisanty Life goals! :P Was (s)he still more or less healthy at 100+ (like talk, walk a bit, etc)?

Anonymous

Women apparently outlive men

Anonymous

I have personally never met anyone who's over 100 years of age

Emilio Pisanty

@Blue sure. Walking not so much, but in full possession of her mental faculties.

Anonymous

Nice :)

Semiclassical

1:38 PM

I think my great-grandmother was over 100 when she died, and I did meet her when I was a kid, but I'm not sure she had passed that marker at that point

Emilio Pisanty

2:49 PM

0

Q: Unpolarized light - Why don't light sources then look invisible?

Pardon me if this has been asked before. I was just thinking about how light from a source like the sun is unpolarized. I have two questions: Is unpolarized light from the sun 100% random? Meaning all wavelengths in the visible spectrum, polarized in all directions? (please correct me if "polar...

that's a dupe for sure, but I'm having trouble finding the precise question

any takers?

user351417

@EmilioPisanty physics.stackexchange.com/questions/259518/… maybe?

Emilio Pisanty

@Chair hmmmm. That definitely applies. I'm pretty sure there was one specifically about sunlight.

ah, found it

148

Q: Why do we actually see the sun?

I haven't yet gotten a good answer to this: If you have two rays of light of the same wavelength and polarization (just to make it simple for now, but it easily generalizes to any range and all polarizations) meet at a point such that they're 180 degrees out of phase (due to path length differenc...

optics visible-light astronomy interference

not quite a dupe

user351417

physics.stackexchange.com/questions/200627/… maybe? Not exactly though...

ayc

Emilio Pisanty

3:08 PM

@ayc that's probably a question for the Problem-Solving Strategies room.

ayc

3:32 PM

Ohk....My bad!

Emilio Pisanty

3:50 PM

this is why we shouldn't have tags like this one

danielunderwood

Does this belong on crossvalidated? Looks like I can only flag as belonging on meta or math physics.stackexchange.com/questions/440715/…

Semiclassical

"anti-light" wave

ow

2

Emilio Pisanty

@danielunderwood that does look like a Cross Validated question

@Semiclassical it's less non-mainstream than it looks

Semiclassical

yeah, I can believe it. destructive inteference is a real thing

but "anti-light wave" is a painful phrase

Emilio Pisanty

4:11 PM

@Semiclassical oh, I agree. Even more if you think that because you just came up with it then that makes it Research Level.

Semiclassical

lol

Emilio Pisanty

so... is a Chat Session happening?

Semiclassical

well

you're talking

so i guess yes?

Emilio Pisanty

heh

0

Q: principle quantum numbers

What does principle quantum numbers actually represent? .................... The modren structure represent that electrons do not revolve around the nucleus . It says there are no shells or orbits for electron rather there is just a probablity of finding them in a certain reigon ...

quantum-mechanics atomic-physics

ugh

goodness

Anonymous

Let's dig up and discuss awful posts from the main site

Anonymous

4:12 PM

That should be today's topic

Semiclassical

seems legit

it's either that or try to find something actually interesting to talk about

and who wants that

Anonymous

@Semiclassical BTW do you find computational complexity interesting?

Anonymous

I found a nice paper that day

Anonymous

arxiv.org/abs/1607.05256

Anonymous

Hoping to read it sometime soon after my exams are over. My background in complexity is pretty weak though

Anonymous

4:18 PM

And the Bruner et al's review paper on Bell inequalities is also in the bucket list

Semiclassical

can't say i know much about it myself

Anonymous

Same here. Another thing I want to pick up is the different types of entropies in QI....I know almost nothing of those

Semiclassical

yeah

von neumann, renyi

bunch of weird stuff

Emilio Pisanty

-2

Q: What does the principal quantum number really mean?

What do principal quantum numbers actually represent? The modern structure represent that electrons do not revolve around the nucleus. It says there are no shells or orbits for electron rather there is just a probability of finding them in a certain region of space. The principle quantum number...

quantum-mechanics atomic-physics

there we go

much better

still an awful rant

but at least now it looks nice

user351417

4:33 PM

I don't really understand that question. It seems like a reasonable assumption that the OP's aware of the fact that you have azimuthal, magnetic, and spin quantum numbers, since he specifies principal quantum number everywhere, instead of just saying 'why do we have the quantum number' (though even if that was case it wouldn't be a completely sensible question).

danielunderwood

It sounded to me like he was confused about superposition resulting in probabilities, but I had a hard time understanding what he was asking

Emilio Pisanty

@Chair no, you don't get it

> SO IT IS NON SENSE TO SAY THAT PRINCIPLE QUANTUM NUMBERS REPRESENT ENERGY LEVEL OF ELECTRON BECAUSE ELECTRONS WITH SAME PRINCIPLE QUANTUM NUMBER CAN DIFFER IN ENERGY

see?

if you all-caps it then it magically starts making sense. in your head, at least.

user351417

sigh another HNQ about messing with the HUP and orders of magnitude and 'hey, the dude's still, where could he be?' physics.stackexchange.com/questions/440399

user351417

@EmilioPisanty Yes, that's much clearer. The screaming informs me that he hasn't switched caps lock off since he set up his username.

user351417

Oh, no, caps lock was off for the units. physics.stackexchange.com/revisions/429087/1

danielunderwood

4:41 PM

@Chair uhhh

Are there languages that don't have distinction between capital and lower case?

Emilio Pisanty

@Chair it's the little details that let you know how much people care

(about their text being in all caps)

user351417

@danielunderwood Hindi for sure.

user351417

I'm pretty sure Kannada too. And probably a lot of other Indian languages.

user351417

But the point is most people make the reasonable mistake of using only lowercase letters or starting each word with a capital letter.

Semiclassical

Here's a QM problem from Messiah that I'm bashing my head against

Slereah

4:50 PM

The answer is $\pi/2$

Semiclassical

One can show without much difficulty that $e^{-i\beta J_y}=e^{i \pi J_x/2}e^{-i\beta J_z}e^{-i \pi J_x/2}$

but Messiah asks you to deduce from this that every $\langle JM|e^{-i \beta J_y}|JM'\rangle$ is a polynomial of degree $2J$ with respect to the variables $\cos(\beta/2),\sin(\beta/2)$

which I know to be true (from the Wigner formula, for instance)

but durned if I can see what deduction he has in mind

random thought: I can write that as $$e^{-i\beta J_y}=e^{i \pi J_x/2}e^{-i \beta J_z/2}e^{-i\pi Jx/2}e^{i\pi J_x/2}e^{-i \beta J_z/2}e^{-i \pi J_x/2}$$

that doesn't seem productive tho

Alec

Hi Semiclassical: Can we continue our discussion here?

user351417

5:06 PM

I have no idea why someone's flagging this meta post as opinion-based, and this meta post as unclear, but just... no. For the first, there's a post on the main SE meta, and the second one contains enough links, quotes, and distinct doubts.

user351417

I see very little sense in a primarily-opinion-based flag on meta.

enumaris

am I allowed to take my own bounty if I answered my own question lol

user351417

No, never mind, we also have a typo in my search query :P

user351417

Hmm, google.com/… is much better.

John Rennie

@enumaris no. That's happened to me when I placed a bounty then realised I knew the answer. The bounty just disappears.

enumaris

5:17 PM

cry

Emilio Pisanty

5:36 PM

@Chair what?

also, upon clicking that search result:

whoa

Upon a closer look, it seems that Google is linking to https://meta.physics.stackexchange.com, which never existed

user351417

yep

user351417

I switched the physics and meta.

user351417

it's actually physics.meta.stackexchange

Emilio Pisanty

@Chair not really

you're just using the old order

user351417

No wonder something actually shows up

Emilio Pisanty

5:41 PM

it used to be meta.(site).stackexchange

user351417

google.com/…

Emilio Pisanty

but that wasn't very compatible with the switch to https

so they switched the order everywhere

user351417

that's cool; I'll hunt down the stuff on the main meta site when I have the time to.

Emilio Pisanty

@Chair the go-to place is this blog post by Nick Craver

user351417

I can't use SE in school because the school blocked imgur recently. I guess I never really spent much time on the internet at school, but it was convenient at times. More interestingly, my school network has blocked the DUNE website as "explicit content".

Emilio Pisanty

5:44 PM

otherwise

441

Q: Network-wide HTTPS: It's time

Update 2017-05-22 stackoverflow.com is now https://. I've written up a lot of what it took to get here in a blog post. Next up is chat and then https-only cookies. We'll be ramping up HSTS max-age directives as we go. I'll continue to update this post as we deploy new bits. Update 2017-03-16 ...

discussion ssl announcements

and links therein

user351417

(Though I'm not in school; it's 11 in the night here)

Emilio Pisanty

> Ok so the top level domains are easy, a SAN cert which allows many domains on a single cert – we can sanely combine up to 100 here. So what about all of our .stackexchange.com domains? A wildcart cert, excellent we’re knocking these out like crazy. What about meta..stackexchange.com? Damn. Can’t do that. You can’t have a wildcard of that form - at least not one supported by most major browsers, which means effectively it’s not an option. Let’s see where these restrictions originate.

and following text

user351417

Thanks!

Emilio Pisanty

though note the difference in dates

the blog post is 2013 and they were actively working on the transition

https deployment wasn't completed until May 2017

so, yeah, "when the hell are you switching to https!?" was a thing for a very long time

user351417

This is going to take some time to process. I don't know much how these stuff work.

user351417

5:58 PM

Quora now tells automatically anonymous visitors the number of upvotes on a post, without making them click anything! Also quora.com/…

user351417

danielunderwood

hmmm

quora seems like an interesting place

Emilio Pisanty

0

Q: Why does this Google search produce a (single) hit to the old meta.site.stackexchange scheme over https?

Someone on chat recently linked to a Google search on "closed as primarily opinion-based" site:meta.physics.stackexchange.com for some reason or other, and I'm a bit weirded out by the result: From a naive look at the query, one would expect lots of hits, but upon a second look that expe...

support ssl search-engine

thanks for sending me down a https rabbit hole there

¬¬

=P

ACuriousMind

@EmilioPisanty I'll bet money that the answer is "caching"

user351417

shouldiblamecaching.com/

enumaris

6:06 PM

interesting is a strong word

Emilio Pisanty

@ACuriousMind probably?

ACuriousMind

@enumaris Interesting is a weak word, it's interesting you think it's strong :P

Emilio Pisanty

but that combination shouldn't have ever returned content, no?

enumaris

wtf...

user351417

@EmilioPisanty FWIW even I get the warning about my connection not being private when I try that link.

enumaris

6:08 PM

why was my all named entities table deleted...

ACuriousMind

@EmilioPisanty All the meta.{site} links now redirect to {site}.meta. I'd say redirecting is returning content, no?

@enumaris Looks like your entities prefer to go incognito

enumaris

oh my...those dudes moved the table to a different schema

am I allowed to write to that schema...

Emilio Pisanty

@ACuriousMind but would Google tack that under the old url?

user351417

@EmilioPisanty This is going to end up status no-repro

enumaris

I don't think I can save to that schema...it default saves to my user folder

user351417

6:11 PM

enumaris

freaking a

ACuriousMind

@EmilioPisanty We'll need a Google insider to answer that :P

Emilio Pisanty

@Chair I take issue with your link

user351417

Oh, never mind

Emilio Pisanty

=P

user351417

6:12 PM

@EmilioPisanty sadtrombone.com

enumaris

6:23 PM

welp, trying it out, let's see if I can write to that schema lol

danielunderwood

Kidnap the DBA!

enumaris

if they don't allow me to write to this schema, the stored procedure they approved is useless lol

I had to write a stored procedure to produce a table from the source table that I produce in Python...they insisted that the SP had to go in a different schema...let's see if I can write to that schema using python...

saving...

at least it did not hit an access error or something

ooo the script completed

well then

I guess that's fine

Anonymous

> I often demonstrate LaTeX in combination with Vim. I will build a LaTeX file and then compile it into a beautiful PDF using a template I have. I also demo my letter and resume templates. I stress how important it is to break up style from content. By this point, people are no longer interested in what I have to say and regret speaking to me.

They look for a way out of the conversation, and I go back to writing. Vim is a religious experience more than a word processor.

Anonymous

Lol, that's some dedicated fanbase :P I'm stealing that last line btw

Anonymous

20

A: How can I inspire others to use vi/Vim?

I use Vim for everything. I mean everything. Programming, word processing, writing novels, etc. Everything. I have been sitting at an auto dealership using a Surface Pro 3 running a Linux Virtual Box with Vim and had people strike up conversations with me about what I am doing. Just use Vim. Peo...

danielunderwood

6:34 PM

I used to use vim for everything...now I don't

I still use it in ssh and such, but using a bunch of extensions to essentially make it an IDE just made it slow

Anonymous

I used to use Atom. Never used Vim. Yeah, the extensions get messy to handle after a while

danielunderwood

Yeah I used atom for a bit, but that was ridiculously slow

Now I use vscode as a general editor and it's quite nice

Though I use pycharm for python and VS for C#

And occasionally jupyter

Wrichik Basu

@Blue sorry for the interruption. I believe you've done Prof. Balakrishnan's course in QM. Does he do quantum treatment of Hydrogen atom towards the end?

enumaris

lol

I just use sublime text

Anonymous

I really like the Visual Studio interface for coding although it's a bit heavy. It's debugging features are just awesome. Not suited for Python however

enumaris

6:38 PM

It's pretty

form over function is my motto

danielunderwood

Yeah I don't really care for plain VS as it seems to be clunky and slow for me. But it's better than anything else for C#

I also used sublime at one point. Don't know why I stopped though

Probably the constant "buy now" and I didn't really have money to pay for it

Anonymous

@WrichikBasu Yes, he does. Around lecture 14 I think

Anonymous

I forgot the order of the lectures

danielunderwood

Oh joy. I just ran something that was taking ages and it failed when it was almost done

Wrichik Basu

@Blue I am in lecture 15. Maybe he does them towards the end. And what about Fermi-Dirac and Bose-Einstein stats?

Anonymous

6:42 PM

@WrichikBasu Umm, no FD or BE

Wrichik Basu

@Blue OK, thanks.

Anonymous

@WrichikBasu Iirc he doesn't show the full derivation of the H solutions from the Schroedinger equation. Keep in mind that It's not an introductory course in QM

danielunderwood

Is it normal to talk about stats in a QM course? We talked about symmetry of fermion/boson wavefunctions, but the stats discussion was in our thermal course for whatever reason

enumaris

stat mech is generally tied with thermo

Anonymous

@danielunderwood It isn't normal at all. We too learnt it during our statistical mech course :P

enumaris

6:54 PM

but sometimes a QM course will mention it as some limit

danielunderwood

Ahh I thought we were just weird

Anonymous

Btw how's reading Zwiebach going? @danielunderwood

danielunderwood

Uhh I got a bit distracted. Now I'm reading Schwitenberg's Physics from Symmetry, which seems interesting but I think leaves a fair bit of detail out

Anonymous

Is that a String Theory book? Never heard of it

danielunderwood

*Schwichtenberg

Anonymous

7:04 PM

> It starts by introducing, in a completely self-contained way, all mathematical tools needed to use symmetry ideas in physics. Thereafter, these tools are put into action and by using symmetry constraints, the fundamental equations of Quantum Mechanics, Quantum Field Theory, Electromagnetism, and Classical Mechanics are derived.

Anonymous

Nice, I see

danielunderwood

Yeah that. I was curious since I don't really know anything about the group side of physics. I'm still in the math intro though

ACuriousMind

I haven't read the book but I immediately distrust any book that claims to "derive" the fundamental equations of any physical theory

There's a certain tendency among some theorists to elevate symmetry above all else, it's always weirded me out. Symmetries are very useful, but making them first principles strikes me as the inverse of how we usually develop physical theories, where we model (an abstraction of) the real world and then observe there's symmetry in our descriptions.

Why would anyone start with "I want a theory that exhibits symmetry group $G$!"?

danielunderwood

I'd be curious to hear what people around here think of the book. I haven't reached the "derivation" part of the book, but my understanding is that he starts out with certain groups to demand symmetry under and goes from there

ACuriousMind

Yeah, that doesn't sound enticing to me

danielunderwood

7:17 PM

I think it's more of a "What does a theory symmetric under G look like?" than "I want a theory that is symmetric under G" isn't it? Though certainly cherry-picking the groups that work isn't a derivation

enumaris

symmetry is life

symmetry is love

bolbteppa

@danielunderwood looks good

Chapter 3 is basically something you zoom through in qft course to get reps of the Lorentz/Poincare group, e.g. chapter 2 of Ryder's QFT, chapter 3 is about actions, e.g. chapter 3 of Ryder, the rest would similarly set one up to read Ryder's qft I'd say

Slereah

7:41 PM

So can we unban @0celo7 anyway

I need someone to yell GR at

enumaris

just yell it out loud to everybody

danielunderwood

@bolbteppa yeah chapter 3 is where I'm at now. The next section looks like a treatment of SU(2), so hopefully it'll help to have an actual full example

enumaris

SU(2)=SO(3)

waits for world to burn

danielunderwood

Evidently they're both representations of $S^3$ if the book is correct

I'm still trying to wrap my head around the book talking about groups as manifolds though

bolbteppa

@Slereah pardoning/paroling @0celo7 might be a better thing to call for, maybe someone can sponsor him

Slereah

7:48 PM

@enumaris Nobody answers

Those jerks