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21:04
oh wait i recall. i think i got it
derp
@ACuriousMind i think it is this at play again
@SillyGoose what do you mean? the number of (unique) pairs of $N$ objects? it is $N(N-1)/2$.
sorry if I misunderstood the question
anyway; why so many messages have been removed lately? or is it just my impression?
wait i take it back i think it does not make sense. i think it just validates my thought ://
@Relativisticcucumber there is? :d
@TobiasFünke because people cannot behave appropriately :P i think over break there's more time so people engage more on stack, so behaviors should be amplified
@TobiasFünke i think so. i know of at least 4
hi
21:18
hi allie
im a kitty
@Relativisticcucumber yeah, could be true
@Allie lol
do you think about the path-integral approach to QM when thinking about CM @TobiasFünke ?
@SillyGoose nope, not really. I only learned the basics of path integrals, but never used it in my work so far, sorry :d
i was just curious. because i am trying to gauge what sorts of things i should look into more.
21:22
wait i think i got it for real
@SillyGoose well, it certainly is useful!
@naturallyInconsistent I'm simply gonna say that you've misunderstood my point and this was a bugbear for my former colleagues
the overlap is zero i think
I meant really just my personal work
i quite like the feynman approach to the 2D ising model, for instance, which looks very much like a "path integral" inspired approach. the onsager and etc. approaches seem very computational, harder, and not illuminating...
21:24
hmh
I have a question regarding the US uni system, if you allow
i don't mind attempting an answer
you do your Bachelor in e.g. physics, and then apply for PhD positions, correct?
but you then have classes one or two years? do you have to decide the topic of your thesis already beforehand?
I think it depends. I did my bachelor (4 years), then I applied for PhD programs in my 4th year. But I think a non-negligible number of people do Bachelor -> Master -> PhD route even in the states (I have heard especially for people in hep-th).
@TobiasFünke I think it is generically true that US PhD programs have 1-2 years of courses before starting research. I am not sure when exactly one needs to have their thesis topic decided though.
21:27
also RAs are common
and so when you apply for the PhD, do you have to fix a topic already? or how is it going? to you apply for a certain position in a research group or at some uni?
@Relativisticcucumber RA?
@TobiasFünke i think one's outcomes are better if they have a specialization in mind and experience in that specialization already. in my experience, one is asked to state (though not required) what people they want to work under in the written statements for the application.
@SillyGoose its different for every program
yeah that's what I am wondering
some programs / unis you can apply basically to a professor but some you can only apply to the entire program
21:29
@naturallyInconsistent don't forget the Anderson-Higgs mechanism ;)
I see, thanks to both of you. Interesting
but for instance, at one school i was rejected because none of the professors i expressed interest in had funding for more students. but they emailed me and asked if i wanted to be accepted anyways to see how it goes.
hi
i want my decisiomns to come back
im impatient
@SillyGoose oh
@Allie morning
wait @Allie im p sure we go to the same uni
21:32
@Allie when do you think you will know? did they give you a date or so?
or like i mean i graduated
@Relativisticcucumber xDDD
in the next month, hopefully
i met tuckerman at a quantum chem conference this summer
as early as next week but i doubt that
unless i got into columbia or princeton but i highly doubt
NYU is supposed to be early feb, and i have contact with the professor there but certaintly not guaranteed an acceptance
21:35
@Allie oh wait maybe i misunderstood i thought u were like meeting tuckerman in person like u go to nyu
ohhh no
i go to a tiny college in NJ
i am hoping to go to nyu. thats like my top choice
@Relativisticcucumber he seemed really nice
im meeting him this week to talk about his research and stuff, he already said he thinks id be a good fit for his group and i think his stuff is really interesting
well good luck to you
thank u :3
does anyone have a recommendation for a text that could give a brief introduction to lagrangian and hamiltonian mechanics?
im sure i could get through this stat mech chapter with my very barebones understanding of them but i do want to have a solid foundation
21:54
@Allie do you want rigour/classic or do you want gentle
hmmmmmm
id say somewhere in between
because i dont want to spend too much time on this, im not a physicist. but also i do want something that's not really hand-wavy and will give me good intuition
gentle I would say hand and finch's analytic mechanics is not too bad
the classic is Goldstein
I'm not a big fan but everyone else loves it I guess
oh i had borrowed that book for a bit and i never read it lol
was too busy
no time like the present
:)
well i mean i borrowed it from a professor and schools out. but i will find the book
21:59
time for work now :'(
bye!!!
bye bye
22:11
have a nice day
I'll go to sleep now hehe
@qwerty The true classic is en.wikipedia.org/wiki/…
There is an interesting story about Dirac having the idea about the analogy between the Poisson bracket and the commutator but he wasn't quite sure about the form of the Poisson bracket. He knew it was in that book but it was Sunday and the library was closed so he anxiously waited the whole night
@Allie Leonard Susskind has a video lecture series on Classical Mechanics that makes everything extremely clear
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