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12:03 AM
haven't seen @MarkMitchison in some time.. wish I could talk to him...
 
@TAbraham it was a time when in USA was a real public panic about the unidentified objects, and the government gave disposition to "explain" all the cases. Many explanations were simply invented, as balloons from stations that didn't raise any balloon at the specific time, and so. Therefore, nobody can be sure that these are not alien objects, all the more that they have a common feature. Fly away at a speed unattainable by human techniques.
@TAbraham this is the worrying feature. A friendly visitor identifies himself, doesn't watch us and flies away.
@HDE226868 I have an additional question to you, I am going to post it.
 
12:24 AM
@Sofia Ask away!
 
 
2 hours later…
1:54 AM
A question I ask myself about UFOs is: If the gov't at some point revealed that they do actually exist, would I be surprised?
 
 
1 hour later…
3:07 AM
@Danu Agreed with Dirac, not so convinced on Bohr.
 
3:20 AM
@Jiminion "Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering."- Arthur C. Clarke
 
3:38 AM
@Gaurav Or we could be not alone but they are very very very far away, which is sort of less staggering. But I appreciate the point.
 
4:01 AM
My wife & I get a once-in-while treat to go out without the kids and got a babysitter
Inclement weather (icy rain) killed the plans
We reluctantly let the babysitter drive home
She drover her car into a ditch about 0.5 km from the house
She's totally fine, as is the car.
But with the weather, AAA couldn't get to her at all
So she's crashing with us tonight & I sorta feel bad for letting her drive off in the first place
(NB: crashing with us means sleeping over)
 
@KyleKanos: So she crashed near you, and then with you?
 
@DanielSank Yes. But do note the different meanings of crash
 
4:20 AM
@KyleKanos So you are paying for a young woman to spend the night at your house....hmm.
 
 
3 hours later…
7:44 AM
Hmm, maybe that was her plan all along... :)
 
8:19 AM
@KyleKanos Maybe you should consider reading the biography by Pais (who also wrote one on Einstein)
Bohr's own work may not have been as impressive as e.g. Dirac's, but his influence was enormous.
 
8:44 AM
@Sofia in this SE, I am not sure who is the black hole specialists are (there are bound to be a few), I know 2 in real life though (they are not members here)
 
 
2 hours later…
10:39 AM
Ping
 
10:52 AM
@TAbraham I know the Wikipedia page only covers the two state system. What I asked you to do was to familiarize yourself with the analysis, and to pick the constants a, b, c, d so that it corresponds to the one-site problem (with your Hamiltonian). Generalization to two-site should be rather easy (for one site you have a 2x2 matrix, for two sites you'll have 4x4; you'll get some "off-diagonal" elements from the Vij corresponding to "interaction" between the sites).
 
 
3 hours later…
1:36 PM
Stack Exchange is currently offline. Sad Jim is sad
 
Which one? Or the entire Jim collective?
 
Jiminion sounds like Jim's minion :P
 
@Neuneck It is >:)
@Jiminion Clearly I specified that Sad Jim is sad
 
@Neuneck Only for a month.
 
2:08 PM
@Jiminion I don't appreciate that insinuation.
 
0
Q: domestic lighting - live wire is live, neutral is not

DanA ceiling light has failed and i have removed it. The circuit that it was part of (eight other downstairs lights) is working fine. BUT the supply cable from this circuit to the failed light is 'live' for the live wire but not 'live' for the neutral. So my replacement light fitting is not workin...

better for Home Improvement or EE.SE?
 
@JimdalftheGrey DIY.SE
 
@JimdalftheGrey Home Improvement I would say.
'Course, I know nothing about what is on-topic over there.
 
@KyleKanos Is that a new one?
 
Home Improvements URL is DIY.StackExchange.com
 
2:15 PM
My god. Shows what I know
 
I find calling it Home Improvement rather funny because of Tim Allen
 
I've sent it on its merry way. Hope they don't get angry with me.
 
@KyleKanos I agree
Tool Time with Tim "the Tool Man" Taylor
 
3:10 PM
@KyleKanos I will turn your face to alabaster.
 
3:52 PM
Also your caps lock button appears to have been on when you wrote the title. You should consider fixing that. (he said, blatantly ignoring the probability that caps lock was intended) — Jimdalf the Grey 47 mins ago
@JimdalftheGrey: One reason why caps lock should be entirely non-existent
 
4:10 PM
@KyleKanos It can be useful. But I think the benefit of removing arbitrary yelling on the internet outweighs the detriment of an inconvenience when it is actually useful
 
I cannot actually think of one instance in which I needed the capslock
Just a week or so ago, I actually disabled it in my system.
It doesn't do anything now
 
If you are quoting someone who was yelling quite loudly while saying a long statement, then it would be helpful
If you have a ridiculously long acronym, it could be helpful
If you are typesetting a derivation where all of the constants and variables happen to be capital letters, it can save effort
 
For (1) copy-paste. For (2) (a) what is "ridiculously long" and (b) most editors have change-case hotkeys
 
What if for (1) it was a video, not a written source
 
For (3) wrap all those capital constants into a new constant
Then exclamation points can just as easily emphasize yelling
 
4:16 PM
Exclamation points denote a sense of finality, strength, or amplitude in what is said, but that is usually applied to the end of the sentence. Like, it could mean the end of the statement is emphasized or said with gusto, but the remainder of the statement could be read as not being yelled. All caps makes it clear that the entire statement is yelled
For (3) that's not always possible
But all in all, one can just press Shift to get all caps. It's inconvenient, but the benefit of making it harder for people to caps lock on the internet is worth the minor inconvenience
 
4:29 PM
STOP FIGHTING!
:(
 
@Jiminion We were actually agreeing. It's just that we were agreeing agressively
2
 
0
Q: If a theory gets two predictions right, how likely it is that the rest of the predictions are true too?

GodThe question lucidly defines what I am trying to inquire, so there is no need to elucidate it any further. Another question would be, General/Special Relativity has gotten some predictions right as experimental evidence is backing it up, but is there anything that it got wrong?

Should this question be closed as being primarily opinion-based, too broad, or unclear what you're asking?
 
@Qmechanic I voted too broad, based on Jimdalf's comment.
 
5:00 PM
@Qmechanic It should be in philosophy or someplace like that. It's a valid question (as far as that goes) but it is not specific to physics.
 
 
1 hour later…
6:11 PM
@Jim What is George Burns? Chopped liver? — dmckee ♦ 38 mins ago
@dmckee You did that on purpose didn't you
You knew there were 2 Jims and we wouldn't be able to tell who you were pinging
 
Who is George Burns?
 
someone over whose kentucky home the sun shines brightly
 
user54412
@ACuriousMind I'm as lost as you are.
 
I actually don't understand the entire comment thread there starting from Charlton Heston
Though "Morgan Freeman" indicates that all mentioned people probably played God in one form or another
 
user54412
I think those are people who played God
 
6:15 PM
He was a famous entertainer
Great voice too. A comedian, has good quotes. Essentially I'm saying you should look him up
 
Uh, I don't recall Heston playing God
He played Moses in The Ten Commandments
 
@KyleKanos No, he just did a lot of Godlike things, like playing Moses and being a Jesus character (even dying on a crosslike structure) in "The Omega Man".
 
Yeah, I didn't agree with that one either. But asking if the OP (whose display name is God) is Heston indicated to me that they were trying to make a reference to actors that played God
 
But Morgan Freeman played God in Bruce Almighty
 
6:20 PM
And Evan Almighty
 
George Burns played God in "Oh God" with John Denver.
 
user54412
Almost an Angel, uncredited role as God, says IMDB
 
@JimdalftheGrey Yeah, I forgot about that one
 
@ChrisWhite But does uncredited really count? It was probably just his voice
@KyleKanos As everyone should
 
@ChrisWhite How's the weather?
 
user54412
6:23 PM
@JimdalftheGrey Isn't the voice the quality that determines suitability to play God anyway? I mean, think about Morgan Freeman
 
@ChrisWhite Sure, but he also looks the part
 
user54412
@KyleKanos A good deal of very powdery snow. Much calmer than what I hear the South got.
 
user54412
Perfect for skiiing
 
I got freezing rain.
 
I heard that today Toronto is colder than the North Pole
my thoughts: wow the North Pole is warm today
 
user54412
6:25 PM
further reinforcing America's belief that even southern Canada is frozen solid all year long...
 
Well since we don't believe that time periods outside of hockey season exist, I'd say we're pretty sure it's frozen all year too
Except Vancouver. Those bastards never get snow
 
What's the standard proof of $\operatorname{det}(1+\epsilon M)=1+\epsilon\operatorname{tr}M$? Use $\operatorname{tr}\log M=\log\operatorname{det}M$?
 
0
Q: Why is the Heaviside step function named after Heaviside?

Emilio PisantyThe Heaviside step function is usually defined as $$ \theta(x)=\left\{\begin{array}{ll}0&\text{if }x<0\\\tfrac12&\text{if }x=0\\1&\text{if }x>0.\\\end{array}\right. $$ It is remarkably simple and doesn't take a lot of work to define, though if used properly it does play an important role in a n...

 
@0celo7 Are you telling us to use a specific equality because this is part of a homework assignment?
 
@JimdalftheGrey I don't ask homework questions because I'm in high school. So, no. I can see how it follows from expanding that identity as a power series, but is that the standard proof?
 
6:33 PM
@0celo7 Yes, it is, as far as I know.
 
@ACuriousMind Thank you.
 
@0celo7 If you're a high school student, then this is either a pure math problem or it's not high school level physics..... I'm not sure where I'm going with that, just felt like pointing it out
 
@JimdalftheGrey It isn't high school physics. Weinberg uses it in his analysis of Fadeed-Popov. I'm an avid self-studier.
 
Good. Good.
 
@ACuriousMind Is the "parameterizing our ignorance" argument in renormalization actually good or is it just something books tell students?
Like, do professors or researchers actually say that when they introduce a cutoff?
 
6:40 PM
Can you folks just read that meta math stuff or is there some switch to turn it on? (It's like you can read the Matrix directly....)
 
I just read it
 
@0celo7 Hmmm. I have never heard someone phrase it like that, so it is not universal.
@Jiminion The ability to read pure TeX is not granted to lesser minions, unfortunately.
(but a workaround for those thus cursed is linked on this very site)
 
@ACuriousMind Oh, I heard it from Zee in a lecture (and his book). He said something like, "Renormalization is totally physical. Our field theory is good up to some energy $\Lambda$. We cut it off there to parameterize the ignorance of our field theory."
 
90
A: Should chat have TeX support?

robjohnI will leave the original post for historical reference, but as mentioned in the Update below, all four bookmarks are located on this installation page. There are four bookmarks: start ChatJax installs MathJax and starts a loop that renders $\LaTeX$ as needed. This is intended for use in chat, ...

 
@JimdalftheGrey Guilty as charged.
 
6:44 PM
I knew it!
 
@0celo7 I think the last sentence is superfluous - it's enough to say "Our theory is good up to the cutoff", and I'm not really sure what "parametrizing our ignorance" is supposed to convey that is not already in there.
 
@ACuriousMind I'm paraphrasing, mind you. He said it multiple times in a few different ways IIRC.
 
@ChrisWhite Burns' God is a very easy-going kind of guy. Not much old testament in that portrayal. It's also a little before my time, but I know from late night television, back in the days when broadcast was still bigger than cable in most markets.
 
@0celo7 Yeah, but "parametrizing our ignorance" sounds pompous either way. I much prefer the simple statement that the cutoff is the point up to which the theory is considered good.
 
@ACuriousMind It's actually easy to read TeX, it just gets a little tricky when you start having many nested braces.
 
6:47 PM
Then again, I have only superficial knowledge of RG techniques, so perhaps the RG people all say it like that
 
Me and my entire degenerate race curses you...
 
@JamalS Yeah, but it kinda defeats the point of writing it in TeX in the first place, doesn't it?
 
@ACuriousMind Nawh. It gives us a standardized way to represent math in plain text.
 
@ACuriousMind When reading Weinberg, can I just skim the RG chapter? I'm not really up to doing that many integrals. How important is RG for, say, string theory?
 
user54412
I personally write pseudo-tex, here and in emails. I figure it's maximally annoying.
 
6:50 PM
@0celo7 Not at all for the latter, because ST is UV-complete.
 
@ACuriousMind how would you write it so that it's clear if you knew you couldn't display it properly?
 
@0celo7 Yes, but you should understand things like beta functions.
Einstein gravity emerges from bosonic string theory by doing renormalization.
 
Okay, you people are right, there is a point in writing TeX even if not displayed
 
I write TEX in my AP Physics Skype chat. It's pretty annoying.
 
AP?
 
6:52 PM
high school
 
advanced placement
 
Aaah
 
But, @0celo7, renormalisation is something you should know because effective field theories are quite important.
 
@0celo7 Oh my god, I just saw your profile, 'CFT is boring.' What?!?
 
@ACuriousMind I'm doing this for fun. I have to maximize learning while not being bogged down by horrendous calculations.
Lol
 
6:53 PM
@JamalS Hahahaha
 
@0celo7 One doesn't learn physics by reading physics, one must also do those horrendous calculations! :)
 
CFT is awesome. (But I also hate actually doing calculations)
 
I've heard the yellow book is really good.
 
^ CFT is absolutely awesome
That's the one I use, by Di Francesco.
 
But it's really expensive and I can't find a PDF.
 
user54412
6:54 PM
Calculations: the reason I went into GR and astrophysics rather than QFT and such
 
The "yellow book" is for me just where you (used to) look up phone numbers :D
 
@ChrisWhite Weinberg's Cosmology is next on my list. Those calculations look worse than QFT.
 
QFT isn't that bad - how many loops have you gone up to?
 
@JamalS Is Di Francesco worth the money? Will it stay on my shelf for the rest of my life, like Shankar and Wald?
 
user54412
@0celo7 Understand that Weinberg is a particle physicist. I think having a fetish for horrendous calculations is a requirement for that field. I don't think cosmology has to be that way.
3
 
6:57 PM
@0celo7 I haven't used Shankar, but I don't think it will sit on your shelf if you actually want to learn CFT. It's in my opinion the best book for it.
 
By stay on my shelf I mean will I keep it around forever
 
Ah, yes. It's good for looking up a quick formula I guess.
You know there are people that upload free PDFs online, right?
Not that I'm recommending you download them... I'm not recommending you download them...
 
@ChrisWhite I flipped open Cosmology. (6.1.17) is a six-line Boltzmann equation.
 
Of course, I can't control what you download... :)
 
@JamalS I might have looked. But my google skills are bad.
Not that I looked.
 
user54412
7:01 PM
@0celo7 Is there a library near you? Especially a university library?
 
@JamalS Profile updated
 
@ChrisWhite No.
I get all my books.... online wink wink
 
@ChrisWhite: No, I took classes at a community college over the summer, but they won't have anything like that.
 
Oh, that wans't @ me, woops
 
user54412
I personally like having books on my bookshelf. It gives my office an atmosphere of studiousness.
 
7:03 PM
@ChrisWhite You should take up book binding
 
@ChrisWhite I know I could just wait until I go to college, but I'd be wasting a lot of time until then when I could be learning CFT and ST.
 
It's very relaxing and surprisingly fun
And you get good looking books to put on your shelf
 
I already have a list of journal articles to read for when I get a university pass.
Or if.
Hopefully when.
 
::chipper voice:: OK, everyone! Clap your hands if you believe in @0celo7!
::clap clap clap::
 
I am a floating skull. I can't clap. I will cheer, however.
 
7:05 PM
If you care enough to do physics in your spare time, you'll make it.
 
@0celo7 Don't worry, you will get into a university. The dumbest people in my class have, so you definitely don't have to worry. Just be positive.
 
user54412
@JamalS If I ever had money to spare, I'd actually have my textbooks rebound in nice matching leather or something
 
@JamalS I've been accepted to Tennesee Honors.
@JamalS Fusion path
 
@JamalS Are you threatening to make him come to my school? Poor guy. We'll do our best for him, but...
 
I just want to get free journal articles at this point
Also a decent library.
 
7:06 PM
@0celo7 Did you apply to MIT, Princeton, etc.?
 
@JamalS No, I want to study Nuclear Engineering.
Physics is a hobby.
 
You are actually learning QFT and GR and all that without ever intending to use it?
 
It's fun.
 
I suppose it's too late to plug Kansas State (you can leave with a operator's cert for their TRIGA) and UCSB, but they're both good school for that.
 
user54412
@ACuriousMind Getting philosophical, what do those of us who "use" QFT and GR actually use it for? More QFT and GR? :P
 
7:08 PM
@ChrisWhite GPS
I have no idea what anyone uses QFT for
Or any other GR application besides GPS lol
 
@ChrisWhite Well... yeah... of course!
 
@ChrisWhite Absolutely right.
@0celo7 Well, all the collider experiments rely crucially on the scattering amplitudes from QFT
 
@0celo7 Well, how are you going to work out coupling constants from experiment without QFT? :)
 
Though we would not be doing these experiments if not to test QFT :D
 
^ Ah, ACuriousMind beat me to it
 
7:10 PM
I toyed with the idea of nuclear medicine for a while, then I found out that every M.D. program requires clinic hours.
Do normal people use colliders?
 
Ewww, touching actually people? Gross!
 
@JamalS Touching sick people.
 
Better get a hazmat suit.
 
@0celo7 No, I admit it is all rather ivory tower stuff :)
But I like my ivory tower.
 
Anyone here aware of a good book on the physics of the Manhattan Proj.?
 
7:11 PM
@0celo7 Nuclear medicine places employ physicists in non-touching-people roles.
Maintaining the kit and designing exposure programs and such.
 
@0celo7 I remember there was an archive released of documents from Los Alamos during that time - worth a look.
If I recall correctly there were some textbooks in there, as well as papers.
 
user54412
@0celo7 So with your generation I wonder if nuclear engineering is dominated by fission or fusion
 
Good money and I'm told the MDs treat you like a colleague which they don't usually do for any non-MDs.
 
My dad promised he'll read a physics book when I'm at college and discuss it with me. I think a Manhattan Proj. book would be cool.
 
@dmckee Well, you better not piss off the guy who's responsible for making the radiation hit the patient and not you, right?
 
7:13 PM
So something more pedagogical than a stack of documents.
 
@0celo7 Feynman lectures or the Feynman autobiographies?
By the way, does anyone know if Feynman used a ghost writer?
 
@JamalS I don't think Faddeev or Popov wrote for him ;)
 
Do the Feynman lectures specifically have a section on the bomb?
 
@ACuriousMind Awww, high five.
Good one :)
 
You just gotta love ghost jokes. I think someone in here wanted to dress up as a FP-ghost for Halloween
 
7:17 PM
How were they going to do that? Dress up as a dotted line?
 
lol
 
I don't recall who it was or the details, unfortunately
Could it have been @DavidZ ?
 
For Halloween, I was thinking about being an integral. Just thought it would be the most practical.
 
Did the Manhattan Proj. physicists use QFT or just QM?
 
@JamalS You gotta be a scary one, though!
@0celo7 Hm, no idea.
 
7:19 PM
@ACuriousMind Scary? Certainly not a contour integral then :)
 
user54412
@0celo7 I always had the impression they used duct tape and intuition.
 
@ChrisWhite Please, they weren't engineers.
They had slide rules too.
 
@ChrisWhite And aluminum foil and white household caulking. Tubes and tubes of it.
 
Anecdote: Feynman and his team stored precious metals which could be stolen as everyday household objects, e.g. a solid gold doorstop. (Los Alamos, WWII.)
 
(I really have used both of those things on real particle physics experiments.)
 
7:20 PM
@JamalS lol...did they really have trouble with thieves?
 
We actually avoid duck tape: that sticky residue.
 
They certainly had trouble with spies, there were at least two I think.
 
@dmckee duck tape? ;)
I wouldn't use that, either
 
@ACuriousMind There was a hole in the fence around Los Alamos for a while, and it was only repaired when Feynman complained about it in a letter to his wife. (It couldn't be censored because it was phrased in the form of a criticism of the administration.)
 
@JamalS Ha, right, I've heard that before somewhere. Perhaps even from you
 
7:22 PM
@ACuriousMind There is actual a brand by that name these days, even if that was my fingers thinking faster than my brain.
 
Yes, I posted it here a while ago.
 
@JamalS I was told by someone who worked at LANL at the time that the hole in the fence was made by teens. The director told the repairmen to not fix the fence because the kids would just do it somewhere else.
 
vzn
what do kids want to do with LANL?
 
Take over the world
 
My dad got my brother an internship at LANL when he was an undergrad. My brother never showed up.
 
vzn
7:26 PM
reminds me of back to the future
 
By the way, does anyone have any interesting problems that span around 10 pages which are accessible to at most a second year undergraduate or so? I need to write something up for a high school math assessment, and I don't want to risk having another 'too complicated' paper rejected.
 
@JamalS What do you want it to be about? What area of math?
 
In mathematics, a brachistochrone curve (Ancient Greek: βράχιστος, brachistos – “the shortest”, and χρόνος, chronos – “time”), or curve of fastest descent, is the curve that would carry an idealized point-like body, starting at rest and moving along the curve, without friction, under constant gravity, to a given end point in the shortest time. For a given starting point, the brachistochrone curve is the same as the tautochrone curve. == The brachistochrone is the cycloid == Given two points A and B, with A not lower than B, only one upside down cycloid passes through both points, has a vertical...
 
If you do that, are you going to teach variational methods?
Or let them go at it the old-fashioned way?
I have a burning desire to teach my calculus class contour integrals. Don't know why.
 
@KyleKanos Someone in my class is actually doing that.
 
7:30 PM
You got scooped
:D
 
I actually wrote up the roots and weights method of representations of Lie algebras, but it ended up being too long and 'complicated.'
 
What about the related Tautochrone?
A tautochrone or isochrone curve (from Greek prefixes tauto- meaning same or iso- equal, and chrono time) is the curve for which the time taken by an object sliding without friction in uniform gravity to its lowest point is independent of its starting point. The curve is a cycloid, and the time is equal to π times the square root of the radius over the acceleration of gravity. The tautochrone curve is the same as the brachistochrone curve for any given starting point. == The tautochrone problem == The tautochrone problem, the attempt to identify this curve, was solved by Christiaan Huygens in...
 
@JamalS Not that I'm that smart, but that's too hard for high school. (The Lie algebra thing.)
 
@KyleKanos Yeah.. she's doing both. I've been double scooped.
 
She's a mean person
 
7:34 PM
lol
 
@JamalS What kind of high school is this? It it's public, they most likely won't know anything beyond Calc II. (Even then no hyperbolic functions or trig substitution.)
 
@0celo7 It's IB, and private fancy pancy, as someone on here said.
They're not doing anything beyond Calc II. though.
 
Volume of $S^n$ too much?
Oh
Stereographic projection of $S^2$ into $\mathbb{R}^2$?
 
Hmm, would WKB be too much for high school?
 
Yes
 
7:38 PM
Probably
 
We can solve at most linear first-order ODEs
 
What's there to it other than shoving in a series and truncating?
 
You might want to spend more time looking at Classical Mechanics problems
 
(Ignoring the subtleties, e.g. turning points.)
 
@JamalS In my school, we don't cover series until late April.
 
7:40 PM
Oh, well I can assume knowledge acquired by the end of the course.
@0celo7 In the IB, the first thing is series :)
 
Is IB "better" than AP?
 
I guess if you're covering WKB in a purely mathematical context, e.g. $\sum_{i=0}^Na(x_n)\frac{d^iy}{dx^i}=0$ without introducing wave functions, it might be okay
 
What about something from here: mathworld.wolfram.com/…
@KyleKanos Yes, it would be purely mathematical.
It's useful for things other than the Schrodinger equation
@0celo7 I don't know since I haven't done AP, but I imagine they are both equally trivial.
 
I guess I just don't know of a non-QM use of WKB
 
So no physics at all?
 
7:43 PM
@KyleKanos Potentially any DE of the form $\epsilon y^{(n) }+ a_1(x) y^{(n-1)} + \dots + a_q(x)y^{n-q} = 0$.
 
Supposedly.
:D :p
 
Hmm, maybe the Frobenius method?
Then I can introduce hypergeometric functions at the end.
(Of course, one couldn't do it justice without then going to the Meijer G function, but that's too much since you need contour integrals then. Interestingly, the Meijer G function is used for symbolic integrators.)
 
can you teach contour integrals?
to them i mean
 
@0celo7 No, this isn't going to be marked by anyone in the school. It's marked by a stranger, an examiner.
If I need to introduce a new formalism, it needs to be in the paper.
 
10 pages can't do contour integrals justice
also I guarantee a lot of them don't remember too much about complex numbers
 
7:47 PM
My class isn't that... daft :)
 
My calc class forced the teacher to delay a test because integration by parts is hard or something else trivial.
 
lol, and I thought my school wasn't disciplined. Tests are never delayed.
 
This one guy who is supposedly going to MIT cried loudly enough.
 
MIT decisions aren't for another 3 weeks.
 
I finally got an iPad so I can read lecture notes in class.
 
7:49 PM
I have 3 weeks left before utter bliss or insufferable melancholy.
 
By "supposedly" I mean he has no chance in hell
 
@JamalS If variational calculus is already taken, how about something from stochastic calculus? Or differential geometry in some restricted context (like surfaces)?
 
I'm a bit baffled by MIT's admissions process. I don't see how they can assess candidates' academic abilities without an interview like that of Cambridge or Oxford.
 
vzn
Jamal theres always the collatz problem =D
 
@alarge They won't know multivariable calculus.
 
7:52 PM
Algebraic curves, then :D
 
TOPOLOGY
 
Calabi-Yau manifolds!
 
Use @ACuriousMind 's interval example!
Confuse the grader!
 
@0celo7 Confuse the grader = fail; 'the student cannot communicate clearly.'
 
vzn
twin primes problem also in the media a lot with zhang.
there was New Yorker article/ video on him recently.
 
7:54 PM
@vzn I don't like number theory :)
 
vzn
:(
 
Man, I find number theory so boring
Heh, Jamal was quicker
 
vzn
sacrilege/ hurts my ears
 
Number theory is as exciting as CFT
 
lol
 
7:55 PM
It's depressing how you need partial derivatives for everything.
 
@0celo7 You find partial derivatives depressing?
 
@0celo7 Erm.. why? They're completely trivial, in the sense they barely differ from a regular derivative.
 
No I find high schoolers not knowing partial derivatives depressing.
Guys I know partials obviously
 
I assumed that - you must know them to find them depressing ;)
 
I don't see why partial derivatives make such a fuss then, just hold everything constant except for the variable...
 
7:57 PM
I don't follow, though. When I think CFT, I think Virasoro algebra, not partial derivatives.
Or was that comment completely unrelated to CFT?
 
I think confusion with partial derivatives is why a lot of people find thermodynamics quite difficult at first.
 
Random thoughts @ACuriousMind
 
Or, conformal blocks, or operator product expansion, etc.
 
vzn
fractals are an interesting math area. lots of applied/ physics connections.
 
^That's true, and they're usually not that complicated to explain/introduce
A paper about fractals needs pretty pictures, though
 
vzn
7:59 PM
fractals are very deep, they have various undecidability aspects etc.
ah yes the (infamous) "pretty pictures" dismissal, going back to 1980s at least :\
 
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