« first day (3180 days earlier)      last day (1732 days later) » 

ZeroTheHero
ZeroTheHero
1:38 AM
Feigenbaum passed away. I often ask students in my class mech course to write a code and estimate the constant that bears his name...
 
 
8 hours later…
skullpetrol
skullpetrol
9:44 AM
Congrats @JohnRennie on the thrilling worldcup victory.
They're calling it greatest game ever played in one day.
 
John Rennie
John Rennie
@skullpetrol I must admit that I didn't watch it. I'm not a huge fan of cricket. I was more interested in Lewis Hamilton's win at the British Grand Prix.
I read the reports of the match, and yes it was the closest finish ever in the World Cup.
 
skullpetrol
skullpetrol
The next World Cup in India will have its work cut out to beat that record in 2023.
I hope this year's World Cup of rugby will be as exciting.
The All Blacks should make it to the finals also.
 
Slereah
Slereah
10:16 AM
I'm trying to solve the free particle system in every possible formalism I can think of
there is quite a lot of them
 
 
2 hours later…
bolbteppa
bolbteppa
12:33 PM
Classical non-rel: Lagrangian, Hamiltonian, Hamilton-Jacobi.

Classical rel: same. Also whole theory of free EM Fields and free GR fields e.g. Schwarzschild.

Quantum non-rel: Schrodinger, Heisenberg, BRST.

Quantum rel: KG equation, Dirac equation, there is one for every spin above this.... Also free KG field, free Dirac field, free EM field, etc...
Missing things?
 
ACuriousMind
ACuriousMind
In order to tell what you're missing you'd have to tell us what you're trying to do :P
 
skillpatrol
skillpatrol
or perhaps, what you're aiming for?
 
bolbteppa
bolbteppa
Path integral
 
Slereah
Slereah
1:12 PM
@bolbteppa Basically you can apply a whole bunch of actions, quantization methods, constrain methods and such
Even the classical one has a dumbass constrained action
$$S = \int d\tau \frac{m}{2} \frac{\dot{x}^2}{\dot{t}}$$
 
Slereah
Slereah
1:27 PM
I'd like to make like a whole bunch of basic physics problems written in a whole bunch of formalisms
Like simple stuff like free particles, elastic collisions, two body problems, etc etc
 
Novalium Company
Novalium Company
2:25 PM
Pff, I'm still a bit scared math will limit my creativity and out of the box thinking ability. Please prove me wrong.
 
Slereah
Slereah
You're 100% correct
never do math
 
Novalium Company
Novalium Company
wut why?
I mean, am I really correct?
@Slereah sarcasm?
 
ACuriousMind
ACuriousMind
@NovaliumCompany Why would math "limit your creativity"? It would only limit you if e.g. you started insisting that everything else also has to follow mathematical standards of rigor, but that's entirely up to you.
 
PM 2Ring
PM 2Ring
2:46 PM
@NovaliumCompany Did you read that quote from Feynman about the beauty of a flower, that I linked for you the other day?
 
Ryan Unger
Ryan Unger
@ACuriousMind 🤨
 
alarge
alarge
@NovaliumCompany Math is a creative subject. Would you be afraid that reading poetry somehow limited your creativity and out of the box thinking ability?
 
ACuriousMind
ACuriousMind
@RyanUnger Not available in my font, I only see a unicode box :P
 
Ryan Unger
Ryan Unger
 
Novalium Company
Novalium Company
@PM2Ring Did it now yes
I'll just start learning math and hope it doesn't rig my mind in any way that doesn't favor my entreprenourial goals
 
ACuriousMind
ACuriousMind
2:57 PM
@RyanUnger Ah, what a wonderful world we live in where "Emojipedia" is a thing
 
skillpatrol
skillpatrol
why wouldn't it be a thing? :P
 
PM 2Ring
PM 2Ring
@NovaliumCompany Oh, good. Yesterday, Loong mentioned that it was the birthday of the astrophysicist Dr Brian May. He has obviously studied mathematics. It doesn't appear to have stunted his creativity. Eg, his guitar solo in Bohemian Rhapsody is widely considered to be one of the epic guitar solos in rock music.
 
Novalium Company
Novalium Company
Oh, ok. But would it limit my entreprenourial thinking in any way?
 
bolbteppa
bolbteppa
It took what nearly 2000 years to progress beyond Euclidean geometry to even Cartesian geometry, and then about centuries to get from Calculus to complex analysis etc, the idea math doesn't involve creativity lol
 
ACuriousMind
ACuriousMind
I have no idea what "entreprenourial thinking" is (and I'm not referring to the spelling mistake :P)
 
Loong
Loong
3:06 PM
@ACuriousMind apparently an excuse for not doing your math homework
 
bolbteppa
bolbteppa
It's not like Bill Gates studied math at Harvard or anything
7
 
PM 2Ring
PM 2Ring
@NovaliumCompany Maybe. Entrepreneurs are gamblers, and people with mathematical training tend to avoid gambling on things that aren't a sure bet. ;)
 
bolbteppa
bolbteppa
@Slereah take them from L&L where they have them to get it as unified as possible
 
Slereah
Slereah
@bolbteppa get what?
 
skillpatrol
skillpatrol
@ACuriousMind it gets better with beachapedia :-)
 
bolbteppa
bolbteppa
3:10 PM
The problems, e.g. they do the same non-relativistic problem relativistically in another book e.g. collisions
 
Novalium Company
Novalium Company
Alright then. The Bill Gates example convinced me. Also Elon Musk has a physics degree sooo
 
skillpatrol
skillpatrol
math has a lot of business applications
 
Loong
Loong
 
Novalium Company
Novalium Company
Steve Jobs on the other hand was not a math person. I guess math doesn't make a big difference whether you will succeed as an entrepreneur or not
 
skillpatrol
skillpatrol
entrepreneur
Noun: entrepreneur (plural entrepreneurs)
  1. A person who organizes and operates a business venture and assumes much of the associated risk.
  2. A person who organizes a risky activity of any kind and acts substantially in the manner of a business entrepreneur.
  3. A person who strives for success and takes on risk by starting his own venture, service etc.
  4. entrepreneur m (plural entrepreneurs, feminine entrepreneuse)
  5. entrepreneur (person who organizes and operates a business venture)
 
Novalium Company
Novalium Company
3:17 PM
I see the word risk in every sentence :p
 
skillpatrol
skillpatrol
yup
 
Novalium Company
Novalium Company
It's not all about risk though
 
skillpatrol
skillpatrol
what is it all about?
 
Novalium Company
Novalium Company
Many things. Good ideas, where to apply them. You can't just think of a shitty idea, put all your savings into it and call that entrepreneurship
 
skillpatrol
skillpatrol
I see the word idea a lot :p
 
Novalium Company
Novalium Company
3:21 PM
I'm looking to stimulate my mind in different ways. Math certainly does the job so I'll spend some time exploring it. What's the worst thing that can happen.
 
Emilio Pisanty
Emilio Pisanty
0
Q: I am a pervert please somebody kill me

user5361IAmA pervert........... Somebody kill me u/Deepocd123 Hi guys today i am gonna make a confession. I know everybody's going to abuse me. And it is indeed right. Even i deserve to get punished for this horrendous crime. Today i harassed a girl i forgot about all my morals and did this immoral wor...

abnormal-psychology
That's..... interesting
 
Novalium Company
Novalium Company
what the f*ck
 
skillpatrol
skillpatrol
that's...off-topic?
 
Novalium Company
Novalium Company
that's....lit
 
ACuriousMind
ACuriousMind
@EmilioPisanty have you flagged that already?
 
skillpatrol
skillpatrol
3:28 PM
 
ACuriousMind
ACuriousMind
(also, are you taking an interest in psychology lately or how did you stumble across that?)
 
Novalium Company
Novalium Company
@ACuriousMind exactly my thought
 
Slereah
Slereah
@skillpatrol what's the appropriate stack exchange for this
Interpersonal skills?
 
skillpatrol
skillpatrol
applied neuroscience at its finest
 
Novalium Company
Novalium Company
@skillpatrol yay, neuroscience
 
vzn
vzn
3:37 PM
lol about the idea of math study hurting somebodies brain. however bolbteppa didnt give more of the story. gates is a harvard dropout. jobs is also a college dropout. and this is not uncommon. there are many billionaires who didnt go to college or dropped out. another big example, larry ellison of oracle. thiel, a colorful character/ billionaire even advocates directly against it. newsweek.com/2017/03/03/…
 
Novalium Company
Novalium Company
 
ACuriousMind
ACuriousMind
And then there's Jim Simons who is both an accomplished mathematician and worth billions. You can find examples for every kind of story you want to tell about the relation between formal education and success.
2
 
vzn
vzn
have cited simons here myself, am a big admirer, think hes nearly the worlds most successful quant. actually quantitative finance, a relatively new science, is an example of many Phds getting very, very rich based on very advanced math + science. but anyway think theres a very nuanced/ multidimensional (not 1-dimensional) aspect to the question of the times/ ages, "should I go to college"
 
ACuriousMind
ACuriousMind
Although I would caution in general against the idea that people are worth emulating because they are rich.
 
Novalium Company
Novalium Company
I'm learning maths, I've decided. Thanks everyone. Btw differential calculus is pretty interesting actually
 
vzn
vzn
3:42 PM
yes, there are very many unethical + nearly detestable rich people (1 in particular is inundating the headlines lately) and there are new psychological studies that actually measure a decrease in empathy among the rich, just saw an interesting one cited recently...
 
Novalium Company
Novalium Company
I'm still emotionally hurt that Tony Stark died :(((
lol that was so random xD
 
vzn
vzn
rats cant find that reddit psychological study re wealth cited recently but heres something else googled that is a bit eyepopping
 
Novalium Company
Novalium Company
Elon Musk is connecting brains to smartphones. Hacker's midnight fantasies coming true
 
vzn
vzn
 
bolbteppa
bolbteppa
(The point was BG took the famously hardest first year math class at Harvard and it didn't somehow magically stifle his entrepreneurial creativity)
 
vzn
vzn
3:56 PM
BG + other billionaires are singular individuals and they have both lessons to emulate and also regard as unrepeatable paths. BGs life is closely aligned with moores law revolution same with Jobs and (singulatarians notwithstanding) moores law is starting to fade, and is likely unrepeatable, a singular trend in history.
jack ma is a newly minted (chinese) billionaire, interesting case study. he got a BA in english. he advocates strongly for educational opportunity, making recent headlines on subj. alizila.com/jack-ma-rural-education-integral-to-chinas-future
 
skullpetrol
skullpetrol
4:21 PM
There's a huge difference between third world billionaires and western billionaires.
The top 5 billionaires in India have more money than half the entire countries' population.
 
ACuriousMind
ACuriousMind
@skullpetrol For the US, it's just the top 3. Where the "huge difference"?
 
Ryan Unger
Ryan Unger
@ACuriousMind U.S. Billionaires are good and honest people.
 
skullpetrol
skullpetrol
> About 60% of India's nearly 1.3 billion people live on less than $3.10 a day
@ACuriousMind^
 
vzn
vzn
4:38 PM
@RyanUnger lol capitalism as a religion/ belief system? said to a work colleague recently: capitalism doesnt scale well...
 
ACuriousMind
ACuriousMind
@skullpetrol If you want to make an actual argument based on that quote, go ahead.
 
Ryan Unger
Ryan Unger
@vzn I pray every day to the gods of capitalism
 
vzn
vzn
@RyanUnger lol maybe some of those gods are evil :P
 
Ryan Unger
Ryan Unger
you must have the wrong definition of evil
 
Gyromagnetic
Gyromagnetic
sup hbärs
 
vzn
vzn
4:43 PM
lol all hail the GDP :P
 
ACuriousMind
ACuriousMind
@Gyromagnetic reckless worship of late stage capitalism, apparently.
 
Ryan Unger
Ryan Unger
I think I'm pretty reckfull, ACM
 
vzn
vzn
@RyanUnger what has capitalism done for you anyway? wondering whats your student debt...) o_O
 
Gyromagnetic
Gyromagnetic
@ACuriousMind happens hahaha. Capitalism + democracy is basically soft communism.
distributism + monarchy are the true gods
 
ACuriousMind
ACuriousMind
@RyanUnger that word hurts my brain
 
skullpetrol
skullpetrol
4:51 PM
reckful
Adjective: reckful (comparative more reckful, superlative most reckful)
  1. (uncommon) Full of careful heed or attention; careful; cautious.
  2. Synonyms: attentive, audient, heedful1845, Allan Freer, The North British review:
  3. Man, in fact, should be reckless in nothing, but reckful in every thing; […]
  4. 1994, InfoWorld - Oct 24:
  5. […] it's tough to call when it's in that gray area between reckless stupidity and reckful insanity.
 
Ryan Unger
Ryan Unger
@ACuriousMind Don't you mean CPU
 
PM 2Ring
PM 2Ring
Reckful is a perfectly cromulent word.
 
Ryan Unger
Ryan Unger
apparently it only has one l
hmm
why though
why does careful only have on l
shouldn't it be carefull
you're full of care
 
ACuriousMind
ACuriousMind
@RyanUnger Maybe I'm highly parallelizable and run on GPUs
 
PM 2Ring
PM 2Ring
But I agree that we ought to be mindful of the ESL people here, like ACM and vzn.
 
vzn
vzn
4:55 PM
← again notices how weird english is, reckful + wreckful both real words o_O
 
Emilio Pisanty
Emilio Pisanty
@ACuriousMind a friend went from physics to neuroscience and I was curious about whether there was an SE for that
 
vzn
vzn
@PM2Ring that is a wild unsubstantiated rumor in my case.
 
Emilio Pisanty
Emilio Pisanty
That question was top of the front page
 
ACuriousMind
ACuriousMind
ah, bummer
 
Emilio Pisanty
Emilio Pisanty
Did a conclusive job of answering my question with a firm "yes, but"
 
skullpetrol
skullpetrol
5:00 PM
The good news is that question is gone.
 
PM 2Ring
PM 2Ring
@vzn There's plenty of evidence in the transcripts of this room...
 
vzn
vzn
@PM2Ring think its strange what you regard as "evidence" + think theres strong case against it. have you read my blog at all? + not sure why you think its important. can neither confirm nor denyâ„¢ :P
 
Ryan Unger
Ryan Unger
lmaooooo
always suspected vzn is a spy
 
vzn
vzn
oh no o_O
 
Emilio Pisanty
Emilio Pisanty
@skullpetrol it's a good thing the oneboxer caught just enough to show how awful the question was while keeping it chat-transcript-safe
 
Ryan Unger
Ryan Unger
5:03 PM
@EmilioPisanty it got worse than that?
 
skullpetrol
skullpetrol
:-)
 
Emilio Pisanty
Emilio Pisanty
@RyanUnger yes
Very
 
Ryan Unger
Ryan Unger
lol
interesting
 
skullpetrol
skullpetrol
 
Emilio Pisanty
Emilio Pisanty
-1
Q: Heisenburg Uncertainty applied to a real vacuum

Ted BoothI was wondering if the reason when you have a candle in a vacuum chamber, and you remove the air, the candle goes out, but is it because the candle's flame is in a definite position inside the chamber. You know the edge of the vacuum, so I'm wondering if you could apply a sonic vibration with a ...

combustion
Oooof
Does that make off-topic?
 
PM 2Ring
PM 2Ring
5:05 PM
@vzn That's ok. I'm happy to make allowances for non-native speakers of English. You don't have to tell me what your mother tongue is if you don't want to.
 
Emilio Pisanty
Emilio Pisanty
Or is it just bad?
 
PM 2Ring
PM 2Ring
@EmilioPisanty I don't think the OP is trying to ask something non-mainstream. They just have some weird misconceptions about quantum stuff.
 
ACuriousMind
ACuriousMind
@EmilioPisanty unclear what you're asking, imo. I've read it twice now and I still have no idea what it's trying to ask
 
skullpetrol
skullpetrol
@Loong good cartoon :-)
 
vzn
vzn
 
skullpetrol
skullpetrol
5:09 PM
Making the data fit^
 
PM 2Ring
PM 2Ring
@EmilioPisanty He just edited it. It's worse now. :) I'm still not sure if we can close it as non-mainstream, but I guess Not Clear works.
 
Loong
Loong
@PM2Ring Maybe you should wait a few more edits before closing it. ;-) That candle in a vacuum example is solving more and more problems.
Faraday would be proud.
 
Ryan Unger
Ryan Unger
ok it's clearly a troll now, right
 
skullpetrol
skullpetrol
say away from trolls
 
PM 2Ring
PM 2Ring
@Loong Good point. I wonder if it's a spherical candle...
 
Loong
Loong
5:23 PM
 
vzn
vzn
@JMac btw have looked into this over the years and think theres more to it than meets the eye, have mentioned it a few times in this room over the years, but it requires careful/ timeconsuming analysis. someone with engr bkg may be able to appreciate it more...
 
PM 2Ring
PM 2Ring
@vzn I suppose it's possible that you are a native speaker of English, but that either you aren't very good at writing it, or your poor writing style is due to laziness. Or for some odd reason you think it's cool to reduce the comprehensibility of what you write...
 
Ryan Unger
Ryan Unger
lœl
 
PM 2Ring
PM 2Ring
 
vzn
vzn
5:39 PM
PM2Ring why dont you take your baseless criticisms elsewhere. its not nice
 
PM 2Ring
PM 2Ring
@vzn If you don't want to answer me, that's your prerogative. But if you don't explain yourself, then all I can do is speculate.
@Loong Mere closure doesn't faze this guy, he's made several more edits since it was put on hold. It now looks like he thinks he may have an explanation for dark energy.
 
Loong
Loong
@PM2Ring Yes, I saw that.
 
PM 2Ring
PM 2Ring
Mind you, I'm not averse to cellular automata being used to model physical stuff.
 
Loong
Loong
Looks like he has a few deleted questions like that.
> I think a black hole has a vortex inside that sucks in space like a tornado. However, I also think space is being blown as a bundle of straight lines as well into the tip of the tornado (blowing itself is not vortexed).
 
PM 2Ring
PM 2Ring
5:56 PM
I have to admire his imagination...
 
Ryan Unger
Ryan Unger
6:39 PM
@ACuriousMind what rule did Ted Booth violate?
 
ACuriousMind
ACuriousMind
@RyanUnger You know I won't answer that
 
 
1 hour later…
Slereah
Slereah
7:43 PM
@Loong ah, the line bundle
 
 
2 hours later…
bolbteppa
bolbteppa
9:15 PM
EM is the theory of a connection $\Gamma = A$, GR is the theory of the metric $g$ whose derivatives then create a connection $\Gamma = g^{-1} (\partial g + ...)$, what consequences does this have
 
Novalium Company
Novalium Company
9:41 PM
Am I doing this right: Integral of v(t) is derivative of x(t). Second integral of a(t) is derivative of x(t). Second integral of v(t) is second derivative of x(t). Am I getting it right?
 
bolbteppa
bolbteppa
No
 
Novalium Company
Novalium Company
:(
what's wrong?
 
bolbteppa
bolbteppa
Watch the Mechanical Universe they explain everything (in the universe)
The Mechanical Universe
The Mechanical Universe... And Beyond is a 52-part telecourse, filmed at the California Institute of Technology, that introduces university level physics, covering topics from Copernicus to quantum mechanics. The series was produced by Caltech and INTELECOM, a nonprofit consortium of California community colleges now known as Intelecom Learning, with financial support from Annenberg/CPB. == Overview == Produced starting in 1982, the videos make heavy use of historical dramatizations and visual aids to explain physics concepts. The latter were state of the art at the time, incorporating almost 8...
The integral of $v(t)$ is $x(t)$, $v(t)$ is the derivative of $x(t)$, the second integral of $a(t)$ is $x(t)$, second integral of $v(t)$ is nothing anybody cares about. $a(t)$ is the second derivative of $x(t)$.
 
Jake Rose
Jake Rose
@NovaliumCompany it’s easier to think in terms of the derivatives, then remember integration reverses differentiation
the rate of change of distance (speed) is obviously the derivative of distance etc
 
Novalium Company
Novalium Company
10:00 PM
@bolbteppa Just watched that an it helped so much. Everything is clear!
@JakeRose Yep, got that. I'm just trying to make some sense of integrals
I might watch the whole mechanical universe thing. I hope they have integrals too.
Whatever, 1PM, time for bed
 
bolbteppa
bolbteppa
 
Novalium Company
Novalium Company
lol
 

« first day (3180 days earlier)      last day (1732 days later) »