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12:00 AM
@AlfredCentauri reference?
@alarge that doesn't mean much to me yet
 
@0celo7 Google my friend
@alarge That's not necessarily true; the codes I was working with and seeing on clusters were pure Fortran and were all made post-2005 (one as recent as 2013). So "old code base" isn't really a necessity when it came to Fortran. But Python wrappers are very nice b/c of Python's nice, easy syntax
 
12:16 AM
@AlfredCentauri ENTER
 
You are inside a building, a well house for a large spring.

There are some keys on the ground here.

There is tasty food here.

There is a shiny brass lamp nearby.

There is an empty bottle here.
 
I want the food
 
@AlfredCentauri Uh...take keys?
 
@ACuriousMind Taken.
 
@AlfredCentauri Take lamp
 
12:21 AM
@ACuriousMind Taken.
 
@AlfredCentauri Take bottle
 
@ACuriousMind Taken. :)
 
@AlfredCentauri Leave
Oh god, I hate these games, I'm probably not gonna figure out how to go down the gully :D
 
@ACuriousMind You'll have to say which compass direction to go in.
 
@AlfredCentauri go south
(assuming I looked north at the start :P)
 
12:27 AM
@ACuriousMind You are in a valley in the forest beside a stream tumbling along a rocky bed.
 
@AlfredCentauri go south
 
@ACuriousMind At your feet all the water of the stream splashes into a 2-inch slit in the rock. Downstream the streambed is bare rock.
 
Hm, 2 inch is too small to fit throught, right?
@AlfredCentauri go south
 
@ACuriousMind You are in a 20-foot depression floored with bare dirt. Set into the dirt is a strong steel grate mounted in concrete. A dry streambed leads into the depression.
 
Hmmm...perhaps I am Hulk
2
@AlfredCentauri force grate
 
12:33 AM
@ACuriousMind What do you want to force the steel grate with?
 
Damn
@AlfredCentauri hands
 
1:03 AM
@ACuriousMind (hmmm... what did you take the keys for?)
 
@KyleKanos Trump getting booed
 
Hooray
Boo the thug
 
lol Rand Paul is really a manlet
they're all very orange...
 
Probably your TV
 
you're streaming on your PC?
linux box?
better TV?
 
1:13 AM
Too many hours in the tanning salon
 
It is online
 
1:28 AM
@KyleKanos unborn children have 5th and 14th amendment rights?
 
1:53 AM
can anyone shed some light on it? why my question is put on hold? --> physics.stackexchange.com/questions/197952/…
 
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.
If this question can be reworded to fit the rules in the help center, please edit the question.
 
well, I am not sure what is unclear
it is quite obvious I am asking if there is more fundamental reasons for symmetry.
it is a question of either yes or no
 
Then ask that.
 
I did
in my second question
but it was put on hold
it is quite annoying, especially comparing with the excitement I had yesterday finding some basic assumption in relativity.
2
 
Generally "soft" questions are discouraged.
If you ask one it must be specific and clear.
This is true across all the sites :-)
Best to look for other soft questions to see what is acceptable
 
2:12 AM
sigh, thanks man.
 
I would take away one of those "bullets" and make it straight to the point.
Is there a fundamental reason for symmetry in nature?
 
bullets?
well, that's better than mine
 
• <----
 
2:40 AM
@ShingLau I think You are essentially asking how much of a role does symmetry play in the laws of nature and why. The answer to this could only be given by nature itself. That makes your question essentially "unanswerable."
 
@KyleKanos do they always throw around Reagan like this?
 
@0celo7 Yes
 
Better Regan than Nixon?
Let's not get into Kennedy :P
 
@skullpatrol kind of. but there may be fundamental reason for symmetry I don't know(since I am just undergrad now), then this can be answered. but if there is no fundamental reason, then we will have to take it as fundamental assumption. "Taking it as fundamental assumption." personally, I can accept this kind of pragmatic reason as answer.
 
Therefore you have answered it for yourself :-)
 
2:46 AM
@KyleKanos where is Chris Christie going to get the money to do all that with the military
 
@0celo7 We'll never find out ;)
 
@KyleKanos good point lol
 
so I take it: so far we don't know the fundamental reason for symmetry if there is one? @skullpatrol
 
Correct.
 
@skullpatrol thanks man.
 
2:48 AM
Thanks for asking :-)
 
why are they dragging God into this
 
Easy target
He's everywhere :P
 
What a surprise, the casino thug is winning.
$ talks
 
what the fuck is this headline video.foxnews.com/v/4404595126001/…
 
2:59 AM
Fox News knows to get the top ratings you gotta be controversial
Again $ talks & give us dirty laundry.
 
oh shit Huckabee for the kill
 
3:20 AM
@0celo7 Where & when was the poll taken?
Interesting....WWE is hiring a data scientist: linkedin.com/jobs2/view/66767138
 
@KyleKanos not sure
I tried to find it again but got nada
don't take it seriously
 
3:40 AM
@KyleKanos apparently there's a fox news poll out there but 4chan raided it so it means fuck all
 
@0celo7 Wonder if they do that for Dem polls?
Also, did they raid it for Trump?
 
@KyleKanos you know it
@KyleKanos perhaps, but I don't know which way they'd vote
done with this god-forsaken essay
 
3:56 AM
How many pages?
 
4
it wasn't hard, I just 1,000% didn't want to do it
 
That makes it 10,000% harder :P
An exponential^ increase in percentage :D
You don't see that too often.
 
 
4 hours later…
8:22 AM
hello
 
 
2 hours later…
9:55 AM
argh I'm seeing the EM drive show up on facebook now!
Also god damnit America you better not elect Donald Trump as your president. You have no idea how much us Europeans despise him :P
 
you'd better get used to it
The EM drive never dies
The first paper for the EM drive is from like the 50's
It stems from a controversy that started in 1908
 
It's so dumb.
 
Huy
10:11 AM
@Danu: What's EM?
Electromagnetism?
 
 
2 hours later…
12:25 PM
@0celo7: Please tell me you didn't really think that I don't know how to invert a metric.
 
Obviously you do 1/metric
Elementary!
 
@ShingLau I just don't know what it means to ask for the reason for symmetries. That's like asking why the world obeys physical laws, to me - it's the way it is, and they were designed to match the physical world. There's no way for us to tell why the world obeys the physical laws, or, at least, that's not a physics question.
 
12:46 PM
"A male observer follows a timelike worldline (γ) in spacetime (because he must have a proper time). He has a frame for himself."
Why a male observer
 
@Slereah My guess is political correctness so that OP can use the pronoun "he" in the rest of the post w/o worrying of offending anyone
 
@ACuriousMind :)
that's what you get for asking me if I know what a taylor series is
@KyleKanos what
 
@0celo7 This post. OP says, A male observer...; that is what Slereah was questioning & I responding to
 
@ACuriousMind that functional integral books looks interesting but scary
 
@0celo7 That's ages ago, isn't it? You're vengeful
@0celo7 Glimm/Jaffe? It's the most technical thing ever, but yeah, I'd not call it uninteresting.
 
1:01 PM
@ACuriousMind do I need to take some real functional analysis to read it? probably
@ACuriousMind beware
 
@0celo7 I guess so, I didn't know (and still don't know the right) functional analysis to understand much of it
 
@ACuriousMind I just noticed there's a "geometry of groups" class...
 
@Zach466920 up and down quarks are both the same thing (quarks) with different properties (upness and downness). Dark energy and dark matter are two different things with a similar property - "darkness," meaning we can't see them. Sharing a word between two names for two objects doesn't mean much about the nature of the conceptual objects; otherwise we'd be trying to explain how dark chocolate is just the dark matter version of chocolate, since those also are both called "dark." — Asher 5 hours ago
Dark matter chocolate now sounds delicious
 
@ACuriousMind what can you gather from that?
I wouldn't take that until my last year btw
 
@0celo7 I want this functional analysis course and not the Sobolev crap I had!
 
1:07 PM
:D
It's a PhD level class...probably going to kill me
 
"Gelfand-Naimark and spectral theory of normal operators" is "quantum physics", essentially :D
I want this.
 
oh fuck it's a heresy class?
 
@0celo7 Not purely, Lax(-Milgram), for instance, one uses to prove the existence of solutions to von Neumann and Dirichlet problems, that's more like...every differential equation in physics ever.
 
very descriptive description
 
user54412
@Danu I'm curious why you approved this. The proof doesn't really add much (it was the result the OP wanted), and what's worse is that the math now overflows the answer.
 
user54412
1:10 PM
(Note that I've rarely seen a suggested edit that I liked -- in fact pretty much all suggested edits to my own posts I've reverted. So I might be an outlier here.)
 
@ACuriousMind The prereq for that functional analysis class is i.gyazo.com/f1cc02cc2d1f320cfc624f61e2dd880b.png and the coreq is i.gyazo.com/6185d83287c553717e2e29aaf0dab1e7.png
 
user54412
@Danu Unfortunately, in the US we don't have a choice to vote "no" in elections. The greatest mistake the founders of this country made was thinking a bad elected official would be better than none at all.
 
@0celo7 Looks fine to me
@ChrisWhite I don't think you can vote "no" in an election anywhere
 
You can, however, do a write-in and vote for Mickey Mouse
 
user54412
@ACuriousMind I admit I can't think of a place. But what about those countries where voting is compulsory?
 
1:18 PM
Sorry Kyle, I only vote for the California raisins
 
Equally valid vote
 
@ChrisWhite I think you then just invalidate your ballot if you want to abstain by placing the marks wrong.
 
you should always vote for Vermin Supreme
 
Intentionally having "hanging chads"
 
1:29 PM
@0celo7 have you considered showing the school your stack account to place out of Physics 1 lol?
 
@ta3920 "no exceptions"
 
@0celo7 that's terrible. Did you try speaking with department head?
 
@ta3920 he said the class has a programming component
which I don't have
 
@0celo7 which class was that specifically?
 
1:55 PM
@ta3920 don't know
 
2:07 PM
hmm, the book box can be lifted now but it's too heavy to carry
 
2:26 PM
@0celo7 ...why not make two boxes?
 
@ACuriousMind brilliant
 
Or get a hand cart?
 
this may be retarded, but that online course left me with a question...why if both the man and the woman are drunk, why is the man on the hook for rape? the man can't consent either...
and if you're drunk enough to not give consent, why can you reliably recount the events of the night
 
@ChrisWhite Overflows?
It's a correct derivation of the result. What's the problem?
@ChrisWhite One can vote blank (which I seriously consider doing)
@0celo7 Depends on who initiated the sex, I guess.
Also obviously preconceived notions of masculine bestiality, of course.
 
@Danu but if both parties were drunk, who can say that for a fact? cf. this
 
2:38 PM
See my second comment, then
Could you imagine that? You both get drunk, you have sex (and both parties seem to be into it) and then the next day you get charged with rape.
Very happy to say that that seems pretty much impossible here
 
what I don't get is this: they stress you are responsible for your actions when drunk, but women can't give consent while drunk
please explain
 
Have you considered it is unexplainable and is simply irrational ?
 
It is Societal Standards
Within the realm of sociology
 
Men are just viewed as prone to "predatory behavior" a lot of times.
 
@KyleKanos of course
 
2:56 PM
@Danu The rendered math goes outside of the text box. That's "overflowing the box".
 
@ACuriousMind I can't see that when reviewing, can I?
Also, out of what text box?
Oh... that!
Huh, I am quite certain (95%+) that it didn't look like that when I reviewed it...
 
@Danu Just...look at it! :D
 
I read some of the math...
 
Doesn't overflow for me, though I've got Widescreen Mode Enabled
 
obe
@0celo7 How do you define time in GR?
 
3:01 PM
"that coordinate with a different sign" :D
 
Huy
@Danu: @0celo7: Did you read about the 19 year old guy who had sex with a 14 year old girl who lied about her age and admitted to it in court?
 
obe
@Danu yeah that's what I thought.
 
@obe You can't, for arbitrary spacetimes.
 
@Huy Did not read
@ACuriousMind My definition works! And it's better than it sounds
It's just not everywhere the same coordinate
but that's kind of the point
 
obe
@ACuriousMind @0celo7 Can you tell me why?
 
Huy
3:03 PM
@Danu: He got charged as a sex offender and banned from using the Internet, smartphones etc. because the judge said he was angry that he used the internet to meet a girl.
 
@Huy Wow, great...
 
Huy
"That seems to be part of our culture now," he said, according to a transcript. "Meet, have sex, hook up, sayonara. Totally inappropriate behavior. There is no excuse for this whatsoever,"
@Danu: I read weird stories happening in the US pretty much every day on reddit. That's not even including all the cop-drama.
No idea what's going on over there. ö.ö
 
And the judge got away with that?
 
Huy
@Danu: Apparently, the internet blew this story up so much the judge decided to go for a re-sentencing decision (I don't know what the new punishment is).
 
@Huy Well, that's something, at least.
 
3:05 PM
@obe Because you might have something like closed time-like curves ("time-travel"), and this makes it impossible to suitably slice the manifold into "instants of time"
 
Huy
@Danu: Yes, but still rather sad, imagine it wouldn't get to the news / internet and the kid didn't have any support from family, financially, then he would have no way to do anything about it at all. :(
 
formally, the manifold should be globally hyperbolic so we have a Cauchy surface.
 
Huy
@Danu: @0celo7: This here was pretty big on reddit a few weeks ago, not sure what the current state is: reason.com/blog/2015/07/20/…
 
@ACuriousMind aww you know the lingo!
so my DS emulator doesn't actually make save games
crazy
 
@0celo7 :)
 
obe
3:12 PM
@0celo7 shift + f1.
 
@ACuriousMind did you read Straumann while I wasn't looking
@obe that's a save state not a save game
 
@0celo7 Not yet. I think I might start this weekend.
 
@ACuriousMind these handheld emulators are more CPU demanding than modern HD video games
 
@0celo7 I know
 
@ACuriousMind do you have any plan for doing the exercises?
 
3:22 PM
@0celo7 Not yet
 
obe
@0celo7 What's the difference? The only difference is that save state can save at any moment, while save game can only save at certain points.
 
@obe you have to reset Pokemon games after you beat the elite four and load a proper in game save to continue playing
 
obe
I knew you would say that.
Though it should have that option to.
 
Why did you ask then
I tried saving again and it worked
 
I tried playing pokemon once... at about level 20 it got boring :P
 
3:31 PM
@Danu trash
 
Thrash?
 
Huy
Trash.
 
@Danu 0/10 trash
 
:D
 
user54412
Danu uses Thrash. It's not very effective.
 
3:35 PM
...but my Nidoking is so OP that it doesn't really matter and it's still a OHKO.
(I watched a lot of Pokemon speedruns)
 
user54412
Play Morrowind. — Junuxx 23 hours ago
 
It's a wonderful day in the neighborhood
 
user54412
^^ Good advice for @0celo7
 
user54412
(minor spoilers in that thread)
 
Huy
@danu: How can you enjoy watching speedruns if you don't enjoy playing it?
 
3:39 PM
@Huy asking the real questions
 
@ChrisWhite Good advice for anyone
 
@Huy You should try it. I do this exclusively!
(I don't actually game almost ever)
 
Huy
@Danu: I really can't enjoy watching any game (be it sports or e-sports) if I don't enjoy playing it myself.
 
You're missing out! :D
 
I don't enjoy watching other people play things at all
 
3:41 PM
Really?
 
user54412
Imagine someone who's a vegetarian for moral reasons going out of their way to watch people eat meat.
 
@Danu Really.
 
Not into twitch? very un-German of you!
 
Huy
@ACuriousMind: So you're not one of the four loyal subscribers of 0celo7's stream?
 
@Huy Nope
 
Huy
3:42 PM
@Danu: Twitch? Back in my days own3d.tv was the cool stuff!
 
@Danu Nope, I find watching people play utterly boring considering I could just play myself
 
user54412
The whole point of gaming -- its distinguishing characteristic from other forms of entertainment -- is interaction. Passively watching gaming is like... playing the audio track from a movie without the picture.
 
@ChrisWhite I like this simile better than the veggie one
 
Huy
@ChrisWhite: I do enjoy listening to OST of movies every now and then though.
 
@ChrisWhite Nawwww
I really like watching professionals play Starcraft, or chess for that matter
 
Huy
3:49 PM
@Danu: Almost the same thing!
 
@Huy There are some superficial similarities :P
 
Yep, both equally boring :D
 
@ACuriousMind Watching people do it, or playing it?
 
(the watching it, not the game itself)
 
Huy
@Danu: I was always too bad for SC2 so I decided to become a LoL pro.
 
3:54 PM
@Huy Are you serious? :P
 
Huy
@Danu: Dead serious.
 
user54412
@ACuriousMind It seems there are two types of people in the world. Those like us who know how to have fun. And those who watch us have fun.
 
@Huy You're trying to become a professional gamer?
@ChrisWhite ...and then use it to be better than you ;)
 
Huy
@Danu: I used to, but I stopped for my studies.
 
Ah, okay
 
user54412
3:57 PM
@Danu Except you won't, because you don't find it fun to play :P
 
Huy
@Danu: But yeah, with SC2 I saw little improvement and I was nowhere close to other professional players, in LoL that was very different. Even though some avid fans will always say that "LoL is hard to master".
 
@ChrisWhite I do, I just don't play video games: I feel kind of guilty about the time wasted after playing games, so I only do it during some holidays or something, once a year.
 
@ChrisWhite :)
 
@Huy Heh
 
user54412
I wonder if I can convince people to pay to watch me do physics professionally...
 
3:58 PM
@Danu Time enjoyed is not time wasted.
 
@ACuriousMind But I also enjoy studying.
 
@ChrisWhite lol
@Danu So? One can perfectly do both
 
@ACuriousMind Not at the same time :P
So I could've studied, or played chess (which I also view as more productive/useful/"worthwhile")
 
@Danu Obviously not :D
 
user54412
@Danu Have you not seen 0celo7's stream?
 
4:00 PM
@ChrisWhite Well, I try to do it, even when I game :P
 
Huy
@Danu: Do you play chess professionally? I know quite a few.
 
@Huy Noooo, not professionally. I'm terrible.
My rating would be like ~1700 haha
 
Huy
Ah, ok. One of my high school students plays professionally. He always likes to ask me if I want to play against him. :D
 
How old is he? And what's his rating?
 
Huy
 
4:03 PM
@Huy professionally?
 
Huy
@Danu: I don't know, that's what his other teachers told me.
 
No offense, but his rating is not even nearly enough for a title
 
Huy
@Danu: I'm also sure Switzerland isn't very good chess-wise, compared to Germany. :P
 
He's not a professional :P He's like... not a million times better than me.
Not even a high-rated amateur. That starts at around 2100-2300
You need at least 2500+ to be a pro
(and actually live off of it)
And you probably need 2000 by age 15 or so to have any serious chances nowadays. The best guys are 2500+ by 12!
 
Huy
@Danu: A friend of mine was 2133 before she started studying maths with me. Do you know whether women's ratings are comparable to men's?
 
4:07 PM
@Huy They have their own ratings, but the ratings still tend to be a bit lower... like 2600 and stuff
 
Huy
Wow, 2500 by 12. That is almost as hard to imagine as the top answer from MO the other day.
 
2133 is pretty good: Probably a strong amateur.
@Huy Carlsen was a grandmaster by 13, I think
There are now even 12 year old grandmasters, if I'm not mistaken.
 
Huy
Not bad.
I learned how to use images in HTML at age 10, so I'm also pretty impressive.
 
I was off by 2 years in my estimates
@Huy Lol!
 
Huy
:D
@Danu: So what's your LoL rating? :D
Or what would it be?
 
4:16 PM
@ChrisWhite I have it right here, one click away...but it's so damn slow
@ChrisWhite what does my stream have to do with that
"physics lesson"?
@obe direction of increase of entropy...maybe
 
4:37 PM
@Huy No idea!
I never really watched LoL too much: It's just not interesting to me
 
Huy
It would have been if you had watched ME!
I'm very entertaining. I don't talk at all and just play the game.
 
I got my Hawking book and my Straumann book
woo
although so it turns out the Hawking book is a paper compilation
 
@ACuriousMind This question just showed up on the front page.
I read the comments and saw yours with the six upvotes.
 
@0celo7 do you actually stream, or was that a joke?
 
I thought to myself "Oh come on, that's not true and not helpful", so I started writing a comment objecting to yours.
Then I noticed I had already done that. >.<
 
4:44 PM
@DanielSank Heh, at least you are consistent with your self from a month ago ;)
 
@ACuriousMind My thoughts exactly.
 
@ta3920 at times
@Danu get ready
 
5:16 PM
So I am perusing Straumann
It seems to be mostly common topics :p
The usual GR fare!
black holes, FRW, gravitational waves!
though it does seem to be in more details
 
It has more mathematics in the appendices, I think
 
It has more appendices than chapters
 
5:35 PM
@Slereah I never said it wasn't standard
He does derive the Kerr solution in detail though, that's not standard
 
Did u know that the Kerr solution isn't the general solution for a vacuum static axisymmetric spacetime
that would be the Tomimatsu metric
 
obe
6:18 PM
@0celo7 That doesn't sound like something you would say.
 
@obe what?
 
obe
@0celo7 Idk.
 
there is actually a GR definition of time as entropy increase
Although mostly used for quantum gravity
Thermodynamical time
 
obe
Yeah though he didn't define it mathematically.
> That doesn't sound like something you would say.
 
why doesn't that sound like something I'd say
 
obe
6:29 PM
Normally you would provide more detail.
 
playing Skyrim, ain't nobody got time for details
 
obe
;<
 
cf. HE sect 6.1
I think
pulled that out of my ass, may or may not be right
 
It's the section on time orientability
 
yeah I think it's there
 
6:33 PM
very roughly
 
user54412
6:49 PM
Ok -- space question here. While reading this I hear the same tired story about how meteorites from everything land everywhere in the solar system.
 
user54412
Physically, how plausible is this?
 
user54412
Like, how does an impacting meteor launch a rock at escape velocity without destroying the rock?
 
user54412
Especially launching rocks up from Earth, through the atmosphere.
 
@ChrisWhite survival of the strongest rocks
 
7:29 PM
@ChrisWhite Watching people code is already a thing. As for physics, I'd watch @DanielSank building one of his machines and explaining what goes into it.
 
7:53 PM
@alarge Would you actually pay money for that? Suppose you go to a website called "Quantum Computing in Action!" and get hit with a subscription page asking for your credit card. Would you enter it?
(real question, not rhetorical)
 
@DanielSank Depends on the type and quality of the content, and the price. I buy textbooks and pay for Netflix and have funded some tinkering projects on Kickstarter, so.. maybe? I was considering buying a season of destroyallsoftware.com as well.
 
@DanielSank While I enjoy listening/watching to speed runs of video games, I don't know that I've actually considered seriously donating money to watch them.
As far as I can tell, there really isn't any actual benefit to "subscribing" to someone on twitch ($5/month, from what it seems)
At most, you get access to "channel emotes" which often are kinda lame anyway.
But you get the same email alert saying "so-and-so is streaming Game X now!" whether you're subscribed or merely "following"
 
8:42 PM
hello all!
anybody there
I have a question.. Now, I am trying to solve a Lindblad Equation.. However, the Hamiltonian is in cm^-1 and one of the constants in the equation is also in cm^-1
Why?
Shouldnt it be in units of energy? and the constant should be in units of ns^-1
 
@alarge I bet destroyallsoftware is worth it.
@KyleKanos Heh, yeah.
 
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