The h Bar

4:00 PM

Pretty much anything from Songs of Experience is fire

@JohnRennie , do you know of any context where the einstein action or lagrangian density need to be computed by a recursive numerical scheme?

user228700

Oh, I wish that I too had read this at school. No, no, absolutely not. Even in 12th, we read fairly simple poems so that now, I am unable to understand some of the more contrived poems there are-which is, really, to say most of them.

John Rennie

@Secret No

Secret

ok nvm then

user228700

Whenever there was possibility for more, they gave us a version that was heavily abridged and impossible to understand without the context of the rest of the whole poem.

John Rennie

4:05 PM

@Kaumudi.H there is a danger that poetry can become a sort of unusually hard crossword puzzle. Reading poetry and admiring it for the beauty of the language and the emotions it stirs seems to me an excellent use of the reader and the poet's time.

But constructing your poem from allusions so obscure that generations of academics argue about them seems rather arrogant and pointless.

Balarka Sen

@JohnRennie That's the point though

being a pretentious asshat

I like it

John Rennie

Not that I have any particular poet in mind though (cough - Eliot - cough :-)

Secret

s3-us-west-1.amazonaws.com/emogifs/map.html

There are 26 known categories of emotions

Balarka Sen

Eliot is nothing compared to the allusionary writings of James Joyce

Joyce is fricking fire

John Rennie

Possibly, but Joyce's language is just such fun. Even when you have absolutely no idea what it means :-)

Balarka Sen

4:08 PM

true

user228700

@JohnRennie Hmm. I can understand why it might seem pointless, of course, but I don't think that it is arrogant at all. I don't believe in the idea of being pretentious for the sake of being it. While it is true that authorial intent is overrated and that we are all free to make what we do out of every piece of art that we encounter, I do like having discussions to demystify pieces of art in an attempt to understand what the creator was attempting to convey. To me, it's a fun activity to do :-)

Balarka Sen

well sometimes authors are openly pretentious for the sake of it

James Joyce was

(again, I don't dislike that)

he literally gave literary critiques ze fingers and wrote an inscrutable novel which has now become a classic and a masterpiece

user228700

I don't understand it, the idea of being pretentious just for the sake of it.

John Rennie

@Kaumudi.H well, people like crossword puzzles ...

@Kaumudi.H I think Joyce found the reactions to his work amusing.

Balarka Sen

@Kaumudi It's called trolling people

user228700

4:12 PM

:-P

Balarka Sen

a very delightful and satisfying action

user228700

Well, the idea of trolling has never appealed to me either, because of which I fail to understand it.

Semiclassical

Joyce's work has the advantage, as a comedian would put it, of 'punching up'

0ßelö7

Have you even tried it @Kaumudi.H?

Balarka Sen

speaketh the expert BALEETED

Semiclassical

4:13 PM

in that the people who are most apt to be trolled by it were people who considered themselves very sophisticated in literature

user228700

@0ßelö7 Why would I try it if the idea itself doesn't appeal to me at the forefront?

0ßelö7

@BalarkaSen flagged

Semiclassical

I think it matters who the target of the trolling is.

Anonymous

The real troller is AFT. You should learn from ~~him~~ her.

0ßelö7

@Kaumudi.H Do you take that attitude often?

Semiclassical

4:14 PM

Your garden variety internet troll is just kinda boring

user228700

@0ßelö7 No, not with everything.

user228700

Certainly with trolling :-P

Secret

The following is an example of trolling:

This is not trolling

Balarka Sen

@Semiclassical yeah I like when grand scheming goes into trolling

0ßelö7

You're being discriminatory

John Rennie

4:15 PM

I think you need to to distinguish trolling from teasing. With trolling the intent is to anger or offend while with teasing the intention is to entertain.

user228700

@0ßelö7 Who, me?

0ßelö7

@BalarkaSen DJT

Balarka Sen

loool

0ßelö7

Literally trolled his way to the White House. Should be an inspiration to all.

3

user228700

x'D

Balarka Sen

4:15 PM

the trumpet man

Semiclassical

"u mad bro?" seems the pithiest summary of what reaction a troll wants

Balarka Sen

everyone's favorite

Secret

Semiclassical

for me, the target matters when it comes to trolling

0ßelö7

@Semiclassical Nah, you need to subliminally troll people.

Secret

4:16 PM

trying to find a SR meme, but failed

more accurately, trying to find a +--- meme

Semiclassical

something something west coast

Secret

> subliminally troll people

I am actually pretty good at that lol

Semiclassical

the usual kind of forum trolling is pretty terrible

Secret

but anyway...

Semiclassical

if you're bothering people who are just trying to have a conversation, that's just dumb

Balarka Sen

4:18 PM

"10 hour subliminal ASMR with beatboxing to feel trolled"

John Rennie

@Semiclassical because it's neither clever nor witty

0ßelö7

+---

John Rennie

Oscar Wilde trolled like mad, but he was witty and entertaining with it :-)

Balarka Sen

I love Wilde

Semiclassical

by contrast, trolling which punctures inflated egos is good fun

Sid

4:19 PM

@0ßelö7 Well... people wanted to be trolled obviously. :P

John Rennie

@Semiclassical iif it's entertaining and witty

Sid

@JohnRennie Wilde was a genius

Balarka Sen

@Sid You mean he was Wild.

Semiclassical

I guess my point is that I think the target matters as much as the manner

0ßelö7

Wildberger is a subliminal troll

John Rennie

4:23 PM

@Semiclassical I disagree. Because someone else is an arse that doesn't make it right for you to be an arse as well.

Balarka Sen

@0ßelö7 tfw you see a wild Mac stopping by in the woods to teach you some rational trigonometry

Semiclassical

I guess the question is to what extent 'trolling' is inherently mean-spirited

I think that it's hard to avoid at least some degree of venom in it

Secret

test completed

0ßelö7

@BalarkaSen math might be just as bad as physics because we don't even define infinity

Putting an adjective on a word does not give it that property

Balarka Sen

The infinite 0celo7

0ßelö7

4:32 PM

@BalarkaSen I want to know what he dislikes about Dedekind cuts but I also don't really care

Balarka Sen

I dunno he really has a thing for irrational numbers

Secret

He just don't like infinity

he found things like surds nice because they can be represented exactly as composition of operations, with no approximation needed

which is often the case whenever we want to compute nontrivial angles of trigonometric functions

Avantgarde

Any way to delete specific history on chrome?

Secret

(recall we calculate those using the taylor series)

Balarka Sen

not all algebraic irrationals can be written as surds though, that's the fundamental result in galois theory

Anonymous

4:36 PM

@Avantgarde Go to the history tab and delete to your heart's content. :P

Anonymous

chrome://history/

David Z

@ACuriousMind Nope. Maybe I can get back to it at some point, but I'm definitely not the best person to do it because my JS expertise is weak.

Avantgarde

@Blue Oh yeah, I know that. Clicking my way through all those will take me a lifetime

How hard is it to add a 'delete all selected' option in there

Balarka Sen

expunge and burninate everything then

Anonymous

@Avantgarde That option is there.

Avantgarde

4:39 PM

@Blue SHOW ME

Anonymous

0ßelö7

Chegg?

Avantgarde

@Blue Yes, so you're just ticking your way through all your undesired items, right?

0ßelö7

I'm disappointed

Anonymous

@Avantgarde Yup.

Anonymous

4:42 PM

@0ßelö7 You're the one who recommended it :P

Avantgarde

Firefox >>>> Chrome

0ßelö7

@Blue Are you sure?

Avantgarde

I should've never shifted to Chrome from Firefox

Anonymous

Jul 20 at 13:26, by 0celoñe7

@Blue They are thorough.

0ßelö7

I know I said that

I said it was a good service, sure. But so is cocaine

Anonymous

4:45 PM

@0ßelö7 You shouldn't be disappointed with good service, no matter which color :D

Balarka Sen

except cocaine isn't disappointing

0ßelö7

@Blue I feel like there's a racist joke in there somewhere.

Sid

@BalarkaSen It isn't. Am I supposed to try that sometimes?

Anonymous

@0ßelö7 Nah. It's just a Shakesperean reference

Anonymous

It's from "As You Like It" iirc

Balarka Sen

4:47 PM

what a farce

@Sid Modulo controversy, for sure

0ßelö7

I want to try cocaine, maybe

@BalarkaSen seems to really like it

nasil

i have 3 dimensional system of linear equations which are singular because it has infinitely many solutions. How can i plot these solutions in MatLab

0ßelö7

Wait a long time.

nasil

when i try to X = linsolve(A,B)

it gives me

Warning: The system is rank-deficient. Solution is not unique.
> In symengine
In sym/privBinaryOp (line 973)
In sym/linsolve (line 63)

@0ßelö7 but i dont want to die :(

me veri sed

Balarka Sen

@Blue You like Shakespear?

no that's the wrong guy

Shakespeare

Anonymous

4:53 PM

@BalarkaSen Sort of...not bad

nasil

no me likey not dieyingz

Anonymous

I prefer Bernard Shaw more though

Balarka Sen

Then I bet you would like Hopsin

Also relevant to the drug conversation here

Anonymous

@BalarkaSen wtf...u...u...hipster :P

Balarka Sen

@Blue see the full thing

and don't do drugs. get hugs instead.

user228700

5:00 PM

@BalarkaSen From exactly where in the underground depths of ur residence do you manage to acquire hugs? :-P

Balarka Sen

it's from the video

great lyrics

Avantgarde

hugz

user228700

Oh, God.

user228700

38 seconds of my life that I will forever regret.

Avantgarde

hugsies

huggles

Balarka Sen

5:03 PM

@Kaumudi Ow, that review is an absolute gem, why would you say that

user228700

:-P I'm sorry, man. Another time, perhaps. My mind is too fried for that sort of thing just now.

what a normie

@Kaumudi.H Fried

@Avantgarde ???

@SirCumference Hey there. Why so surprised?

Sir Cumference

5:09 PM

@Avantgarde In my experience using both, I notice Firefox lacks a lot of the extensions that make Chrome so great.

user228700

@BalarkaSen :-(

Avantgarde

@SirCumference I don't really use a lot of extensions. But why hasn't Chrome added a 'delete all selected' option yet?

Nonetheless, Chrome is nice

Sir Cumference

@Avantgarde What ya mean, "delete all selected"?

Balarka Sen

this must be the most coherent Filthy Frank video I have ever seen

+1

Sir Cumference

@Avantgarde Also, you should look into extensions (or at least userscripts). They significantly improve websites

Avantgarde

5:13 PM

@SirCumference There, I edited my sentence. I mean, if you want to delete specific sites from your history, you can search and filter them. Great. But then you'd have to click on each, one at a time, and then in the end, delete. Life would be easier if they had an option which enabled me to automatically select all the sites instead of doing it manually

@SirCumference I was just looking into extensions I might use. What are your favorites?

Sir Cumference

@Avantgarde Yeah, I agree

@Avantgarde Well what websites do you go on often?

Avantgarde

@SirCumference Just a few. YouTube's at the top, I think

Sir Cumference

If Stack Exchange is one of them, I strongly recommend this

chrome.google.com/webstore/detail/view-vote-totals-without/…

Avantgarde

@SirCumference Ooh interesting

Sir Cumference

@Avantgarde This one is a godsent. It resumes a youtube video from where you left off, so you don't have to rage if you accidentally leave the page. You can also prevent it from resuming if you are close to the end of the video.

These might be on Firefox, I'll have to check

But yeah, that video resumer has been extremely useful

Avantgarde

5:23 PM

@SirCumference Wait, isn't that now an automatic thing? I notice that when I leave a music album in the middle and come back later, it starts where I left off. (Or maybe not exactly where I left off ... I'm not sure about that)

Prathyush Poduval

@SirCumference How exactly does that work?

Sir Cumference

@Avantgarde I thought it only happened on long videos?

@PrathyushPoduval Don't ask me :P

But I enjoy it

Prathyush Poduval

Seems like a interesting thing to try out

Avantgarde

@SirCumference I have no idea. My albums range from around 40 mins to 2 hours

Sir Cumference

@Avantgarde Yeah, I think it normally only happens on long videos. This extension will work on all kinds

Anonymous

5:25 PM

@PrathyushPoduval Probably it just plays with the html

Prathyush Poduval

But is the information sent to all users?

Anonymous

@PrathyushPoduval What information?

Prathyush Poduval

How many downvotes and upvotes

Sir Cumference

@PrathyushPoduval If you mean, "does it display downvotes and upvotes regardless of your reputation", then yes

Anonymous

The users who install the script will be able to view the information.

Anonymous

5:27 PM

@PrathyushPoduval This is the code.

Prathyush Poduval

@SirCumference Nope, my question was how does it get the number of upvotes and downvotes....

Sir Cumference

@Blue It's actually more complicated than that, since that stuff is retrieved from the server and doesn't show up in HTML until after. It's beyond what I could program.

Anonymous

@PrathyushPoduval It's stored on the server for sure

Anonymous

It gets the information from the server

Anonymous

Read the code if you want to know. I linked it there ^

Sir Cumference

5:28 PM

@PrathyushPoduval It uses some trick that the SE team know about, but don't care to patch

Prathyush Poduval

@Blue If it was public information, why can't they just show it to everyone?

@SirCumference Yeah, that makes sense

Anonymous

@PrathyushPoduval The SE wanted to design it like a game. Gain reps, gain perks.

Anonymous

That makes participation more exciting

Anonymous

For example if you have 10k you can view deleted answers

Semiclassical

the SE world looks way different once you get that 10k

soooo much deleted crap

Prathyush Poduval

5:31 PM

@Blue Yeah I know about that

Anonymous

@Semiclassical There must be some JS lying around to hide it for >10k users

Semiclassical

probably, but I didn't say I minded it

just kinda funny

Anonymous

27

Q: Hide deleted answers with certain characteristics

Today I exceeded 10K reputation on Stack Overflow, and I see deleted answers. I am now faced with pages like Convert HTML to PDF in .NET where half the answers are "deleted." Among these are many non-answers deleted by diamond moderators, and a self-deleted answer deleted on Nov 25 '09. I fi...

Avantgarde

@SirCumference Hm alright. Thanks!

Ad blocking extensions are <3

Anonymous

@Avantgarde I just need a "any paywall remover" extension now :P

Avantgarde

5:42 PM

@Blue You need a paper?

Anonymous

@Avantgarde Yeah. Many papers I can get from Scihub though. I'm fed up of paywalls when trying to download a movie or some hard-to-find book (which isn't on Libgen)

Anonymous

Scihub and Libgen are lifesavers really

Avantgarde

But you can get papers from your uni internet, no?

Anonymous

@Avantgarde Maybe...I haven't tried that yet... (I'm too lazy to go the library often. Quite far from my building. XD)

Anonymous

I should go there sometimes...

Avantgarde

5:49 PM

@Blue Not just the library, but any university internet connection will enable you to get the papers

Anonymous

@Avantgarde Hmm. I should take the Wifi password from the office guys then. Thanks for the information.

Avantgarde

@Blue Sure :)

Anonymous

@Avantgarde I feel like you stay in or nearby West Bengal. ;) You seem to know about Mohon Bagan and all....

Sid

@Blue Mohun Bagan?

Anonymous

@Sid Yeah, that

lılostafa

6:01 PM

@Blue movies? try piratebay :)

Anonymous

@lılostafa Noooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo. That virus....that cancerous site....!

Anonymous

Last time I downloaded something from piratebay my PC was filled with Chinese malware

Avantgarde

@Blue Oh no, it's quite popular, I think. Anyone who knows a bit about Bengal and football would've at least heard the club name

Sid

That ^

They are quite famous.

@Blue Excellent site, obviously

lılostafa

@Blue Next time you wanted something, tell me and I'll find the right link for you. (There are other russian, chinese, Indian and even Iranian websites that gives you direct, safe download links)

Anonymous

6:06 PM

Anonymous

@lılostafa You were the one who gave the link for Matlab..lol

Anonymous

Nah nah...not trusting you again :P

Sid

You get free Chinese to learn. What could be better?

lılostafa

@Blue I didn't. I just said search piratebay

Anonymous

Jun 18 at 22:12, by Mostafa

@blue It seems the latest 32-bit version is R2015b

Anonymous

6:10 PM

There was only one link for the R2015b

lılostafa

@Blue I can give you direct (not torrent) download links for Matlab R2015b 32-bit right now if you want

Anonymous

@lılostafa I use the online version nowadays. But okay, you can give if you wish :P

Anonymous

But please, no CHINESE virus.

lılostafa

@Blue goo.gl/i5dHnZ this is part 1. there are 4 parts. just change "part1" to 2 and 3 and 4 for other parts

Anonymous

@lılostafa Thanks. I'll save it.

Anonymous

6:18 PM

@lılostafa Where to change part?

Anonymous

How?

lılostafa

@Blue In the url

Anonymous

@lılostafa There's no part 1 or 1 written in the url

lılostafa

the above ^ is the shortened url. I mean the one after you're redirected

Anonymous

@lılostafa After redirecting it starts downloading directly

Anonymous

6:20 PM

Give the full url in that case...

lılostafa

but you can see the url

Anonymous

I can't...

Avantgarde

Mostafa to lilostafa?

lılostafa

@Avantgarde lılostafa. Just a change of notation

Anonymous

Can anyone sign up and ask questions on ResearchGate?

Anonymous

6:28 PM

Is it a good website?

Bernardo Meurer

6:43 PM

@ACuriousMind Are you around?

Avantgarde

@lılostafa Fourier transformed your way to lilostafa

@Blue No idea, no idea.

Anonymous

@Avantgarde It seems they need an institutional email id...I'm not sure if I have one

Avantgarde

@Blue You should. Or you will, soon.

CooperCape

So if the wiki page is using +--- for the Minkowski metric and it says that $s^2$ is spacelike when it's negative we can just flip it round for -+++ and say that it's spacelike for when it's positive, right?

Avantgarde

@CooperCape yes, you got it. But you need to know why that happens.

Anonymous

6:53 PM

@Avantgarde Probably. They said they'll upload our grades on the website. I think they meant personal website. Let's see.

Anonymous

Or else I'll try asking the HoD once.

Avantgarde

@Blue Yeah ask someone. Every person affiliated to the uni has an email address

CooperCape

@Avantgarde the way I see it $\eta$ in +--- is the same as $-\eta$ in -+++ however I might be wrong...

ACuriousMind

@BernardoMeurer sort of

Mithrandir24601

That's a new one: "An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated. "

Avantgarde

7:03 PM

@CooperCape The $\eta$ tensors are different because of the sign difference. Think of the line element $ds^2 = \eta_{\mu \nu} dx^\mu dx^\nu$. The sign of $ds^2$ tells you about the time/space/light-like character. When you use a different sign convention, you're essentially multiplying $ds^2$ by $-1$

Balarka Sen

why is this sign convention a thing

who in their right mind would use +---

Avantgarde

@CooperCape So the sign you look for, when determining the nature of separation of events (space/time-like) changes. Plus goes to minus, and minus goes to plus

@BalarkaSen It's used in particle physics because that gives you $E^2 - p^2=m^2$ (Einstein's mass-energy relation), where $p^2$ is the 3-momentum squared

CooperCape

Every so wacky...

Balarka Sen

@Avantgarde A different sign convention would probably change some signs in that relation, right?

Why would that be a problem?

CooperCape

@BalarkaSen According to Sean Carroll - Field Theory Books.

well he says "Especially..."

Avantgarde

7:11 PM

@BalarkaSen It'll just multiply the whole equation by $-1$. So with $-+++$, you'd have to write $-E^2 + p^2 = -m^2$. Of course, it's the same as $E^2 - p^2 = m^2$, but too many minus signs make things ugly :P

Balarka Sen

...

Phase

Is the intuition behind the Laplace transform just taking a sort of pseudo-power series, except that instead of integers it ranges over the non-negative reals, where the coefficients are expressed in terms of a continuous function f(t)?

Anonymous

What does $E_{Fn}$ and $E_{Fp}$ stand for ?

Anonymous

In the second diagram

Anonymous

7:16 PM

I know $E_{F}$ refers to the Fermi energy.

Anonymous

@Avantgarde Umm, do you know?

Anonymous

3

Q: Why are there two quasi Fermi levels and only one Equilibrium Fermi level?

I am reading a book and I'm trying to understand the concept of quasi Fermi levels. For example, A steady state of Electron Hole pairs are created at the rate of $10^{13}\ \mathrm{cm}^{-3}$ per $\mu$s in a sample of silicon. The equilibrium concentration of electrons in the sample is $n_0 = 1...

electrons semiconductor-physics electronics

Anonymous

Hmm, found something...

Avantgarde

@Blue (I think) Quasi Fermi energies for electrons and holes respectively

The Fermi energy level splits when a voltage is applied

Anonymous

@Avantgarde Okay, but why?

Anonymous

7:31 PM

@Avantgarde Huh, found it

Avantgarde

@Blue I have no idea about that. Hope you got it.

don't you have an electronic devices book?

Anonymous

@Avantgarde I have. But the problem with these books are that they are written half-heartedly with lots of information missing.

Avantgarde

@Blue which one are you using?

Anonymous

I use the books by Neaman, Kasap and Streeman.

Anonymous

3 books.

Anonymous

7:37 PM

And, as far as our professor is concerned, she knows a lot but can't teach at all.

Avantgarde

Hm, I think I've read some of Streetman and it was good.

bolbteppa

7:59 PM

Write down a list of functions which you interpret as solutions. We want to ask, what equations generated those solutions? Aha! The theory of Abelian and Jacobian varieties! Anybody see why?

Bernardo Meurer

8:09 PM

@ACuriousMind Have you read Descartes?

bolbteppa

Yes

Cogito ergo get lost throughout Europe trying to find yourself in the 1600's

ACuriousMind

8:54 PM

@BernardoMeurer Some of it years ago, why?

Bernardo Meurer

@ACuriousMind We're just going over it in Philosophy, I was wondering what you think of his Meditations

ACuriousMind

@BernardoMeurer I think they're nice up to the point where he literally pulls a deus ex machina :P

0ßelö7

"your Windows password will expire tomorrow"

@ACuriousMind HALP

what happens if it expires

ACuriousMind

What password?

0ßelö7

@ACuriousMind see edit

Bernardo Meurer

9:04 PM

@ACuriousMind What do you mean by "pulling a deus ex machina"?

ACuriousMind

@0ßelö7 I have no idea what that message means

0ßelö7

@BernardoMeurer he means pulling a god out of the machine

ACuriousMind

@BernardoMeurer Well, he establishes all this nice scepticism and then says "but God couldn't be so mean as to deceive us, so I'm gonna trust my senses anyway"

Bernardo Meurer

Ah

Yes

Lol

0ßelö7

I like my interpretation

@ACuriousMind I am [redacted] please help. I don't understand representation theory at all

Bernardo Meurer

9:05 PM

I got pissed today when in Meditations III he uses the thing he's trying to prove to prove itself

0ßelö7

I don't know why this is so hard

Bernardo Meurer

I was like "You can't do this shit"

0ßelö7

@ACuriousMind I need more complication notation for this

Does "the representation is semisimple" mean "the $RG$ module induced by the representation is a semisimple module"?

ACuriousMind

@0ßelö7 What?

@0ßelö7 It means the representation decomposes as the sum of irreducible representations

0ßelö7

@ACuriousMind I know, but that doesn't make sense

ACuriousMind

9:12 PM

I don't know what $RG$ is

0ßelö7

what is the Socle of a representation supposed to be then

@ACuriousMind group algebra

@ACuriousMind I think that's the same as the $RG$ module being semisimple.

ACuriousMind

@0ßelö7 I think that for a semi-simple rep, the socle is the whole module.

0ßelö7

The submodules of an $RG$ module are precisely those left invariant by the representation, and they carry a representation.

@ACuriousMind Yeah, but one of the homeworks has non-semisimple representations.

ACuriousMind

@0ßelö7 So?

0ßelö7

@ACuriousMind I can't figure out if you have no clue what I'm talking about, I'm saying something wrong, or what

ACuriousMind

9:22 PM

@0ßelö7 I have no clue what the problem is supposed to be

0ßelö7

The problem is to compute the socle of a representation and I think that means the socle of the RG-module.

ACuriousMind

Yes, that sounds right, I don't know much about non-semi-simple stuff, though

0ßelö7

@ACuriousMind Ok thanks

@GPhys done with the GR?

Phase

could someone write quickly or give me a link as to why $L(\hat Df(t)) = sY(s) - Y(0)$ if $f(t) = Y(s)$

0ßelö7

that's incorrect

do you mean $\mathcal L\{f\}(s)=Y(s)$?

and should that be $sY(s)-f(0)$?

Phase

9:31 PM

I dont get what you mean

0ßelö7

Forget it

Phase

Is $L(f(t)) = F(s)$ not standard notation?

if the L was the right font

idk the font alteration thing

0ßelö7

that is standard notation but I don't know what $f(t)=Y(s)$ is supposed to be

or what $Y(0)$ has to do with anything

@Phase there is no $F(s)$ in what you wrote

Phase

Whoops brain melted

Replace Y's with F's

0ßelö7

Are you asking why $\mathcal L\{df/dt\}(s)=sF(s)-f(0)$?

Phase

9:34 PM

Yes

0ßelö7

Integration by parts.

Phase

Oh right

I'm a dumbass rip

0ßelö7

9:56 PM

@ACuriousMind do you think one should box definitions in talks?

0x90

10:09 PM

Can someone help me with this question please?

https://physics.stackexchange.com/questions/356543/are-there-ensembles-for-non-
equilibrium-physics

ACuriousMind

@0ßelö7 I have no opinion on that

Bernardo Meurer

@JohnRennie I'm now running a GPU-accelerated terminal emulator for MAXIMUM SPEED

Phase

@0ßelö7 I did the integration by parts [after a long break playing DS], but I've ended up with $\int f(t)e^{-st}dt$ and am unsure how to proceed

probably really obvious

GPhys

@0ßelö7 hahahha no

@0ßelö7 I couldn't figure out his hint for this one i.imgur.com/nOSbIYC.png

although I think I know a different way to do it: orthogonally diagonalize the metric tensor

0ßelö7

@ACuriousMind I'm completely rewriting; do you want to look again when it's done or have you had enough?

@GPhys ugh

why are they making you do linear algebra

GPhys

10:24 PM

unless there's something wrong with orthogonally diagonalizing the metric tensor I'm probably just going to put that

ACuriousMind

@0ßelö7 I don't think I can say anything useful about it, to be honest

0ßelö7

@GPhys My go-to reference is section 2.4 of Wolf, Spaces of Constant Curvature.

Basically, if your vector space has a nondegenerate bilinear form, it is isometric to something with a metric tensor of the form $diag(-1,-1,...,1,1,1)$

that's exactly what you're trying to do

his proof is quite good

GPhys

is my ortho suggestion wrong? also is the Wolf proof the one the problem is sketching out?

0ßelö7

I don't remember how Wolf's proof works, I just remember it being very good

I hate linear algebra

GPhys

10:41 PM

@0ßelö7 looks like it's impossible to find

Jasper

@0ßelö7 I think nonlinear algebra is much harder, lol

0ßelö7

@GPhys what is impossible to find?

Jasper

@0ßelö7 Boxing or not boxing is a matter of aesthetics. Do what you think is beautiful.

GPhys

@0ßelö7 the book, without raiding my uni's library ofc

and I just went home

0ßelö7

found it!!

@GPhys it is on libgen

Jasper

10:52 PM

@BernardoMeurer I had a lecturer in a philosophy class who was teaching us about reasoning, and he thought that if a person lived forever and grew taller and taller then he would reach infinite height. He didn't know anything about a convergent series of positive terms, lol.

GPhys

@0ßelö7 is there a problem with diagonalizing it?

Bernardo Meurer

@Jasper sick

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