Stop with the computer science PLEASE

@0celouvsky such a luddite :P

@EmilioPisanty fyi re recent arxiv chgs was talking about this, but maybe they already chgd dir again since written wired.com/2016/05/…

@JohnRennie How can I do something like board.cell.get

i.e. two levels of struct

or how it's called

@0celouvsky I have started to read both Schwarz and Peskin, I personally like the latter as it's kinda more understandable from an introductory point of view. Btw, do u know any material which talks in depth about 't Hooft-Polyakov monopoles?

Why do people assume I know QFT?

Cause u suggested me books in QFT...

I don't think I did.

Really? Oh yeah sorry that was someone else, just checked. But do u happen to know any?

Many, but I won't recommend any.

@vzn sorry, I don't understand. Can you repeat in English?

@dmckee chat.stackexchange.com/transcript/message/36419196#36419196

Savage Pisanty

goddamit, wired

22 trackers and they still have the nerve that my ad blocker is bad for them

now, which of these trackers do I need to yellow-light to get back into Wired?

What's wrong with frackers?

Trackers

@EmilioPisanty Amazon adsystem?

@0celouvsky Everything

Trackers are fucking spyware

^ that

So?

What do they do

@0celouvsky They literally gather your information without permission and use it for their own gain

Companies use them to sell your info to companies

Facebook track every single webpage you visit that has a facebook like button

And before you go check, yes, PornHub has a facebook like button

@BernardoMeurer the real question there is whether the facebook button does browser fingerprinting

@BernardoMeurer Privacy Badger is your friend on that.

@dmckee I know, I use it :)

@EmilioPisanty I'd bet my ass so

@BernardoMeurer that did seem to work, btw

@EmilioPisanty :)

I give them my permission. Good for them if they can make some money

What are you people doing that you're so concerned about "privacy"

@0celouvsky Cool

@0celouvsky None of your business, or anyone else's

@0celouvsky abstrusegoose.com/433

@0celouvsky it starts getting a bit more tricky if they use the data they gather to infer ethnicity and then use that to do illegal things like advertise premium vs shitty housing depending on whether you're white or black

That's pretty clever.

@BernardoMeurer Without looking at the code I can only guess, but assuming the celldata is stored in an array of some kind and board is a struct containing that array and some other stuff you use board.cells[index] or board.cells[xindex][yindex].

I don't see why that's illegal.

@ACuriousMind if people want to watch me, that's a lick on them?

its not too interesting

@0celouvsky you don't see why that's illegal, or you don't see why it should be illegal?

Both

@dmckee I ended up taking a simpler route anyways :) Thanks!

uh.... it's discriminatory and it perpetuates systemic discrimination?

Sure. So what?

im assuming you're oversimplying this in any case

@0celouvsky There's a word for people who thing discrimination based on ethnicity is OK, but if you're OK with that label then I guess it's all in the game.

I doubt they're showing mansions to poor white people

I'm sorry to put it in such crude terms.

@0celouvsky Strangely enough the politicians, law enforcement types, and their enablers who trot out that line all the time get angry when people start peering into their secrets.

Reasonably so

@EmilioPisanty Black people generally have lower incomes, so it makes sense to me that they'd see lower class ads. Nothing to do with them being black, it's an income thing.

I expect impoverished communities in West Virginia to get the same treatment.

@0celouvsky with respect, that's not what's going on at the moment. There's an income component to advertisement segments, and in addition there's an ethnicity component.

@0celouvsky The reaction of those in power to sousveillance makes in quite clear that they don't believe that. Or at least don't believe that it applies to them which amounts to the same thing.

Facebook was quite public with this initially.

@dmckee @0celouvsky Is there an English word that is general for either row or column?

@BernardoMeurer Not that I know of.

"Rank" and "file" are alternates, but they are usually taken to be orthogonal to one another.

e.g. You want to talk about either a row or column in a matrix without specifying which one it is

@BernardoMeurer rowlumn

You could press one into service, but you'd have to make it quite clear that you're using it in a special way.

is totes a word

@EmilioPisanty because income correlates with ethnicity.

@EmilioPisanty lol

Better stop this conversation tho

@dmckee I'll just make two functions I guess

It's clearer anyway

@EmilioPisanty Sounds like a wild animal to me.

The fearsome rowlumn roams the sheets of Excel valley.

@EmilioPisanty Speaking of wild animals it seems there are rumors of a possible tasmanian tiger sighting.

@dmckee are there?

huh

was this in some prairie or something? Or near the back of a genetics lab? =P

@EmilioPisanty I find myself skeptical but excited by the possibility.

In the wild.

But you'd think that an apex predator would have a harder time going unnoticed for decades than some smaller varmint.

@dmckee NZ Tasmania is big, though

and there's plenty of sheep food lying around

It fits all of middle earth!

npr.org/sections/thetwo-way/2017/03/30/522091683/…

:36420021 yeah, just realized that

pretty dumb on my part

oh well

Is Tasmania on the mainland?

@EmilioPisanty And sparesly populated, I think. So not impossible.

@0celouvsky island

@dmckee even if they're there, though, how many can there actually be, and how likely are they to be enough to sustain a growback?

@EmilioPisanty Yeah. There'd have to be a fearsome genetic bottleneck.

@dmckee I didn't know you could use Brit-level euphemisms

Hi, everybody.

@DanielSank Hi @DanielSank

-_-

@DanielSank do you remember what this was about?

@vzn claims that there was a site redesign, but that doesn't quite mesh with my recollections

Remember?

Haven't seen it before.

I think arXiv had a drop-down banner inviting folks to take a user survey?

and after that went away the design was unchanged?

back in ~september of last year

@BernardoMeurer a struct can contain other structs as member variables, or pointers to other structs.

@JohnRennie Yeah, I figured it out and chose to avoid it :P

@EmilioPisanty I remember that, yeah.

They were proposing stuff like comments etc.

I think arxiv should remain arxiv and other sites can host comments with links to arxiv papers.

@DanielSank do you remember whether there were actual changes to the front page, though?

@EmilioPisanty No idea.

Who looks at the front page.

@DanielSank I use it as a landing page with some frequency

I think

I see.

hivemind, is this too busy?

@EmilioPisanty am not claiming any site redesign. arxiv is legendary in how little the design has changed literally in decades. (maybe few sites have changed less.) there are new directions in management reflected in their request for a survey. the wired article is a pretty good summary.

@vzn then as usual it's probably me being only partially able to decode textspeak.

@EmilioPisanty I think it's fine.

@DanielSank thanks, that's good to know

Weird. I ignored vzn the other day because I didn't want to continue our discussion, but now there's no way to un-ignore.

This changes the nature of the ignore feature considerably.

@DanielSank there's probably one here?

Yay!

It worked.

@DanielSank There is, just go to the transcript, then click on their user name to get to the profile where you can (un)ignore people.

Thanks.

@ACuriousMind You used to be able to do it through the set of icons in the top right of the chat website screen.

Ignored users' icons were smaller, but clickable.

@DanielSank still are

That is still possible

vzn is not currently in the room, though

(as you can now see)

@EmilioPisanty That would explain it.

or see that you don't see

d'oh

@DanielSank ;-)

btw @DanielSank here's a Spanish-language challenge for you

How am I supposed to take a challenge while dancing around my desk?

That is a fantastic idea for a language learning tool!

lunch time

If you have $y = x +c$ then does it follow that $\frac{d^2}{dx^2} = \frac{d^2}{dy^2}$?

Oh yes I think it follows from the Chain rule for higher derivatives.

@Moses yes

@vzn yes... I am looking into the FMO complex... I read somewhere that the values of the function can be encoded onto the FMO complex's site energies...

@EmilioPisanty im not sure what to do with that information :-P

Why is this starred three times??:

@AccidentalFourierTransform just something to keep in mind next time something like this comes up again - it might be better to just close as off topic.

tbh, I dont usually vote to migrate

@EmilioPisanty woohoo! 219 hits, 3 fails!

I nailed it

and I dont even speak Spanish

@JohnRennie I do not know if I wrote it, but I saw that I teach high school, I follow the course twice a month. For you, the calculations can be immediate, but for me that I have never done them are difficult to me. I do not understand the connection with the f and the partial derivatives of the four-acceleration. And I can not make a tensiorale calculation. Could you give me an answer to my question please?

@TanMath this looks like a semi-pop-sci writeup of what youre looking into, also citing kauffman technologyreview.com/s/522016/…

wow, i just clicked over to this tab and saw a cat ready to punch something =P

@dmckee Are you around?

Or anyone who knows C well

@heather Can you go forward in time, learn more C than me and help me?

@BernardoMeurer depends - got any tachyons?

@heather Yes

@heather tsk tsk tsk

its an Italian cat

@BernardoMeurer weird song

can't say i'm a fan

I love it

Of course you do.

What does Michelle think about death grips?

She'd like it ironically

i'm very annoyed at this answer to my homework meta post

@0celouvsky Never asked her

@heather Welcome to what happens when you revive the homework debate ;)

I'm writing a comment(s) in response.

@heather Rek him girl

cant we just ban everybody?

there cant be off topic questions if there are no questions at all

@heather A tip: Try to not go back to "we already agreed upon this in DS's post" - if the top-voted answer on "Let's make the changes precise" says "let's not do anything" then that tells you it's not as agreed upon as you thought it was. The fact that that answer is not being overwhelmingly downvoted means people are not convinced action is required.

@ACuriousMind ::sighs::

I suppose.

@DavidZ Are you around Grin Reaper?

@AccidentalFourierTransform yes, please

the cure for the human condition is to just launch all the nukes

YOU ARE BANNED... AND SO ARE YOU... YOU TOO ARE BANNED...

Huh

what did you say?

I posted some TeX in and it broke

Somewhere in my notes I have a proof for the existence of geodesic frames

where would that be

wait...is such a thing even possible

It is, but how to do it without normal coordinates

@Slereah where u at

France

@Slereah I want a frame $\{E_i\}$ based at $p\in M$, defined in some open set $U$, such that $\nabla E_i(p)=0$ for each $i$.

How would I do this without normal coordinates

since $\nabla E_i$ is the conneciton

or $\approx$

it's the spin connection or some shit

Even if you use normal coordinates, I would like for it to be othonormal

there is a Gram schmidt algorithm for frames

but I don't know if it preserves the $\nabla$ condition

Ok, fix $p\in M$, let $\{e_j\}$ be an orthonormal basis of $T_pM$

Extend this to an orthonormal frame $\{E_j\}$ over $U\subset M$

@Slereah partition of unity black magic is helpful here

wait, why not just parallel translate along geodeiscs in a normal neighborhood

yerp, that work

@Slereah what?

The connection is just $\nabla_{E_i}E_j=\Gamma^k{}_{ij}E_k$

you speak a lot

put me on ignore then

why would I

then why are you complaining?

I did not

@vzn I already read that... it is really just a summary of the paper, which I already read...

The paper is quite interesting...I haven't seen similar approaches in the literature...

@vzn here's a question, can you turn a shortest-path problem into an optimization problem?

I feel that the fmo complex would be more suited to solve a shortest-path problem..

for example, the weights of the nodes would be the site energies, and the wieght of the edges of the graph would be the coupling constants between the chromophores of the FMO complex

Surely, we can also probably set up an optimization problem...

@TanMath Yes, of course.

Shortest path problems are optimization problems by definition.

@TanMath Yeah that's what path integrals are doing, more or less.

@DanielSank can I ask some general questions regarding the FMO complex?

It seems that the excitons have a diffusive transport aspect to it...

is it true that these excitons are just oding diffusion?

after all, it is said they perform quantum walk, while classical diffusion is also based on a random walk

@DanielSank really?

I guess path integrals are like the principle of least action...

@TanMath oding?

@TanMath As always, don't ask to ask. Just ask.