The h Bar

11:00 AM

I just said I'm talking about number 1 in his answer

@YuzurihaInori So there are people around who claim it is meaningless totalk about the inside of a black hole because (in our universe) that interior is physically inaccessible.

I don't know whether you would share that view or not ...

Balarka Sen

@0celo7 You said some garbage about $\dim M \geq 3$. That's the third point in his answer, man

0celo7

:(

"In dimensions>2 it can be taken connected."

Does this not show up on your screen

Balarka Sen

Oh.

Yuzuriha Inori

@JohnRennie So it all comes down to individual opinions rather than universal consensus?

Balarka Sen

11:01 AM

No I have a small screen

John Rennie

But we can compute the time that passes for the observer falling into the black hole, and we find that time is finite.

So if you're the person faling into the black hole does it make any sense to you that you would just cease to exist at the horizon?

Balarka Sen

@0celo7 Sorry about that, whoopsie. Ok, I'll think about that bit now.

0celo7

thanks

John Rennie

Doesn't it make more sense to assume that you would fall on through the horizon to a messy (but quick) death at the singularity?

Yuzuriha Inori

@JohnRennie No, it won't. But I can't send that message to anyone that I still exist.

@JohnRennie Only I will see myself die. No one else would see that.

John Rennie

11:03 AM

The observers outside have simply made a poor choice of coordinates. The interior exists but is accessibe only by falling into it, and as you say that causally disconnects you from the rest of the universe.

0celo7

@BalarkaSen Is it supposed to be obvious why a regular preimage generates the desired class?

Apparently this follows from intersection theory but I don't know it

Balarka Sen

Nope, that's exactly what I was hung up on the last time I tried to understand it.

0celo7

every single answer on this question stops there

John Rennie

@YuzurihaInori what I'm getting at is that you should always study th maths whether or not you think it's physically relevant. The only way you will find out whether it's relevant or not is to study the maths. Do that first and worry later.

0celo7

like it's supposed to be obvious

Balarka Sen

11:05 AM

It's some standard argument in geometric topology. I'm going for a little walk, let's see if I can rediscover it.

Yuzuriha Inori

@JohnRennie I concur. Maths comes first. Physical treatment can be done in due time.

John Rennie

I guess I'm saying: don't be John Duffield ! :-)

Yuzuriha Inori

Which reminds me, John, can you answer another small question?

0celo7

I say **** the physics

Yuzuriha Inori

@JohnRennie xD

0celo7

11:06 AM

ok @BalarkaSen good luck

John Rennie

@YuzurihaInori the last small question just took us an hour! :-)

But ask anyway!

Yuzuriha Inori

@0celo7 So I should rather do get maths degree than a physics one?

0celo7

obviously

John Rennie

@YuzurihaInori lots of mathematicians become physiscists, and some (a smaller number) physicists become mathematicians. Choose the course you are going to enjoy most and let tomorrow take care of itself.

@YuzurihaInori what was the small question?

Yuzuriha Inori

@JohnRennie I just read a paper that proved mathematically the existence of two retarded field, and a set of Maxwell like equations from one continuity equation.

John Rennie

11:11 AM

OK ...

Yuzuriha Inori

The continuity equation had two parameters. If one identifies the parameters with the electric charge density and current density, the fields become the electric and magnetic fields, and the Maxwell like equations come out to be exactly Maxwell equations.

Now, as far as I know, the full set if Maxwell equations only listen to Lorentz transformations, not Galilean ones. So if, charge conservation gives Maxwell, then charge conservation is not a part of Galileo.

Is my analysis correct?

0celo7

the R word is not acceptable

John Rennie

I don't think even the Maxwell equations dictate that charge is conserved

Yuzuriha Inori

arxiv.org/pdf/0812.4785.pdf

@JohnRennie Wot? There is a continuity equation, which dictates that.

0celo7

@JohnRennie div J = 0

Yuzuriha Inori

11:14 AM

en.m.wikipedia.org/wiki/Continuity_equation

John Rennie

@0celo7 is that part of the Maxwell equations? I would have thought not.

Yuzuriha Inori

@0celo7 Wasn't it $\div J = -\partial \rho / \partial t$ ?

@JohnRennie Divergence of one of the equations with another substitution yields it

John Rennie

@YuzurihaInori div is \nabla\cdot

Yuzuriha Inori

My phone doea not show Latex in chat. So I don't know what I am typing :( Bad phone.

0celo7

@JohnRennie of course it does

Yuzuriha Inori

11:18 AM

The continuity equation says that if charge is moving out of a differential volume (i.e. divergence of current density is positive) then the amount of charge within that volume is going to decrease, so the rate of change of charge density is negative. Therefore, the continuity equation amounts to a conservation of charge.

Quoted from wikipedia

John Rennie

OK. I freely admit that electrodynamics is far from my strongest subject, mainly because I found it really tedious at university.

0celo7

@JohnRennie it's just $\delta^2=0$

$\delta F=j\implies \delta j=0$

Yuzuriha Inori

Okay, I also found a paper that derives GR from conservation of mass and energy. (_)

John Rennie

You probably need to ask someone who knows what they are talking about :-)

0celo7

@Slereah Big if true arxiv.org/abs/1804.06825

Yuzuriha Inori

11:19 AM

arxiv.org/pdf/gr-qc/9703059.pdf

John Rennie

@YuzurihaInori Shrug. Theoreticians are endlessly inventive in finding new and interesting avenues to explore, but I don't recall that paper overturning our ideas about space and time.

The divergence of the stress-energy tensor is zero, and this is certainly very important in the construction of GR.

Yuzuriha Inori

All bright guys down here, right at this moment, I have 2 options. 1. Take mathematics as a choice for future studies. 2. Take physics as a choice for future studies. To be honest, I love physics more than maths, And, the thing I want to do is get a thorough understanding of the universe and maybe later in life, work on the TOE.

0celo7

then you are lost

John Rennie

@YuzurihaInori If you enjoy physics more then do physics

Physics degrees normally allow you to pursue a highly theoretical/mathematical track if you want to.

Slereah

If you don't enjoy math you're not gonna like doing TOE stuff

Balarka Sen

11:26 AM

@0celo7 I have made a little progress.

There's a wealth of equivalences that one needs to unearth to understand what's going on.

0celo7

ok

Yuzuriha Inori

@Slereah Not that I don't enjoy, but physics kind of flows naturally through me.

0celo7

until you find out that most of it is a lie

Yuzuriha Inori

@0celo7 Ouch,(@_@) !

Elaborate please?

0celo7

" In the extreme, this association
has led to the charge that invasion biology is rife with xenophobia and racism13
and is a lineal descendant of Nazism." lmao

Balarka Sen

11:29 AM

We have these equivalences (1) $PD : H^1(M) \cong H_{n-1}(M)$ (2) $f : H^1(M) \cong Hom(H_1(M), \Bbb Z)$ coming from the billinear pairing $\frown: H^1(M) \times H_1(M) \to \Bbb Z$ given by cap product (3) $i : H^1(M) \cong [M, S^1]$ an abstract isomorphism, which I am going to describe

John Rennie

@YuzurihaInori physicists often use calculations that are not mathematically rigorous.

Since Ryan is a mathematician this sears his very soul :-)

0celo7

@BalarkaSen (2) does not make sense as written

John Rennie

For example if I say spacetime is locally flat he will spontaneously combust :-)

0celo7

or is $f$ not the function from $M$ to $S^1$

@JohnRennie I use the ignore button when you do that

John Rennie

@0celo7 sorry :-)

Balarka Sen

11:31 AM

@0celo7 No, no, I'm calling the isomorphism $f$

0celo7

@BalarkaSen confusing because $f$ has been something different the whole time

Yuzuriha Inori

@JohnRennie Locally flat. Mathematicians have a problem on that? I don't see a reason why...

0celo7

also isn't that is just the UCT

Balarka Sen

@0celo7 yeah forget about that. I should also mention (4) $[M, S^1] \to Hom(H_1(M), \Bbb Z)$ given by sending $g : M \to S^1$ to $g_* : H_1(M) \to H_1(S^1)$. This is also an isomorphism

@YuzurihaInori Yes, it doesn't mean what John thinks it means

John Rennie

@YuzurihaInori locally flat would have to mean that the Riemann tensor was locally zero, and it isn't.

Balarka Sen

11:33 AM

Or, well, he's aware of that but just wants to use that terminology to annoy us :P

Yuzuriha Inori

xD

John Rennie

The best you can do is choose coordinates in which the Christoffel symbols are all zero.

Yuzuriha Inori

Understood sir!

Balarka Sen

If the Riemann curvature tensor was locally zero it would have been globally zero so might as well call it flat my man

Yuzuriha Inori

John, just a curiosity. Are you a prof?

John Rennie

11:34 AM

No :-)

Yuzuriha Inori

@BalarkaSen Incidentally, our universe is globally flat.

John Rennie

I was an industrial colloid scientist - a physical chemist really.

Balarka Sen

@YuzurihaInori Big if true.

0celo7

@YuzurihaInori biggest load of crap I've heard all day

it is only 7:34 tho

Balarka Sen

LOL

0celo7

11:35 AM

I have been reading ecology papers

so consider that

John Rennie

@YuzurihaInori But like a lot of physicists I had always been curious about the way GR actually worked, so when I retired I decided to learn some.

Yuzuriha Inori

@0celo7 I take it back

@JohnRennie Wait, retired?????

0celo7

John is 78

John Rennie

Yes, retired :-)

Balarka Sen

Well, I guess you can say "locally flat at a point", but meh. Just say "flat at a point"

John Rennie

11:36 AM

@0celo7 a slight exaggeration :-)

Yuzuriha Inori

I am sorry to call you by name Sir!

0celo7

@BalarkaSen ol feddie math.brown.edu/federer2011/federer_photos/Pages/5.html

Balarka Sen

Locally flat is a globally garbage terminology in the context of geometry

John Rennie

@YuzurihaInori don't you start calling me Sir. Only traffic police call me Sir, and they don't mean it!

Yuzuriha Inori

@JohnRennie Then Prof?

Slereah

11:37 AM

Herr Doktor Professor

Balarka Sen

@0celo7 So many drugs

John Rennie

Call me John.

Yuzuriha Inori

I mean, you are way older than me.

Balarka Sen

Mr Rennie

John Rennie

In the west we're not that fussed about age.

Yuzuriha Inori

11:38 AM

Wayyyyyy

I am just 18

Slereah

Sensei Rennie

Yuzuriha Inori

@BalarkaSen This is actually a good suggestion. But, if he's comfortable with John, then so be it

0celo7

Dr Rennie, ffs

John Rennie

Dr. Rennie

0celo7

he has a PhD

don't be a disrespectful sh**

Slereah

11:39 AM

I only have a master

Balarka Sen

That was an ironical suggestion.

Slereah

Just call me master

John Rennie

Strange but true

Yuzuriha Inori

@Slereah I actually call my duel master teacher by that, and my physics-mathematics-english-philosophy-black magic teacher by sensei

Balarka Sen

A lot of the teens of this chat just call everyone by everyone's names. It doesn't matter

Slereah

11:40 AM

Kids these days

No respect!

Balarka Sen

@0celo7 Lol

Yuzuriha Inori

:44099152 I see, you said it's just almost 8 at your place. There's a lot of time left in the day

Balarka Sen

summa cum laude, as they say

Eric Silva

@BalarkaSen apparently souganidis likes to be called sensei

0celo7

this guys sounds out of his mind

Loong

11:41 AM

@Slereah I have a Dr. rer. nat. – so call me a natural?

Balarka Sen

sougi is totally crazy

Eric Silva

I'm working under him this summer as I just found out lol

Balarka Sen

but also he just wants to crack a cold one open with the bois

Slereah

Just don't call me at all

Eric Silva

I'm gonna do my best to crack open a cold one w him

Balarka Sen

11:42 AM

@Slereah "I am Sam, Sam I am"

Yuzuriha Inori

@BalarkaSen Sam?

Slereah

Its me

Ol' Sam

John Rennie

17

Q: Questions for the June 14th Ask Me Anything

Hey I'm the scheduled guest for the june 14th Physics AMA and I was told to maybe make a little presentation and asks for any questions for the AMA people might have, so here it is. About me So I am Samuel Lereah, got a Master degree in particle physics from the university of Nantes. My master ...

Slereah

The famed physicist that I am

Yuzuriha Inori

I missed that chance.

0celo7

11:46 AM

@BalarkaSen my thesis also contains a category, though through an abuse of terminology

Yuzuriha Inori

There was a time when I wanted to study particle physics, before I shifted my interest to more general things

Slereah

QFT is all a lie, don't do it!

Emilio Pisanty

any mods or >25k'ers around?

Balarka Sen

@0celo7 Ok, so, with the above equivalences, I think I can prove that given a class $\alpha \in H^1(M)$, $f(\alpha) : H_1(M) \to \Bbb Z$ being the corresponding map and $g : M \to S^1$ being the space level map, for any $c \in H_1(M)$, $f(\alpha)(c) = g^{-1}(p) \pitchfork c$ where $\pitchfork$ means the intersection number

Emilio Pisanty

I can't see any analytics on the usual page physics.stackexchange.com/site-analytics/traffic-sources

0celo7

11:48 AM

@BalarkaSen uh, ok

Emilio Pisanty

@Slereah but can we call you Al?

0celo7

why not I(,) like GP

Balarka Sen

because I forgot all the math I learnt

my brain is slowly turning into mush as i prepare for these stupid admissions

I hope I can either recover it if I get into these fucking colleges or don't need to recover it at all and end up not studying math

0celo7

take the JEE and do something with your life, please

Balarka Sen

the jee is 2 hard 4 me

Yuzuriha Inori

11:51 AM

Okay guys. Thanks a lot for all the information. I have an exam on Sunday, and need to study for them. Rather than sitting around with stuff that colleges don't teach till third or fourth year

So, sayonara

John Rennie

Emilio Pisanty

@JohnRennie :-/

John Rennie

Something is broken ...

Emilio Pisanty

at least Dr Rennie sees the same as me

0celo7

@EricSilva are you excited for the conference?

we're thinking about organizing a hiking trip in the mountains

Emilio Pisanty

11:55 AM

40

Q: Traffic isn't correctly registered on Site Analytics

In the site analytics, privileged users can monitor some things like the total traffic on the site. However, it seems to be broken at the moment, all figures are almost zero. This is how it looks for Meta Stack Exchange (other sites show similar pictures):

Not just us then ...

looks like

12:17 PM

fook, apparently the most popular method for dealing with invasive hogs is poison

they vomit to death

@BalarkaSen can we discuss this again later

like tomorrow

I'm very busy with this paper rn, then class, then seminar, then scholarship thing, then dinner with visitor

and then complex analysis hw fml

Emilio Pisanty

12:44 PM

@0celo7 if it's invasive it's invasive

the natural world is a harsh place

0celo7

Sure, I'm not against killing them

but poison seems like a waste

Emilio Pisanty

it's like getting all worked up about lionfish dying

@0celo7 how so?

0celo7

I didn't take you for a republican

@EmilioPisanty feral hog meat is good meat and should not be wasted

We should have feral hog market hunting

Do to the pigs what we did to the buffalo

Emilio Pisanty

@0celo7 I'd say I'm about as far from a republican as can be, but I guess that'd put me in some sectors of the left that are rather... rabid and uncritical for my taste, I guess

Captain Bohemian

It's like today I dreamt of being a teaching assistant for experiment again! Sigh!

Emilio Pisanty

12:47 PM

@0celo7 I imagine that the fact that folks see themselves forced to poison the hogs is that there just isn't a big enough market demand for that meat

that's just the Invisible Hand of the Market telling you that your idealism doesn't square with the real world =P

0celo7

maybe, but this is a philosophy paper I'm writing, not a reality paper

Emilio Pisanty

@0celo7 you're writing a philosophy paper about feral hogs?

s. patroller

you're taking philosophy?

Emilio Pisanty

read The philosopher and the wolf

0celo7

environmental ethics class

mandatory

it's either this or arguing all sentient life is worth saving, which is definitely false

Emilio Pisanty

12:49 PM

@0celo7 define "sentient life"

0celo7

I dunno, I'm not writing that paper

It's open to interpretation

Emilio Pisanty

no kidding

s. patroller

Define: define (remember this is philosophy ;)

apologies to all the PhDs in the room

0celo7

phds dont have time to go on internet chatrooms

John Rennie

@0celo7 You need to be careful about bush meat, especially with animals that spend their time rooting through the Earth. They have a tendency to be riddled with parasites. Admittedly many of these don't infect humans, but some do. And even with the parasites that don't infect humans, so you really enjoy eating roasted parasite?

0celo7

12:55 PM

@JohnRennie grind them up and use it for fertilizer

idk, I'm brainstorming here

feral pigs are supposedly good eating

How many are there?

more than 30

:O

possibly more than 50

s. patroller

Mass slaughter.

Don't they have natural predators?

Emilio Pisanty

12:58 PM

@0celo7 that's an unrealistic assessment

0celo7

@s.patroller these are apparently spanish pigs, so no

Eric Silva

@0celo7 im excited for anything remotely mcf related

Emilio Pisanty

@s.patroller that's what "invasive species" means

Tanuj

@JohnRennie Hi ! Good afternoon :)

Eric Silva

@0celo7 people think im a communist and i think culling hogs is fine so it doesnt seem like a left-right position

s. patroller

1:01 PM

doh! @EmilioPisanty

0celo7

@EricSilva his comment about the lionfish was very GOP

Emilio Pisanty

@0celo7 how so?

0celo7

oil > lionfish

Emilio Pisanty

@0celo7 do you actually know what a lionfish is?

0celo7

no

Emilio Pisanty

1:02 PM

well, maybe look it up before you ascribe partisan aspects to opinions about them?

0celo7

ok I did know what it is

what about it

Eric Silva

i do feel like killing them with poison sounds kind of dumb

it might be that i dont care as much as other leftist kinda folks because ive lived on a farm tho so ymmv

Secret

[Doomsday ramble]

thebulletin.org/2018-doomsday-clock-statement

dw.com/en/why-syria-is-not-the-cuban-missile-crisis-of-2018/…

The biggest doomsday is there is no doomsday

0celo7

1:25 PM

@EricSilva So I take it you're >21?

Sir Cumference

Morning

bolbteppa

1:36 PM

@BalarkaSen Do the step exam, apply to Cambridge, get scholarship, become Ramanujan

0celo7

why would you want to become Ramanujan

bolbteppa

Why not

That graph theory guys reference would get you into Harvard probably as well

Eric Silva

@0celo7 no?

I'm 21

0celo7

@EricSilva whatever, >=

standard abuse

positive being nonnegative and all that

Eric Silva

Lol oh ok yes then

0celo7

1:46 PM

@EricSilva my GMT professor always says positive when she means nonnegative, so we call it "Greek positive"

Eric Silva

It's so dumb that 21 is the drinking age here

0celo7

@EricSilva I've got like 6 months left

Eric Silva

It should be like 18

0celo7

@EricSilva birth

Eric Silva

I mean I drank w family since I was a kid so I don't disagree I'm just trying to be uncontroversial

0celo7

1:59 PM

@EricSilva it's not clear to me why it's 21, no one seems to support it

it's mostly a case of "oh no it's always been this way, can't change it"

Eric Silva

Maybe left over artefact of the fact that we had prohibition idk

0celo7

the drinking age was 18 right after prohibition

it was 18 for a while

and then like 50 years ago it became 21

Eric Silva

Lol wtf that's trash

0celo7

@EricSilva actually it was 1984

coincidence??????????

Alabama was 21 in 1881

jesus

Eric Silva

it's crazy how like

this country is still this puritanical

0celo7

2:07 PM

to be fair good people don't drink alcohol. Like Donald Trump and Terry Tao

but I shouldn't have to be a good person >:(

Eric Silva

i drink occasionally but only really w food

i dont really think alcohol is all that great

0celo7

I don't like being drunk

But whiskey is objectively good

Eric Silva

i enjoy the taste of whiskey

i drink it with meals

0celo7

2:21 PM

@BalarkaSen ?

Semiclassical

@0celo7 This feels like a setup for a Facebook quiz. "Which Batman villain do you most identify with?"

0celo7

plot twist: batman

Semiclassical

@0celo7 b/c drunk driving

0celo7

there's a theory that the whole story is just the delusions of bruce

Semiclassical

I'm not being sarcastic, btw.

0celo7

2:25 PM

MADD, I know

Semiclassical

yeah

0celo7

has the law been shown to have reduced drunk driving?

because then I can see the argument

Semiclassical

They managed to get federal funding for highway stuff pegged to having the drinking age set at 21

Dunno

Eric Silva

everyone i know to have definitely driven drunk has been over 21 so rip

0celo7

define "drive drunk"

Eric Silva

2:26 PM

that's obviously anecdotal and doesnt mean anything but it is amusing if i dont think about it being sad

they drove while clearly intoxicated

0celo7

apparently it has significantly reduced drunk driving among youths

Semiclassical

some discussion of it here: one.nhtsa.gov/people/injury/research/feweryoungdrivers/…

(from a govt website so obviously it's not exactly going to be pro-alcohol consumption)

0celo7

but it's not clear there's a direct causal relationship

anyway, if I support toddlers having AR-15s I guess I should support them having whiskey

although that's not in the constitution...hmmm

Emilio Pisanty

-1

Q: How to calculate a unit vector, dot & cross-product of unit vectors and angle between two unit vectors?

Please tell me how can i calculate. I will be really thankful, if one can provide a detailed explanation.

vectors

wow

Eric Silva

idt we should base our modern laws on what's in the constitution but that's probably controversial

0celo7

2:30 PM

that's crazy talk

Semiclassical

@EmilioPisanty during my office hours yesterday for upper division E&M I had a guy who didn't know how to respond when I asked him how he'd compute the length of a vector

0celo7

the forefathers understood exactly what the world would be like in 2018

Eric Silva

clearly

Semiclassical

or how to compute the angle between two vectors using the dot product. (or, at least, only got to those once I really pushed him on it)

Emilio Pisanty

@Semiclassical did he respond like the answer in that link?

Semiclassical

2:30 PM

it was...frustrating

...lol, I hadn't actually looked and seen that answer

that's amazing

0celo7

@EmilioPisanty would you have migrated that without his abusive answer!?!?!?!

Emilio Pisanty

indeed

@0celo7 probably would have voted to migrate

0celo7

you're shitting me, right

what happened to "don't migrate crap"

Emilio Pisanty

wouldn't've changed anything given the four OT votes, but still

Eric Silva

what an answer

Emilio Pisanty

2:32 PM

@EricSilva blink and you'll miss it

Nehal Samee

Can anyone help me understand the analogy between written statement of 2nd law if thermodynamics and mathematical statement ?

0celo7

there

Eric Silva

i screenshot it too so it's ok

Emilio Pisanty

frankly, I'm surprised that it hasn't been obliterated by 'rude or abusive' flags already

0celo7

flagged as rude so it will probably be deleted

@EmilioPisanty because I upvoted, i think that makes them live longer

Emilio Pisanty

2:33 PM

@0celo7 srsly?

Eric Silva

we should have a rude.stackexchange where ppl can be rude

0celo7

maybe

@EricSilva 4chan?

Eric Silva

nvm i take it back then

it shouldnt exist

Emilio Pisanty

@NehalSamee given that there's multiple different written and mathematical statements of the second law, that's not (yet) a well-posed question as you've written it.

Nehal Samee

@EmilioPisanty Clausius said , " It is not possible to transfer heat by an automatic machine from lower to higher temperature body without the help of external energy

Emilio Pisanty

2:35 PM

Claudius

Claudius (; Latin: Tiberius Claudius Caesar Augustus Germanicus; 1 August 10 BC – 13 October 54 AD) was Roman emperor from 41 to 54. A member of the Julio-Claudian dynasty, he was the son of Drusus and Antonia Minor. He was born at Lugdunum in Gaul, the first (and until Trajan, the only) Roman Emperor to be born outside Italy. Because he was afflicted with a limp and slight deafness due to sickness at a young age, his family ostracized him and excluded him from public office until his consulship, shared with his nephew Caligula in 37. Claudius' infirmity probably saved him from the fate of many...

this guy?

0celo7

he means Clausius, Emilio

Nehal Samee

Man ,. Typing mistake ...

Emilio Pisanty

@0celo7 ah

Nehal Samee

@EmilioPisanty Again , mathematically how is entropy related to his statement ...?

0celo7

"But there also is no proof that they did not." ah the old "we don't know what really happened"

Emilio Pisanty

2:36 PM

@NehalSamee I should really refer you to a thermodynamics book

it depends on how you want to do things and what your pre-existing base of knowledge is

Nehal Samee

@EmilioPisanty The text books I have don't include or compare entropy with the statements ...

@EmilioPisanty I know that entropy is said to be disorderliness and it's maximum value states that no exchange of energy is possible ( heat death ) ... I want to locate these in the statement ...

Semiclassical

2:51 PM

@EmilioPisanty gone now, rip

Nehal Samee

3:01 PM

@JohnRennie ... There ?

John Rennie

@NehalSamee Hi

Nehal Samee

Can you come up in the problem solving room ...? Elaborate discussion of course ...

vzn

3:27 PM

in theory salon, 4 mins ago, by vzn

Machine Learning’s ‘Amazing’ Ability to Predict Chaos / Quanta

0celo7

@BernardoMeurer I'm writing a philosophy paper on pig genocide

no ZFC needed

@Semiclassical ugh, in a very boring talk

help

Slereah

4:00 PM

@0celo7 wot

0celo7

@Slereah ?

John Rennie

4:40 PM

@0celo7 pig genocide? Is that when they come to my house? :-)

(for lunch)

Balarka Sen

@0celo7 Fuh sure

@0celo7 sounds like one of the other popular theories that the whole harry potter mythology are just delusions of a lonely kid locked in his cupboard by his abusive uncle and aunt

i 100% subscribe to that theory

@bolbteppa Ramanujan was a crank

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