The h Bar

enumaris

22:00

Shouldn't the diff geo notion of torsion be the same as the "GR" notion...since GR is just basing it off diff geo (btw GR takes a torsion-free connection as an assumption, so there's no torsion in GR)

Balarka Sen

it's not available on my country either

Secret

Of course barbara probably cannot see my message because of what happens in maths chat

good night

@BalarkaSen i think it's only available in the uk

ACuriousMind

@Mithrandir24601 I can report this video isn't available in Germany, either

Mithrandir24601

:( It's such a good video

good night

22:03

brb sending open letter to bbc on behalf of the h bar

Sir Cumference

Does anyone speak GR?

enumaris

I might

good night

@SirCumference greek?

Mohammad Areeb Siddiqui

how deep is leonard susskind's theoretical minimum?

good night

does the minimum part not answer your question?

ACuriousMind

22:09

@MohammadAreebSiddiqui About 5 feet deep (more seriously, I'm not sure what exactly you want to know as an answer to that question)

Mithrandir24601

There are other parts of that episode where it has a fight with a small shark :)

0celo7

@SirCumference Some.

Mohammad Areeb Siddiqui

XDD expected that, i mean in the first few pages he talks about how this is not a big fat mechanics book and provides just enough knowledge for the subject

how much is this just enough?

good night

depends what you wanna do

Sir Cumference

@enumaris Welp, this might be asking a bit much, but would you be willing to skim this short paper a little? It suggests that the entire Universe is at least 47.8–170 billion Gpc in diameter, even though we obviously can't observe anything beyond the observable universe

Basically I'm hoping someone could explain simpler what is happening

enumaris

22:12

distances in GR are tricky

anything non-local in GR is tricky

are they talking about the co-moving distance?

0celo7

"topology scale"

Have I mentioned that I hate physicists?

Sir Cumference

It doesn't even say whether it's comoving or proper

What...?

Cows

Hi

enumaris

0celo hates us

:(

Sir Cumference

@SirCumference sigh *47.8 Gpc

Cows

22:13

I am nervous about tomorrow. I have an interview

at 2 pm, technically "a phone conversation"

good night

@0celo7 alright name one other physicist that says topology scale

i don't think that's even acceptable in physics

0celo7

then I hate the field for not deleting these guys from arXiv

Sir Cumference

@0celo7 Welp, is it wrong to trust a paper less if it's in a journal with a low IF?

Cows

@SirCumference what is IF?

Sir Cumference

@Cows Impact factor

Impact factor

The impact factor (IF) or journal impact factor (JIF) of an academic journal is a measure reflecting the yearly average number of citations to recent articles published in that journal. It is frequently used as a proxy for the relative importance of a journal within its field; journals with higher impact factors are often deemed to be more important than those with lower ones. The impact factor was devised by Eugene Garfield, the founder of the Institute for Scientific Information. Impact factors are calculated yearly starting from 1975 for journals listed in the Journal Citation Reports. ��2...

Cows

22:16

oooh

Sir Cumference

A measure of how many citations it gets a year

> journals with higher impact factors are often deemed to be more important than those with lower ones.

0celo7

@SirCumference the most prestigious journal in my field has an IF of 2

those numbers don't mean anything

Sir Cumference

@0celo7 Right.

0celo7

there's another with 2.375

maybe I'm in the wrong area

enumaris

well Nature would be like the highest IF I think

0celo7

22:19

nature is like 41

enumaris

isn't Nature like at IF of 100 or something

right

Sir Cumference

Well, the only reason I found the paper is because Wikipedia's page for the Universe lists the size as "at least 156-554 billion light years" in the infobox

Universe

The Universe is all of space and time (spacetime) and its contents, which includes planets, moons, minor planets, stars, galaxies, the contents of intergalactic space and all matter and energy. While the size of the entire Universe is still unknown, it is possible to measure the observable universe. Halpern and Tomasello calculated the observable universe using data from European Space Agency's Planck satellite, estimating it to be 90.68 billion light-years across, 0.7% smaller then previously thought. The earliest scientific models of the Universe were developed by ancient Greek and Indian...

enumaris

something much higher than like the Physical Review ones

0celo7

which is the popular one?

Phys Rev A?

ACuriousMind

@0celo7 Once you have forsaken GDP, there's no way back :)

enumaris

22:19

Phys rev A-D are on different topics

Sir Cumference

@0celo7 Does "your field" refer to a math field or physics field?

0celo7

@SirCumference Math/Math.phys

enumaris

I don't think any of them are significantly more popular than any other except insofar as whether that field is more popular than the other

0celo7

Both publish in the Journal

enumaris

Phys rev X I think is the paper for the "cool" stuff?

0celo7

22:21

I work on Riemannian geometry in a GR context so it's really hard to place me

enumaris

You mean Lorentzian geometry

:P

0celo7

no

Mithrandir24601

@enumaris But then the likes of Nature, by it's very, erm, nature, publishes a good number of e.g. biology papers, which on average, get more citations than the average physics paper

0celo7

@enumaris please give me the benefit of the doubt

I know what Lorentzian geometry is -- and while I know a lot of it, I'm not working on it

it's completely different

enumaris

why are you working in Riemannian geometry in GR? GR explicitly uses a Lorentzian metric

0celo7

22:22

spacelike hypersurfaces are Riemannian manifolds.

good night

@Mithrandir24601

guys I found it

why doesn't it load

Phase

@0celo7 srsly recommend a game

If it's relatively cheap rn i'll probs buy it

Rn idk whether to get AC BF or ME2

0celo7

heeeeeck

I'm at my pc

Phase

open to any suggestions

0celo7

what good games are there

Phase

22:26

Idk dude Im asking for recommendations : P

good night

infinite warfare

Phase

I really enjoyed Max Payne 3 though

But I have played the whole Trilogy

0celo7

I'm considering getting it

ACuriousMind

@Phase Already done with Planescape and Tyranny? :P

0celo7

@ACuriousMind why tf haven't you recommended me games

Phase

22:27

@ACuriousMind nope but this late in the evening I can't start them

Balarka Sen

games for pc?

Phase

Because they take so much time

@0celo7 RECOMMEND ME GAMES

good night

WOW GUYS DID YOU JUST IGNORE THAT OCTOPUS VID LIKE IT WASN'T EVEN INTERESTING

SHEESH

ACuriousMind

@0celo7 Hmmm?

0celo7

@ACuriousMind ?

good night

22:28

I went all that way to find it for you guys because it was blocked and you didn't even care

0celo7

you've given Phase all these games to play but nothing for me

ACuriousMind

@0celo7 But I already recommended you most of the games I liked way back!

Mohammad Areeb Siddiqui

are 2nd order DEs just a guessing game

0celo7

@ACuriousMind I don't have a good memory

@ACuriousMind @Phase what's a game we can play together?

Phase

@0celo7 borderlands 2

Bruh

We could all play

Balarka Sen

22:30

minecraft

Sir Cumference

Our TA used "GR" to stand for Galilean relativity in our notes.

...

Phase

@SirCumference you got trolled by your TA

good night

@0celo7 maplestory

Balarka Sen

I love MineCraft Awesome Parodys

ACuriousMind

@0celo7 I haven't played anything but Dota 2, BL2 or AoE 2 with others in a long time

Sir Cumference

22:31

@Phase I legitimately spent 5 mins confused (obviously assuming GR to mean general relativity) and scrolled up to see what was going on.

Phase

Wow Balarka sen said that with no provocation

What a nerd

Balarka Sen

ay, don't star that

user929304

@ACuriousMind hi, do you reckon we can discuss that measure zero question tonight, or would rather postpone to tomorrow morning? Thx again by the way for that answer.

Phase

@ACuriousMind I haven't played BL2 in a long old time

What's AoE?

0celo7

@user929304 measure theory? I can do it.

Phase

22:32

What about Diablo 3?

How expensive even is it rn

Mithrandir24601

@goodnight There's no build-up though :/

ACuriousMind

@user929304 I'm trying to find a question answered by @EmilioPisanty about precisely that issue, but I haven't had any luck so far

good night

@Mithrandir24601 well SORRY

ACuriousMind

@Phase Age of Empires

Phase

@ACuriousMind isn't that the game where DLC came out like 15 years after release

Balarka Sen

22:33

AoE is good game

I also like EE

Mithrandir24601

@goodnight tsk tsk :P

Phase

Diablo too expensive

4 me

ACuriousMind

@Phase If you wanna play some Diablo-style games, I recommend the free Path of Exile instead

Phase

:(

Hm, we could. What do you recommend @ACuriousMind ?

0celo7

Path of Exile is too time-consuming

ACuriousMind

22:33

Right, I also played PoE with my former roommate

Balarka Sen

@Phase My ears are bleeding

user929304

@0celo7 hi, it s regarding this question/answer here: physics.stackexchange.com/questions/371080/… and the comment contains the question

Balarka Sen

I literally had to pull up my headphones from my ears

Phase

@BalarkaSen so is my heart

user929304

@ACuriousMind ah alrighty

Phase

22:34

@BalarkaSen yeah he does that

0celo7

@user929304 that doesn't appear to do with measure theory at all

@Phase CS:GO?

Phase

Oh jesus

I mean, we could

0celo7

@ACuriousMind CS:GO?

Phase

I haven't played a competitive FPS in so long I'll be trash

0celo7

@Phase me neither

Phase

22:35

Inb4 we just end up playing TTT or some other strange child game

ACuriousMind

@0celo7 It's not "measure theory", just my throwaway remark that the set of separable states has zero measure within the space of states for any measure you migth conceivably choose

@0celo7 I played CS on some LAN parties way back in the day, but haven't touched it since

Mithrandir24601

@Phase if you want a free game, you want Team Fortress 2 and DOTA 2. I'll see you in a couple of decades :)

Phase

@Mithrandir24601 I've played TF2 a lil bit

Only spy though

0celo7

@ACuriousMind sigh, do I have to play DOTA with you

Phase

@0celo7 @ACuriousMind I don't think my heart is ready for another MOBA

0celo7

22:37

@ACuriousMind Huh. Is that obvious?

Phase

I can't handle screwing up in such toxic environments : P

ACuriousMind

I'm not fundamentally opposed to CS, just haven't played it in ages

Phase

@ACuriousMind none of us have

0celo7

yerp

Phase

We can all rush B and have cheeki breeki freaky times

0celo7

22:38

we'd all succ

I'm down for it

I got it in a humble bundle a while back

Phase

Me too

ACuriousMind

@0celo7 Sort of - the separable states are basically a submanifold of lower dimension

Phase

@ACuriousMind @0celo7 we gotta listen to this while we play tho

enumaris

Are you working in ADM GR?

0celo7

@ACuriousMind Can you make that precise for $L^2(R)$ and $L^2(R)$?

Phase

22:39

Playing out the subwoofers of our adidas striped ford fiestas

ACuriousMind

@0celo7 No, just for finite-dimensional systems

0celo7

@enumaris that's part of what I do

@ACuriousMind oh ok

enumaris

as an engineer?

0celo7

I'm not an engineer

enumaris

wut

Phase

22:40

anymore

ACuriousMind

@enumaris I don't think there are GR engineers

enumaris

Well maybe the guys who engineered gravity probe b

something like that

or LISA or LIGO

Balarka Sen

@Phase U S S R

0celo7

@Phase I listen to music like that unironically...

Phase

C h e e k i B r e e e e e e k i

0celo7

22:40

you found my taste in music

enumaris

@SirCumference I think by "topology scale" the authors in that paper mean something like a radius of curvature...

Phase

@0celo7 That's not bad. What's bad is when you start liking it unironically. That's how I started to like yung lean

Cows

I thought the GPS engineers studied GR too

Phase

Slavic Hard bass grows on you too though

0celo7

@enumaris Maybe, but that's stupid

@Phase I said unironically.

Phase

22:41

Yeah ik, hence I said it's not bad

I'm just too far gone

0celo7

then your sentence is nonsense

Phase

Why

0celo7

"What's bad is when you start liking it unironically."

Phase

X is fine, it's only bad when Y

0celo7

that's my situation

Phase

22:42

Yeah

OH

My brain had like

0celo7

"Yeah ik, hence I said it's not bad"

Phase

a mini stroke

enumaris

They state that they are trying to find out if the universe is closed or not, and their result is, if the universe is closed, 24Gpc is the smallest "topological scale" ...I can only gather from here that they probably mean the radius of curvature must not be <24Gpc

Phase

I read it as ironic so many times

I'm kind of concerned

Balarka Sen

I unironically like vaporwave

Phase

22:43

That's just objectively bad

enumaris

I have no idea why they call it "topology scale" that's not standard physics nomenclature afaik

Phase

jk. I dont like HOME though

0celo7

@Phase ok I'm downloading CS:GO

Phase

@BalarkaSen I like this though

Idk if it really counts but it's fringe vaporwave style at least

@0celo7 nice

0celo7

@Phase you're gonna have to tell me your name btw

enumaris

22:44

I'm too lazy to read the whole paper

tho

Phase

You have me on steam

0celo7

real name

first name

Phase

My first name is nayR

Balarka Sen

That's more like Chillwave

0celo7

@Phase ??

Phase

22:44

@BalarkaSen ik, I like it though, and it's relatively close

@0celo7 fine my names Jakob

0celo7

@ACuriousMind Ok are you getting CS:GO?

@Phase thanks

Phase

or Jake, idm

enumaris

anyways, I'm gonna go ahead and assume they mean radius of curvature and be done with it

Balarka Sen

Phase is Jake Paul

Phase

I have it installed already

0celo7

22:45

WHAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAT

Phase

@BalarkaSen my last name sounds similar to paul kinda

0celo7

@Phase I can't play rn

Phase

@0celo7 is it gonna take that long?

0celo7

no. 12MB/s

Phase

How big even is it

0celo7

22:46

I'va gotta get food and don't want to have headphone hair

6GB

Phase

fair

i mean, maybe we should do it tomorrow

It's like 11pm here. I could pull an all nighter but I'm concerned I'll mess up the good flow I've had with sleep lately

0celo7

I got 7.5 hours of sleep last night and feel great

amazing what sleep does

ACuriousMind

@0celo7 I guess I will

Phase

Good point I only need like 6 hours

and I gotta get up at like 9

0celo7

@ACuriousMind :)

you've got that GDP money now

Phase

22:48

I'll be fine for a bit

@0celo7 you got a discord or something

0celo7

I'm gonna play ACO for a bit.

Destroying Roman forts is good fun

Phase

Ah shit my dc pic has my ex in it, feels bad. Gotta change that shit pronto

Gimme your dc tho

0celo7

My ex shows up on my phone every time I go to photos

shrug

Phase

Are you also too lazy to delete photos

Because that's what I'm like

0celo7

Delete? Why would I do that?

Phase

22:49

Idk, for me it brings back bad feelings

If the relationship was good, it makes me feel sad, if it was bad it makes me feel annoyed

0celo7

I'm a psychopath, it just annoys me.

Phase

I guess I'm conditionally psychopathic

Balarka Sen

sadbois here

Phase

@0celo7 gimme your f[redacted]ng $\enclose {horizontalstrike}{money}$ discord name

0celo7

I don't have one!

Phase

22:51

I dont understand MathJax.

0celo7

You need superior intelligence for that

Phase

Oh, you guys dont voice chat? Fair

0celo7

We do

Phase

I thought I watched enough Rick and Morty :(

0celo7

I just make a new account each time

ACuriousMind

22:52

@Phase Ah, no, ocelot just doesn't understand discord :P

Balarka Sen

i have discord but i use it for memes, not gaming

0celo7

Back in my day we used teamspeak

Phase

what's to understand? You make an account, log in, and call people or join servers

0celo7

and before that we used Skype

and before that we used Xbox live

Phase

*ps party chat

if you're a real gentleman of taste

0celo7

22:53

PS was for the heck bois

Xbox is for men

Phase

Wow take that back

0celo7

you'll have to get ACM to do your dirty work

Phase

@ACuriousMind can you unclog my toilet

0celo7

ok, so is dircord a website or an app?

Phase

App, I'll give you a link gimme a sec

0celo7

22:54

downloading

Phase

here

Oh, you managed on your own, I'm impressed

0celo7

oh no

Phase

nevermind

0celo7

I have fortran homework

Phase

so no cheeki breeki?

0celo7

22:56

well I said I wouldn't be playing for a while anyway

Phase

How long we talking? Ideally I wanna head to bed around 3am

0celo7

wtf

idk like 2 hours tops

Phase

These message timers and edit timers are really annoying

Balarka Sen

ＡＢＡＮＤＯＮＥＤ

►

Phase

Fair, I'll stay up then

Balarka Sen

22:57

this is vaporwave

0celo7

they are. I wonder why they're even there. I probably have the most messages and I still get them

@BalarkaSen this stuff isn't bad

just boring

Post Malone - rockstar ft. 21 Savage

►

@Phase whats your discord name

Balarka Sen

yeah I have listened to that song

0celo7

I'm about to get banned

Balarka Sen

Post Malone is not bad

Phase

I'm not really a fan of Post Malone

0celo7

22:59

quick!

Phase

I just find it kinda inaffectual

Uhhh hang on

Balarka Sen

I like him because of the memes, not music

Phase

Jake#1078

0celo7

wtf discord says I have an account

halp

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