The h Bar

3:29 AM

0

Q: What is the source for Osmium's colour?

The majority of metals are known for appearing grey to our eyes, but the main exceptions to this are the "famous" group eleven metals, where their distinctive colours have been adequately explained before due to electron bands and the jump from d to s shells (along with the relativistic effects h...

John Rennie

4:12 AM

@Mithrandir24601 Was it good? :-)

Slereah

5:30 AM

@BalarkaSen mein sides

Secret

5:49 AM

xeeatwelve.net/articles/shattering_cube.htm

IT spins

$S(n) + pin(4) = Spin(4)$

%$n=?$%

Prufer grop:

2,3,5,7,11,13,....

yesterday, by Mithrandir24601

@JakeRose Just you wait...

21 hours ago, by John Rennie

To be fair she's very good at what she does. She's paid to entertain, and she does that well.

17 hours ago, by Secret

dies

yesterday, by Loong

@JohnRennie Taisho is a bot.

When will it be the day when the stairwell can be used to compose a message

2

ugh, starwall stupid autocorrect

The Supreme Court does have some nice stairs

Avantgarde

6:40 AM

All "supreme" buildings have nice stairs.

Abhas Kumar Sinha

hello

10th results coming from 4 hours from now, I'm dead

Novalium Company

Mornin'

John Rennie

@NovaliumCompany Morning :-)

Slereah

6:59 AM

henlo

Secret

olnhe

Abhas Kumar Sinha

@Secret what are you doing?

Secret

7:56 AM

May 22 at 12:05, by Slereah

"One first cute improvement appears in the list of authors. Aside from Aharonov, Cohen, and Elitzur – who have produced lots of garbage about "weak measurements" over the years – another stellar co-author has been added, the crackpot-in-chief Lee Smolin."

Mithrandir24601

@JohnRennie Oh yes :) It was very nice :)

Secret

Meanwhile I am curious why vzn found this ok since whoever behind this quote is, is criticising something he likes alot

The h bar has many instabilities, but nothing truimphs a Slereah Instability

2

> in h bar we discuss everything except physics!!!

In other news, still no good news from wormhole research

seems that paper that showed wormhole violate WEC basically put a nail in the coffin of wormholes

Abhas Kumar Sinha

@Secret XD

Avnish Kabaj

8:25 AM

@Secret What is a "slereah instability" ?

Secret

whenever he er... forgot to address where certainquotes came from that might be disputed

Abcd

@Secret lol

Balarka Sen

9:12 AM

@Slereah the best one from the ancient lores of Petersonian twitterism: twitter.com/jordanbpeterson/status/224723751504326658

Sid

@BalarkaSen it seems you are stalking JBP now

Balarka Sen

I'm just reading his RationalWiki article

rationalwiki.org/wiki/Jordan_Peterson

it's so flipping good

Slereah

9:34 AM

@BalarkaSen Sorry, this content is no longer available

No big surprise

Damn soft sciences

Balarka Sen

I am afraid he does

Abhas Kumar Sinha

hello

I got my results for class 10th

I scored 85%

noice

thanks

very noice

9:41 AM

congrats

Avantgarde

I think I wrote my exams that time with a fountain pen

Abhas Kumar Sinha

thanks

I wrote with pencil and pen

Avantgarde

Really liked foundatin pens

Slereah

I just use crayons

Avantgarde

submit articles to JHEP written with crayon

Secret

9:43 AM

One first cute improvement appears in the list of authors:

JPB who publish lunatics

Abhas Kumar Sinha

XD

Avantgarde

What did Jordan do now?

Abhas Kumar Sinha

I write with chalk and blackboard

Avantgarde

I write with a blackboard too

Secret

Aside from Jordan, Perterson, and Jaywalking

– who have produced lots of garbage about "semen"

Abhas Kumar Sinha

9:44 AM

XD

Secret

over the years –

Abhas Kumar Sinha

@secret I got my results, I scored 85%

Secret

another stellar co-author has been added, the lunatic-in-chief SPJB"

@AbhasKumarSinha nice

Avantgarde

Are people fighting again because of Jordan?

Secret

THe helium balloon will be trapped in a time loop until the Slereah Instability is resolved

Likewise for Jordan Whatever Peterson

There can be no piece in h bar times pi

Abhas Kumar Sinha

9:46 AM

@secret Thanks

Secret

It's ashame Avantgarde get pulled into this mess, but we will get the timing better next time

Sincerely, The Labs

Abhas Kumar Sinha

sperm and semen are different

Avantgarde

I didn't even know there was a mess.

Secret

oh yeah, as every biological book will tell you, the latter is a mixture of different fluids and male sex hormones

Abhas Kumar Sinha

Semen is released from Prostate Glands and Sperm with Testosterone Hormone

Anurag Baundwal

9:49 AM

Biology in a physics chat room. Oh well! xD

Secret

yesterday, by user187604

@JohnRennie @Blue in h bar we discuss everything except physics!!!

that's style

Lolz

XD

Another flagfest?

9:52 AM

what is flagged this time?

Abhas Kumar Sinha

flag is flagged

Captain Bohemian

I considered you are talking about Jordan algebra. I recently see the term Jordan algebra often, wondering what it is.

Martin Sleziak

I see that my message about flagfest was flagged. Ultimate irony :-)

4

Secret

uh... I am not that familiar with Jordan algebra, thus I cannot really have talked about it

Captain Bohemian

I have looked up Jordan algebra in Wikipedia but have not clarified myself about it. Too many math terms I don't know. For example, I don't know what "unital" in "unital associative algebras" means.

Dawood ibn Kareem

9:59 AM

Unital means there's a multiplicative identity.

Avantgarde

Jordan Peterson algebra?

Secret

Jordan algebra

In abstract algebra, a Jordan algebra is an nonassociative algebra over a field whose multiplication satisfies the following axioms: x y = y x {\displaystyle xy=yx} (commutative law) ( x y ) ( x x ) = x ( y ( x x ) ) {\displaystyle (xy)(xx)=x(y(xx))} (Jordan identity). The product of two elements x and y in a Jordan algebra is also denoted x ∘ y, particularly...

No, it has nothing to do with jordan peterson

It is one of the common nonassociative algebras besides lie algebra

Avantgarde

I was joking.

Captain Bohemian

@DawoodibnKareem then I probably know what unital means. thank you very much. Wikipedia uses the term "a multiplicative unit", which confused me much.

Abhas Kumar Sinha

10:16 AM

allo

ello

ello

no more

why?

today I waked from dream with a vivid classroom full of classmates, some of them are my senior high school classmates.

Abhas Kumar Sinha

10:22 AM

XD

I too get some dreams like that

Avantgarde

What made it so "vivid"?

Abhas Kumar Sinha

vivid word

Avantgarde

Why did you wake up? Was it not a good dream?

Captain Bohemian

@Avantgarde because the classroom is full of classmates.

Abhas Kumar Sinha

good

Avantgarde

10:23 AM

Classrooms are supposed to be full of classmates.

3

Captain Bohemian

I used to be in a research institute which is so desolate most of time; I felt it like a desert.

Avantgarde

Were you the only researcher there?

Abhas Kumar Sinha

desert

dessert

Captain Bohemian

@Avantgarde not that way, but not many colleagues. In the beginning, my boss was my only colleague; afterwards, he employed two other research assistants but they were not congenial to me.

Avantgarde

@CaptainBohemian That's not a very healthy situation.

Captain Bohemian

10:33 AM

@Avantgarde indeed. I shared an office with a postdoctor, who also lacked colleagues and seemed to feel very lonely so every day called someone to talk with his conversation disturbing me.

Avantgarde

@CaptainBohemian I can imagine

Captain Bohemian

that kind of desperate loneliness never occurred when I was in school, which is always a vivid campus on school days.

Avantgarde

Yeah that's right.

Hopefully you don't have a similar situation anymore

skull

Captain Bohemian

@Avantgarde I have left that institute, and afterwards my boss also left that institute because of social relation--most people in that institute seemed not to be congenial to him.

well, I would say I really hate frequent solitude. I prefer to be surrounded by congenial people most of time.

Secret

10:44 AM

For me it depends, I can handle some solitude if I am focused on some task or hobby, but I cannot be solitary for extended periods of time

Captain Bohemian

in my dreamland, I am always surrounded with people, even people I don't know in reality.

Secret

As for me, my dreams can be full of people or have no people at all

Captain Bohemian

I don't have many hobbies, I guess, because I seem to do everything seriously.

Anonymous

@CaptainBohemian Interestingly, I feel lonlier when I'm surrounded by more people (N>3). I find it quite hard to blend into the crowd. However, when there are just one or two people in the room I seem to be able to converse more easily.

Anonymous

There must be a term for that...

Secret

10:49 AM

introvert? but that sounds too broad

Anonymous

Sort of I guess. Funny how my online identity is pretty much the exact opposite of my real life identity :P

Anonymous

Everything changes when you don't hear people's voices or see their faces

Captain Bohemian

@Blue I seldom feel lonely when being surrounded with congenial people. I would only feel lonely when I am completely alone.

Anonymous

Hmm, but it's quite rare to have a lot of "congenial people" around you

Captain Bohemian

even fighting with my enemy makes me less lonely than being completely alone.

Secret

10:53 AM

My social dynamics follows the following pattern:

Statistics:
Pairs: 8
Trios: 8
Quads: 3
Quintet: 4
Sextets: 2
Medium scale (6 < x < 10): 1 (x = 8) 1 (x = 7)
Large scale (> 10): 6

which means I am most stable when in pairs and trios

Anonymous

@CaptainBohemian That's probably because your enemies are human. If it was a giant alien intending to cut you into parts and testing you, you would feel differently :P

Secret

I felt more lonely when being with people who are indifferent

Captain Bohemian

@Blue actually my fighting just means quarrel, which I have encountered since adulthood. I have fighted with boys when in primary school.

Secret

and sometimes that loneliness will be strong enough to make their day bad because of my frustration

I, however like being with people who are congenial, including those who have opposite worldview to mine as long they respect

Anonymous

@Secret Yes, that is true

Anonymous

11:00 AM

Apparently there's some sort of mental satisfaction gained by appearing tough and indifferent

Secret

and that indifference is a complete waste of efficiency

I wish I could just erase these people from existence but the law forbid me to do so

Anonymous

Tbh, I would not associate a static behavioural characteristic to such people. Everyone keeps changing with time. I don't think I am the same 5 years into the past or the future.

Secret

well that's true

Anonymous

11:22 AM

@Secret I tried a little experiment once. I concluded that the initial days of your interaction with a group matters a lot. The saying "first impression is last impression" is very true in social settings. Say in the first 3 days with a group you behave like a loner: people will mentally label you as a loner and after that even if you try it gets quite difficult to change that notion, both for you and them. People have a strong preference for "homeostasis".

Anonymous

On the other hand if you're (say) feisty in the initial days, they'll label you as that for the rest of the time. So, perhaps, some of the people who appear indifferent to you, are not indifferent by "free will". In fact it might be possible that they're trying to get out of that and be more cheerful and congenial, but guilt is holding them back :)

skull

11:49 AM

\o @MartinSleziak & @Jim

Martin Sleziak

He's drowning again!

skull

:(

Avantgarde

12:33 PM

:(

skull

>8(

Jim

@skull what's up?

skull

Chillin, pal @Jim how are you?

Jim

pretty good. Not doin too much, just at waork

Slereah

1:51 PM

Secret

Wheeeeeeeeeeeeeeel

Secret

2:32 PM

In other news...

Still none of my calculations are working

Akash. B

2:54 PM

hi

enumaris

3:53 PM

what's a physics chat session

John Rennie

@enumaris in the early days of the chat room it was very quiet, so we organised a regular chat session for an hour every two weeks to try and draw people in. We'd have a subject to discuss.

enumaris

hmmm

what's the topic today?

John Rennie

These days the room is busy enough that we don't bother, but we never got around to cancelling the scheduled event.

Just ignore the notification.

enumaris

I see

lol

John Rennie

Unless of course there is some subject that you desperately want to talk about :-)

enumaris

3:57 PM

not really lol

vzn

@enumaris how about cosmic censorshp :)

enumaris

I don't know much about it

vzn

@enumaris ah, beginners mind maybe, you said you read wald and thats quite significant.

Secret

These days I am so busy to meddle with either quantum or GR

vzn

@Secret quantum chemistry right?

enumaris

4:03 PM

I read Wald a while back

Secret

yup, and you will understand how messy this new batch of calculation is when you see this table:

enumaris

and I can't really recall what his comments on cosmic censorship were...

Secret

Red colours = fail, green colours = success, white, black = unable to read file

I just grab some advice from Periodic Table chat and will try higher spin states next

vzn

@enumaris the field has probably evolved substantially since he surveyed it, but it seemed to be helpful earlierish survey

enumaris

Mostly I recall reading about very technical definitions for the global structure of spacetimes and the singularity theorems of Penrose and Hawking

but I can't even reproduce those arguments anymore lol

vzn

4:05 PM

@enumaris skimmed it (after you cited it, thx), he had maybe ~1 dozen pgs & related material etc

Secret

However, despite my busin-ness, I stil managed to read two interesting quanutm:

A new boost to the presence of quanutm coherence in photosynthesis

Deuterium binding energy calculations with quantum cloud computing

enumaris

quantum cloud computing...

sounds like a jumbo of buzz words

lol

jumble?

vzn

@Secret QM + biology! interested in that field & have collected misc links on it over the yrs, emerging, even... paradigm shift :)

enumaris

jumble

Lozansky

Who needs that when you have Weizsäcker?

Secret

4:08 PM

quantum biology was previously being driven back due to many conflicting reports and papers, but it is good that a nature article suggested the effect is actually there

vzn

@enumaris cmon dude thats what physics is these days :P ("jumbo jumble"!)

@Lozansky ?

Lozansky

@vzn en.wikipedia.org/wiki/Semi-empirical_mass_formula

vzn

@Lozansky ok, but what were you referring to ("who needs that?"). are you familiar with some of that? hmmm ↓

> The theory is based on the liquid drop model proposed by George Gamow, which can account for most of the terms in the formula and gives rough estimates for the values of the coefficients.

Lozansky

It was in jest as a reply to "quantum cloud computing"

It can for example be used to approximate binding energies for molecules

vzn

@Lozansky looks like an interesting theory reminds me of... fluid dynamics/ pilot wave hydrodynamics, solitons :)

> The liquid drop model in nuclear physics treats the nucleus as a drop of incompressible nuclear fluid of very high density. It was first proposed by George Gamow and then developed by Niels Bohr and John Archibald Wheeler.

also reminds me of this ran across recently "black hole electron" en.wikipedia.org/wiki/Black_hole_electron

enumaris

4:23 PM

nuclear physics...mmm

vzn

@enumaris so hows the ML going? have you heard of auto ML? am interested/ looking into that lately

enumaris

4:36 PM

I've been learning reinforcement learning lately

I've heard of automl but I don't know much about it

vzn

@enumaris its relatively new tech, google has an early cloud version this year but its for vision only right now

enumaris

I find reinforcement learning to be much closer to what I would consider "A.I." than the supervised and unsupervised learning I've encountered thus far

vzn

hmmm, googling around, cutting edge research on gamow liquid drop model arxiv.org/abs/1708.04292

> The liquid drop model (3) was introduced to describe nuclear structure. In fact it appears in various other contexts (mathematical and physical) to describe systems with competition between short- and long-range effects on many scales, from the nuclear to nanoscale (in condensed matter systems), to centimeter scale (for fluids and autocatalytic reaction-diffusion systems,) and even on cosmological scales. (p6)

@enumaris awesome stuff, RL beat worlds best Go player, its semirevolutionary, think it will advance further... saw the deepmind Go documentary a few mos ago, highly recommend it, lively/ fascinating

enumaris

yeah...

it's a combination of traditional RL techniques and deep learning that did the trick

Mithrandir24601

@Lozansky all I can say is... Vive la Quantum!

4

vzn

4:47 PM

@Mithrandir24601 congrats on the new site & your election. hows the mod'ing going? any highlights from your mtgs so far? any (aptly named!) strangeworks news?

Lozansky

@Mithrandir24601 You should randomly tunnel mesages from other chat rooms into that one :P

vzn

@enumaris hypothesize RL can be viewed as a more general scheme/ theory of "(systematically) exploring the environment" to potentially highly substantial effect vzn1.wordpress.com/2018/01/04/…

enumaris

I'm gonna slowly write a small RL library for myself

streamline my use of RL algorithms

heh

vzn

+ ML increasingly showing up a lot more in physics with innovative/ substantial/ promising uses/ results, am gonna write up/ blog a set of links sooner or later... yet another paradigm shift™

ACuriousMind

@JohnRennie Well, in theory we keep meaning to revise the idea of what we do in these sessions, but we never really get around to that, either ;)

Mithrandir24601

4:58 PM

@Lozansky I could... :P

ACuriousMind

@Mithrandir24601 Writing a bot that moves around chat messages at random? That's one way to lose the diamond, I guess... :P

John Rennie

@ACuriousMind there's a lot to be said for constructive procrastination. It's a surprisingly effective management technique :-)

vzn

lol on other hand a bot might liven up this wkly chat session o_O :P

Mithrandir24601

@vzn thanks! :) It's been reasonable so far - nothing's gone majority wrong yet. We'd like more people, but hopefully that will come with time

vzn

@Mithrandir24601 IBM ~50 qubits + Google ~72 going live sooner or later should help some! really hope to see some major results in the area soon, but it seems very alive... intel making some noises also... :)

Mithrandir24601

5:02 PM

@ACuriousMind Yeah... that's not a good idea :P But it's not like there hasn't been conversations in here about quantum computing. Not that I'd do such a thing :P

vzn

@Mithrandir24601 there have been some very lively conversations over the years in here on QC, have enjoyed some myself (notably with DS), but maybe you guys will specialize in that now (amazingly, not everyone in physics/ elsewhere is a fan of QC...)

Secret

QC will become relevant to us chemists when it reaches at least 500 qubits

Mithrandir24601

@vzn yeah, I hope so, once we get some more chat users

Secret

but already in the field of diatomics and nuclear physics it is promising

vzn

@Mithrandir24601 it seems to be extremely challenging to build up chat rooms/ activity on SE, spking from long experience. even harder than building up main sites (which is already very challenging.) have really long wished SE/ mgt could be of more assistance in the area & that there were other ways/ methods etc

Mithrandir24601

5:18 PM

@vzn we've got a few users but not much in the way of conversations :/

vzn

@Mithrandir24601 if your chat room doesnt need pings by the mods every 2wks to stay alive youre doing better than even some major/ long est sites such as MathOverflow!

Mithrandir24601

@vzn huh. We're doing better than that at least...

bolbteppa

@Slereah amazon.com/…

I think this is one of those group books you can trust

Slereah

I'll give it a look

vzn

5:35 PM

@Mithrandir24601 idea: someone from your site could be a speaker for a physics session and mention your Quantum Computing site/ chat etc, keep it in mind, these seem to work out better in the summer (maybe wrt peoples schedules... ps thx again re your participation) :) physics.meta.stackexchange.com/questions/7783/…

bolbteppa

6:20 PM

@0celo7 poor Roseanne

@Slereah review projecteuclid.org/download/pdf_1/euclid.bams/1183550986

Having skimmed through it, it looks really complete, maybe too complete

bolbteppa

6:59 PM

Hmm, doesn't construct the exceptionals :\

Slereah

only string theorists and that guy Motl hates care about the exceptional groups

Semiclassical

Lisi

bolbteppa

motls.blogspot.com/2007/11/exceptionally-simple-theory-of.html

:D

that's the one

8:45 PM

9:17 PM

Not happy with it anymore, back to these notes wuzhengyao.oschina.io/homepage/Lie.pdf with Humphreys :\

Sir Cumference

11:08 PM

Quick question. If $\int_{a}^{b} f(x) dx = F(b)-F(a)$ for $F'(x)=f(x)$, does that necessarily imply $f$ is continuous?

ACuriousMind

@SirCumference Forget about the integral, any derivative is continuous.

Sir Cumference

@ACuriousMind There seem to be examples of piecewise functions with discontinuous derivatives

Most people cite

$$
f(x) = \begin{cases}
x^2 \sin(1/x) &\mbox{if } x \neq 0 \\
0 & \mbox{if } x=0.
\end{cases}
$$

ACuriousMind

Ah, I forgot about the difference between differentiable and continuously differentiable because it never matters, you'll always just add the assumption that the function is continously differentiable if you need it :P

But if you know that counterexample, what is your question?

Sir Cumference

Is the fundamental theorem of calculus ever useable for discontinuous functions?

ACuriousMind

@SirCumference I suspect that the fact that what Wiki calls the "second part" of the fundamental theory does not require continuity implies the answer to your question is "no".

enumaris

11:31 PM

weez

I learned long ago to never bother with worrying about smoothness

just assume everything is smooth

or just assume everything is analytic

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