The h Bar

user434058

05:04

@peterh-ReinstateMonica Thanks :)

Ajay Mohan

06:09

Hey guys, quick question.
A few days back, I asked a question on Math.SE with the goal of getting a slight hint that would let me solve a mathematical calculation I have been assigned to do by my thesis advisor. This calculation will be published in a peer-reviewed paper that I'm writing with my thesis advisor.
But, instead, a user gave the full solution as the answer. Not his mistake, as the full solution was just a few steps away from the hint.

My question is: How do I cite the user's answer on Math.SE on my paper? Is it a common practice?

Guru Vishnu

@AjayMohan: I don't know the full details. But there's a button named cite next to share below each post on some SE sites like Maths and Physics. For example see the following image:

Ajay Mohan

One of the biggest drawback of citing SE answers (apart from the authenticity of SE answers): Since answers in SE can be modified over time, I don't think it would provide an accurate reference.

Yes, I saw that option. But, how can one get rid of the above drawback?

Also, most of the time, the names of SE users are random. The user who answered my question is "DinosaurEgg"

I would like to cite their answer using their real name if possible.

Asking for their personal details (such as email-ID) on comments is forbidden according to SE rules.

Emilio Pisanty

07:26

@AjayMohan this is avoidable for Web resources. Just timestamp your citation appropriately, and if the answer changes then the revision history is public.

There's multiple references to MathOverflow from the arXiv and published literature

skullpatrol

@EmilioPisanty I meant this link ;)

Emilio Pisanty

Look them up to get an idea of how to approach the details

Slereah

morning

@EmilioPisanty Much harder is to use that theorem that 4chan proved

Physics Meta

07:44

0

Q: Where can I find a statement of physics S.E policy on self citation?

A question was asked which I had previously researched and written up in my book. As the passage in my book constitutes as good an answer as I am capable of giving, I reused it. As it was my own text, I do not regard it as plagiarism (the rules for "self-plagiarism" which apply to research journa...

Shaurya Goyal

09:30

hi my question was closed as someone answered in the comments. but i hadnt seen it and my query still isnt resolved. can someone please help me out by either answering it or atleast opening the question again

Guru Vishnu

@ShauryaGoyal Hi. The reason your question was closed was not because of the answers in the comments but because of your question which seems to be a homework type problem which is not encouraged on the main site. You might find the links in the close banner on top your question to be informative. It is from where I learnt what questions are on topic on this site.

user434058

09:45

@ShauryaGoyal You can always try asking such questions either here or in the other room, Problem Solving Strategies. As for your latest question, you have to assume that the current at t=0 is the current which will be used to charge the capacitor. You can find the current through the capacitor at t=0 by assuming the capacitor to be a wire. Find the current and find the final charge and there you go!

user434058

You can find the final charge by checking the potential of the capacitor in the steady state i.e. at t=infinity.

Slereah

10:19

philsci-archive.pitt.edu/2673/1/earmanfraserfinalrevd.pdf

interesting paper

Emilio Pisanty

10:37

Congratulations to @heather for her election to the Moderator Council!

way to go, girl =)

user434058

Is there any chance that this answer might be right, and I am just too dumb to conclude that it's blatantly wrong and useless?

user434058

0

A: Angular Displacement in case of $n$ Revolutions Around a Reference Point

Angular velocity is not a vector quantity it's kind of a tensor quantity I mean angular velocity is angular distance divided by time. The significance of angular displacement is it describes the actual angle (that's not the correct word for it) like it makes trigonometric calculations easy.

Yuvraj Singh...

@EmilioPisanty pse?

Slereah

Duffield's ban ends in 3 months

Elect me and I will destroy him

user434058

Vote for @Slereah!!

bolbteppa

10:44

Only if you end Ron's ban as part of your platform

Yuvraj Singh...

Consider me too, I am going to vote

Slereah

I say we make Ron, Motl and Duffield fight

Whoever comes out is unbanned

Three men enter, one leaves

bolbteppa

One of them is not banned

user434058

@Slereah But Motl isn't banned at all...

Slereah

I'll ban him first then

Emilio Pisanty

10:45

@YuvrajSingh... say again?

user434058

@Slereah lol

Yuvraj Singh...

@EmilioPisanty is it about physics moderator?

user434058

@YuvrajSingh... @heather is a mod at Quantum Computing SE.

user434058

heather ♦, Caves beneath Helms Deep

2.9k 1 11 43

physical-qubit physical-realization quantum-gate classical-computing experiment algorithm architecture

Slereah

I have been building a time machine these past few years to make sure Duffield is never born

Mostly it's a giant bong filled with hallucinogens

user434058

10:47

85

Q: Introducing the Moderator Council - and its first, Pro-tempore, representatives

When I was a moderator, I often referred to moderation on Stack Exchange as being a janitor: cleaning up spam, deleting non-answers, removing rudeness, and eradicating a seemingly-endless stream of comments were the primary day-in-the-life tasks for me. While this term may cover what Jeff expecte...

discussion featured moderators announcements moderator-council

user434058

Context ☝️

bolbteppa

...what this site needs is more moderation...

Slereah

I'm not sure moderation will help much rly

Most offenders on PSE are first time users

bolbteppa

I for one am not happy when someone asks a question that does not fit into the box and hope more can be done to stop people getting answers to their questions

Slereah

who will never reoffend again because they only use the site once

user434058

10:50

We need huge banners

bolbteppa

That's why the Slereah candidacy is so vital in these dark times

user434058

Stating all the rules straight to their face

Slereah

3

user434058

@bolbteppa You messed up my fake Haiku :P

bolbteppa

Although the idea of FakeMod becoming a RealFakeMod is enticing too

user434058

10:53

@bolbteppa Won't that make me more fake? :P

user434058

I think we should make QMechanic an ultra-mod.

abhas_RewCie

14:14

@FakeMod Now, I prefer smaller profile things...

Emilio Pisanty

14:35

yo @JohnRennie

> To whom is the Moderator Council answerable to?

does ↑ have too many "to"s?

John Rennie

Yes, just use:

> To whom is the Moderator Council answerable?

Slereah

to whomst*

Emilio Pisanty

ah, got it =)

John Rennie

whomst ???

Apparently the "st" is an excrescent suffix. Charming.

Yuvraj Singh...

15:10

@JohnRennie can you help me in understanding what going in chat?

Slereah

That paper offers a nice intuitive example of why Haag's theorem

it is nice

John Rennie

@YuvrajSingh... yes, what's the problem?

Yuvraj Singh...

@JohnRennie in h Bar?

John Rennie

What bit of the chat did you want me to help you understand?

Yuvraj Singh...

@JohnRennie like moderator council?

John Rennie

15:15

@YuvrajSingh... I don't know anything about it I'm afraid. It's a new thing that the people who run the SE are setting up.

Yuvraj Singh...

@JohnRennie no issue:-)

abhas_RewCie

15:29

@YuvrajSingh... hello bhai :-)

Yuvraj Singh...

Hi:-)

abhas_RewCie

@YuvrajSingh... sup buddy?

Yuvraj Singh...

@abhas_RewCie bored

abhas_RewCie

@YuvrajSingh... why?

ACuriousMind

@EmilioPisanty ...did you write it as the wrong version in your meta post on purpose, then? :P

Yuvraj Singh...

15:32

@abhas_RewCie I have finished my work, I usually do some coding, and then some

Lecture.

abhas_RewCie

k.....

Yuvraj Singh...

That's it

abhas_RewCie

:-)

)))))))))))))))

Yuvraj Singh...

@abhas_RewCie wbu?

abhas_RewCie

@YuvrajSingh... Searching papers which discusses implementation of an AGI...

XD

Yuvraj Singh...

15:36

Lol lol

abhas_RewCie

@YuvrajSingh... Start with an adult and let me teach it stuff

Yuvraj Singh...

@abhas_RewCie do you spend you whole day in this?

abhas_RewCie

@YuvrajSingh... Yes, I've been reading Laurent Orseau's paper since 5 with no luck, till few hours before, I understood what his notations meant!

@YuvrajSingh... Here's a summary, for an AI to code itself : twitter.com/abhas_rewcie/status/1253977160278323200?s=20

@YuvrajSingh... I didn't knew that there were AGI projects before... (some of them funded by US Government :Hmmmm... ) like GPS, CyC. SOAR, ACT-R, NARS... wagera wagera, all of them have different implementations for an AGI to solve problems.

It's a total pain to read about them individually, they conceal information from general public.

Yuvraj Singh...

@abhas_RewCie enjoy

My mostly focus is on gr

abhas_RewCie

:-)))))))))))

@YuvrajSingh... Me too.

Yuvraj Singh...

15:46

Although it consist of very hard math

abhas_RewCie

@YuvrajSingh... ezy, just fo

just einsteinian notations make things hard

Yuvraj Singh...

Come to physics.

@abhas_RewCie

user434058

@abhas_RewCie Hmmm...

abhas_RewCie

@YuvrajSingh... start from here - twitter.com/abhas_rewcie/status/1247823619167641603?s=20

As usual, I drop Summation like Einstein did.

Yuvraj Singh...

@abhas_RewCie :-)

abhas_RewCie

15:51

:-)

Yuvraj Singh...

@abhas_RewCie send me some more papers I will share them with my friends

abhas_RewCie

@YuvrajSingh... I've written only 2 :P

Yuvraj Singh...

:-P

abhas_RewCie

:-PPPP

user434058

Is there anything which makes this question flag-worthy/close-worthy?

JingleBells

16:02

I have a stream of characters of a book. I have a piece of code that when the word doesn't fit at the remaining line space, it puts it on the next line. It all works but my issue comes when I try to add page functionality (switching pages). Since words that don't fit on a line, go to the next line and push other words, if I'm on page 82, I have to process every single page until 82 so I get accurate content of page 82. The code works but it starts to lag when I get further in the book.

How would I go about fixing this problem? (I know this is not StackOverflow but there are many high IQs here)

ACuriousMind

You've discovered why TeX compiles once instead of interpreting the source on-the-fly :P

JingleBells

I need a solution :P Kindles do it somehow

ACuriousMind

I'm willing to bet they just set the entire book in the chosen font on load/font change.

JingleBells

@ACuriousMind That's something that I can do. I wanted to make it so that the user can switch fonts of the book whenever he/she likes but I guess no

The Kindle does some weird text skipping and moving from time to time no idea why

ACuriousMind

Your algorithm for the setting is probably just inefficient compared to what the e-readers use

JingleBells

16:12

"inefficient" is not really helpful :P

My other option is to remove the piece of code that puts words on new lines when they don't fit. It would ruin the reading experience, not sure what to do

ACuriousMind

Since I don't know your algorithm I can't say anything more specific! (And I'm not in the mood to performance-tune other people's code right now anyway :P)

JingleBells

:( me sad

ACuriousMind

But in general "jumping to page 82" is not really a meaningful thing to do in an ebook with variable font

It's more like jumping to a location, e.g. the 2435th word

And to typeset around this location, you don't need to typeset everything that came before it - just let the typesetting run in both directions around the location until the page is full

JingleBells

yes but if I go to the previous page or next page, there will be bugs

ACuriousMind

I don't see why

you know where you stopped on the page, just continue to typeset from there when the user goes to next/previous

The only thing that might look strange are things like chapter beginnings/ends with forced new-pages, but these might look strange with variable font set from "the beginning" anyway

JingleBells

16:21

How do I know which character is the beginning of the page 82 when everything before page 82 is not typesetted

nvm, it's not about pages, I get it

pff my brain's gonna explode

ACuriousMind

As I said, "page 82" is not a meaningful location in a text with no fixed font. No user tells you to jump to "page 82". They tell you to jump to "beginning of chapter 5" or something.

JingleBells

I'll ask in StackOverflow. Thanks for the help :-----)

Loong

16:34

@FakeMod Yeah, and pigs can fly.

Rudi_Birnbaum

Hi there, I have strange question, its about taking the log of the electron density and a bit hard to express.

Anyone interested?

my problem is about the units. As far as I can see taking the log from a quantity with non-trivial physical units, hardly makes sense, right?

Or maybe I am mistaken here?

user434058

@Loong I am sorry, I don't understand...

user434058

17:08

@Loong Oh well, I just linked that so that Yuvraj Singh... could get a hold of what was going on. Though it's better than not knowing anything. And anyways, this is the only source of info we have right now, I suppose. :)

Pole_Star

17:34

yeah

user434058

Yo

ACuriousMind

@Pole_Star You've been warned to stop spamming this video before.

Slereah

17:50

what if

I am a category

I am made of objects

Slereah

18:18

The string s-matrix according to nlab :

$$ S_{\psi^1_{in}, \cdots, \psi^{n_{in}}_{in}, \psi^1_{out}, \cdots, \psi^{n_{out}}_{out}} \;=\; \underset{g \in \mathbb{N}}{\sum} \lambda^g \underset{ {moduli \; space \; of} \atop {{(n_{in},n_{out}) punctured} \atop {{super\; Riemann \; surfaces} \atop {{\Sigma^{n_{in}, n_{out}}_g} \atop {of\; genus\; g}}}} }{ \int } \left( SCFT \; Correlator \; over \; \Sigma \; of \; states\; {\psi^1_{in}, \cdots, \psi^{n_{in}}_{in}, \psi^1_{out}, \cdots, \psi^{n_{out}}_{out}} \right) $$

They are wordy sods

bolbteppa

Quantum gravity: $S = \sum \int e^{\mathrm{EH \ Action \ + QM \ action + matter \ + magic}} dV$

Slereah

My theory of physics is just a big array of experimental results

Every experiment can allow you to find one more item

It's not very predictive but boy is it accurate

for all its flaws, nlab does explain (somewhat) what string field theory is

Apparently "fields" belong to the BRST complex!

"What is called the “BRST complex” in the physics literature is the qDGCA which is the Chevalley-Eilenberg algebra of the $L_\infty$-algebroid which is the differential version in Lie theory of the $\infty$-groupoid"

oh no

$$ S : \Psi = \frac{1}{2}\langle \Psi , d_{BRST} \Psi \rangle + \frac{1}{3} \langle \Psi, [\Psi, \Psi]_2\rangle + \cdots \,. $$

user434058

18:34

iamscrewed,ohboi -_- smh

user434058

Damnit!!!

JingleBells

19:03

stackoverflow.com/questions/61485248/… anyone :P?

JingleBells

19:19

@ACuriousMind Regarding my issue earlier, is there any way that I can do it without preprocessing the whole book for a specific font? My only solution right now would be to make it so that each book has it's corresponding font that it's processed for. Is there a better way to do it where I can switch fonts on the go or it's better to preprocess for a specific font?

ACuriousMind

3 hours ago, by ACuriousMind

And to typeset around this location, you don't need to typeset everything that came before it - just let the typesetting run in both directions around the location until the page is full

JingleBells

Sorry, I'm not familiar with how that works. It seems to be that there will be some implications and bugs if you start going to the beginning for example. Would it be possible to have pages with numbers?

Is this a legit method?

@ACuriousMind Can I read more about this method somewhere?

ACuriousMind

19:40

No idea, I just thought that should work, it's not as if I'm an expert on rendering text :P

But I don't really see what sort of "bugs" you expect

You don't really need "page numbers" in a document with variable font

As I said, locations should be more like "Xth word" rather than "Xth page".

If you have an algorithm that fits words on a page, just start the page with the word that identifies the location and fill the page.

When the user goes to the previous page, you need an algorithm that fits the words "in reverse" starting with the last word but that shouldn't be too hard, either.

JingleBells

How Kindles do it? I'm not sure you can change the font there, but I think you can change the font size (which is arguably the same) and you still have page numbers and you can go to a specific page...

ACuriousMind

Would you really notice if it did it like this and just guessed the page number? :P

JingleBells

Hmm. I'd love to give it a try but I'll suffer trying to program it. I don't completely understand how it works. :\

When you say the Xth word, I still have to go through all the previous words, won't that create lag when going further in the book?

ACuriousMind

Well, you need to store the book in a format that's not just a giant string to begin with for any access method to work that's less than linear complexity

JingleBells

I'm not storing the book, I'm reading it from an SD card and characters are read one by one.

ACuriousMind

19:49

Look at e.g. the epub format for ebooks to get an idea how a file format for a book can be structured

@JingleBells Well, then you can't access anything later in the stream without going through everything before it :P

But that's nothing to do with how you render the text, you just have a format that doesn't allow what you want

JingleBells

@ACuriousMind Well sh*t

Actually

arduino.cc/en/Reference/FileSeek

^ starts reading characters after the Xth character

ACuriousMind

Uh. If you have control over the storage to the degree that you can do an fseek on it then "characters are read one by one" is not fixed, it's just something you chose to do :P

JingleBells

@ACuriousMind I guess so

The display I want to show the text on is rather small so I have no use of complicated epub and pdf formats, just plain text would do I believe, for now

@ACuriousMind Knowing that, is there a better way to do it? The solution that comes to mind would be to preprocess the book beforehand for the specific font and then be able to read the book only with the chosen font where I use fseek... will that do?

From a user's point of view, I don't think there's anything bad about choosing a font for your book beforehand.

JingleBells

20:17

@ACuriousMind Thank you for helping me out. I will go with my method for now as I'm more familiar with how to do it and it's not a big deal that the user would have to select a font for his book beforehand. I also think it would be good if the person can enter a page number and go to it. Nevertheless, it's never too late to change the method in the future.

Charlie

22:17

Am I right in saying that the set of $1\times 1$ complex unitary matrices is the set of complex numbers of modulus $1$?

And that them having modulus =1 follows from them being "unitary"?

Nikita

23:41

@Charlie, yes. It is $U(1)$ group.

Charlie

Thank you

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