The h Bar

By the way, your "mathematical terms in English words" were not automatically turned to the appropriate MathJax symbols. That was actually community members formatting the post to be easier to read and search through. I'd suggest reading the links from Qmechanic to see how to do it yourself. — JMac 2 hours ago

0ßelö7

damn

what noob

it could have been the perfect troll

Emilio Pisanty

I mean, I can sort of see it from their perspective

Balarka Sen

ravioli ravioli please latex my formuoli

Slereah

2:40 PM

samuel-lereah.com/articles/Physics/warp-drives

Making some SVG spacetime diagrams

I wonder if SVG diagrams would pass on a SE post

0ßelö7

@BalarkaSen light 5

Balarka Sen

is that what fantano gives it

0ßelö7

yes

Balarka Sen

sad

he's a big fan of GY!BE so that's disappointing

Slereah

What is a gybe

0ßelö7

2:43 PM

an obscure band

0

Q: Faraday's Law and superconductor

If I move a magnet towards a superconductor ring, would a constant current be induced in the ring. If yes,how can we calculate the current induced? Would the electron energy be finally radiated away?

@BalarkaSen second account?

Balarka Sen

um, uh, you got me

it's me, indeed

0ßelö7

gotem

Balarka Sen

i dont trust the melon man blindly on reviews like this though so i might still put it on my will-check-it-out list

sometimes his strong 6 or light 7 albums have turned out to be my favorite :P

John Rennie

@0ßelö7 I was probably about 11 or 12 when Star Trek was first shown in the UK, and I remember it seemed pretty amazing. But that was a long time ago in a village far, far away. To be honest the original series looks pretty crap these days.

0ßelö7

melon has been off lately

Balarka Sen

2:48 PM

true

Slereah

TOS is pretty bloody cheap

And Chekov was the worst character

chekov was basically TOS's Wesley

Do u remember when they tried to pass a dog with a plastic horn as an alien

0ßelö7

terms of service?

Slereah

The Original Series

People pretend it's great but it is fairly mediocre for the most part

TOS movies are great, though

Star Trek 2 through 6 are the best movies of the series

0ßelö7

so like Rudin

or GTA San Andreas

Slereah

Or Super Mario games

Or Sonic

0ßelö7

2:51 PM

@Slereah you take that back

::unsheathes katana::

Slereah

I tried playing them again a few years back

it's not that good

0ßelö7

Balarka Sen

play catmario

0ßelö7

actual footage of me in combat

Slereah

the ancient American martial art

Balarka Sen

2:57 PM

actually i just downloaded catmario

i dunno why

yolo

Prathyush Poduval

@0ßelö7 suprised you're still alive

Balarka Sen

i regret downloading the game already

0ßelö7

@PrathyushPoduval ...why?

Prathyush Poduval

@0ßelö7 Your technique is very poor technique

Kingsman - Church Fight (1080p)

►

This is how you fight

with awesome music playing in the background

Semiclassical

@Slereah i'm surprised you're counting number 5 in there.

0ßelö7

3:11 PM

@Semiclassical next fluids homework is about the Schroedinger equation 🤔

Semiclassical

hah

0ßelö7

It's due in like 3 weeks

I don't know what's up with that

Semiclassical

something to do with superfluids, possibly

0ßelö7

@Semiclassical no, apparently there's an analogy between solns of the SE and the Euler equation

Emilio Pisanty

3:28 PM

yo @ACuriousMind

I have changed the definition of the Lorenz gauge condition on Wikipedia, and it has not been changed back for 48 hours. So I am becoming optimistic that it is now official that this is: — Stephen Wynn 1 min ago

do you want to take care of that, both wp-side and here?

or should I?

ACuriousMind

@EmilioPisanty Persistent, huh? I can take care of that, yes, let me just finish cleaning up another mess :P

Emilio Pisanty

@ACuriousMind sure.

ping me when you edit wikipedia, and I'll reply here.

and this is probably a good time to try and give a heads-up to folks on WP who can provide a tighter watch.

ACuriousMind

@EmilioPisanty How would one do that?

Emilio Pisanty

and provide them with a full transcript of extant & deleted content on all the relevant threads, I should think

@ACuriousMind dunno

ACuriousMind

I mean, I'd know what to tell them, but I have no idea who to contact

Ah, found something. I'll have to read their help pages on vandalism first, though

Emilio Pisanty

3:34 PM

@ACuriousMind yeah, I'm there, it looks like a job

ACuriousMind

Hm, it appears they only want reports on vandals that have been warned, and warnings are to be issued by the people detecting and reverting the vandalism

Physics Meta

0

Q: Buggy behaviour of spoiler tags when they contain both text and images

I know that we don't use the spoiler syntax in Markdown very often, but it seems it's a bit buggy, at least on this site. Consider the following test of the spoiler tag, containing both some text and an image: >! This is a test of the spoiler tag. >! ![](https://i.stack.imgur.com/vECQ8.jpg) ...

bug markdown spoilers

Slereah

@Semiclassical I'll take Star Trek 5 over 1 or any newer ones

It felt like a proper Star Trek movie despite its flaws

ACuriousMind

Is the 5 the whales?

Ah, no, it's a different one

Emilio Pisanty

> Even if misguided, willfully against consensus, or disruptive, any good-faith effort to improve the encyclopedia is not vandalism.

from en.wikipedia.org/wiki/Wikipedia:Vandalism

but it doesn't reaaaally cover this case

> edit warring over how exactly to present encyclopedic content is not vandalism

this isn't about "how to present", though

ACuriousMind

3:44 PM

@EmilioPisanty It doesn't? I believe the user genuinely believes they are correct, so they are making a "good-faith effort" to correct what they see as errors.

Semiclassical

@ACuriousMind yeah, 5 is "god is at the center of the galaxy and the enterprise is the only ship that can make the journey"

Emilio Pisanty

@ACuriousMind no, as in, there's no specific guidance for the situation here

ACuriousMind

Maybe the policy that applies here is "no original research"?

Since there's not a single source you can cite for the wrong condition.

John Rennie

@EmilioPisanty you have far too much free time :-)

Emilio Pisanty

@ACuriousMind that's a stickier point, though, innit?

@JohnRennie no I don't

I was doing my very best to prevent this from going HNQ

(well, OK, not my very best, that would've included not answering)

John Rennie

3:47 PM

I suppose spoiler tags are useful when you have a long involved derivation and don't want to give away the ending :-)

Emilio Pisanty

see the revision history

and tell me that isn't an enormous box of HNQ kindling sat below a crate of TNT, with some lit matches hanging about ready to fall on the kindling

didn't want to mention that example so as not to funnel even more traffic thataway

John Rennie

Some things are just an inevitable part of life, like death, taxes and daft questions getting on the HNQ

vzn

GW170814 : A three-detector observation of gravitational waves from a binary black hole coalescence / LIGO

Emilio Pisanty

@JohnRennie yeah, well, but the combo of Neil deGrasse Tyson + GoT on the title can mean the difference between a day and a week on HNQ

vzn

↑ 1st correlation with VIRGO

Emilio Pisanty

3:53 PM

@ACuriousMind it's more of an edit war than original research, no?

but maybe add an explicit citation when you roll it back

ACuriousMind

Hm, I rolled it back right now. Good idea, though for an explicit citation I'd need an EM book...of which I possess none :)

@EmilioPisanty Well, it is an edit war where one side is the orthodoxy and the other original research. If this back and forth triggers some Wikipedian to look into the edit war, that's also not a bad outcome

Emilio Pisanty

@ACuriousMind I don't think it's enough traffic to trigger any automated warnings

and yes, I agree

but then the WP pages have things like

> If an edit war develops, participants should try to discuss the issue on the talk page and work things out.

John Rennie

Well that's pretty conclusive

Emilio Pisanty

that need to be considered much more carefully given the existing interactions.

ACuriousMind

@EmilioPisanty Yeah, but there's nothing to talk about with this user, which is also evident from the talk page and their user talk page already (another user also commented they don't understand relativistic notation, they just replied with "the Lorenz gauge page is wrong")

Emilio Pisanty

3:57 PM

@ACuriousMind cf. my last comment ;-)

it's just a matter of getting that information to the correct hands WP-side

and therefore of first finding what those correct hands are

ACuriousMind

@EmilioPisanty Well, we have determined it's not the vandalism report desk, but I'm not finding anything else right now

Emilio Pisanty

@ACuriousMind I'm having a look at the edit-wars help pages

ACuriousMind

Well, at least we are not at the three revert rule yet :P

John Rennie

The Arxiv link for the latest GW detection is here

Semiclassical

@EmilioPisanty i saw the phrase "edit-wars" and suddenly imagined a serious documentary-style TV series describing edit wars on Wikipedia

Emilio Pisanty

4:00 PM

@ACuriousMind the 3RR is over 24 hours

Semiclassical

and it made me giggle

Emilio Pisanty

we're unlikely to get to that threshold

ACuriousMind

@EmilioPisanty Yeah. I'm not seeing anything about "slow motion" edit wars, though

Ugh, all these resolution methods seem to assume I'm someone interested in participating in Wikipedia beyond just reverting this crap and be done with it :P

Emilio Pisanty

@ACuriousMind yeah

Or maybe we should be looking here

for the editors that actually wrote that page

and who might be persuaded to put it on their watchlist or something

ACuriousMind

@EmilioPisanty All major edits seem a bit long ago for that

Emilio Pisanty

4:07 PM

@ACuriousMind yeah, and the last user to put in substantial content is now gone

0ßelö7

@ACuriousMind the "poincare group" of a fold

is likely just the fundamental one right

ACuriousMind

It's...possible, I guess?

Balarka Sen

i think so

that sounds like old terminology

Emilio Pisanty

@ACuriousMind I just saw your message on his talk page

sounds reasonable

ACuriousMind

I'll make a mental note to check back on Wiki in a few days

Emilio Pisanty

4:18 PM

@ACuriousMind yeah

but then, his last edit is from 1 July

so, three months ago

ACuriousMind

The worst outcome would be that everyone forgets about it and he sneaks it back in in half a year :P

0ßelö7

@Semiclassical we started viscous flow and he was doing stress tensors and stuff. As an official index calculation master I was pretty bored. Never thought that would end

David Hammen

4:33 PM

Not spam for some weight loss / exercise program: I lost ten pounds, lost a couple of inches around my waist, and gained a couple of inches around by chest thanks to the Body By Harvey exercise program. Not highly recommended.

In other words, my house was one of many in the Houston / Galveston area that took on water. That's why you haven't seen much of me recently.

CooperCape

Please someone edit out "Also don't edit" just 'cause fun

Semiclassical

@0ßelö7 yeah

i find hydrodynamics pretty boring for that reason

respectable, certainly

but boring all the same

ACuriousMind

@CooperCape Apparently a reaction to kind users trying to make their post better, see the exact dupe I closed it as.

0ßelö7

@Semiclassical tbh, I find most of physics to be very computational like that

intro physics consists of small tedious calculations, more advanced consists of long tedious calculations

Semiclassical

can't really argue with you there. there's a lot of stuff which is just not inherently interesting

0ßelö7

4:42 PM

once we actually have the Navier-Stokes equations it will be more interesting, but the road to getting there is proving to be a pain

ACuriousMind

@DavidHammen I hope you and your friends and family are okay!

Semiclassical

for instance, the concept of multipole moments is actually pretty neat. monopole distributions can be described by a scalar quantity; dipoles, by a vector quantity; and so forth

0ßelö7

Although I will admit something that I probably shouldn't

Semiclassical

but doing computations with them is just boring

0ßelö7

When I was presenting my poster on math.GR I was talking to a math student

he had no clue about any of it, and was wondering why I was doing physics

he said he had no reason to know any physics

I felt personally offended

ACuriousMind

4:44 PM

Ah, there's a physicist in you after all :)

CooperCape

@ACuriousMind Ahh I see... Wild...

Semiclassical

reminds me of the one bit of CP Snow's 'The Two Cultures' which gets quoted

"A good many times I have been present at gatherings of people who, by the standards of the traditional culture, are thought highly educated and who have with considerable gusto been expressing their incredulity at the illiteracy of scientists. Once or twice I have been provoked and have asked the company how many of them could describe the Second Law of Thermodynamics. The response was cold: it was also negative. Yet I was asking something which is the scientific equivalent of: Have you read a work of Shakespeare’s?

ACuriousMind

@CooperCape By far not the wildest occurence I've had to moderate :P

David Hammen

@ACuriousMind I'm fine, family is fine, pets are fine. My house is very un-fine. One thing survived intact: The 1970s era wallpaper in the kitchen that starts a yard / a meter above the ground. When we bought the house we agreed that that had to be the first thing to go. It's still there.

0ßelö7

@ACuriousMind The math I find interesting is essentially based on or motivated by physics.

I don't think I would understand math without a physics background.

Semiclassical

4:45 PM

The instance of this which I find frustrating is special functions.

Slereah

Or as you call it

Emilio Pisanty

@ACuriousMind yeah, exactly

Slereah

PhD level math

0ßelö7

@Slereah No, PhD level math is the math not based on physics.

Emilio Pisanty

I think we do ought to at least try and do what we can now to prevent that from happening

Slereah

4:46 PM

that is what I meant

ACuriousMind

@DavidHammen Heh, of course it is

Semiclassical

I can understand why special functions are a bit dry, but they just get dismissed as 'engineering math'

0ßelö7

wtf

Semiclassical

refresh?

ACuriousMind

Congratulations, you have resized your text box out of existence :P

0ßelö7

4:48 PM

Was this always possible!??

Balarka Sen

that's a god meme

ACuriousMind

Just click on the lower right corner and drag to the right

@0ßelö7 Yes

Semiclassical

well damn

0ßelö7

@Semiclassical by whom?

Semiclassical

@0ßelö7 hence why I find math like logic or set theory, at least in the abstract sense, hard to get excited about

0ßelö7

4:49 PM

@Semiclassical Agreed.

ACuriousMind

@Semiclassical It's called "specialization" :P Not saying that makes it all fine, but..it's a phenomenon that's hard to reverse once it's started

Semiclassical

@0ßelö7 i guess i just have a general sense of math people not having much respect for special functions

0ßelö7

@ACuriousMind Not knowing the 2nd law of thermo is like a mathematician not knowing what a continuous function is

Balarka Sen

Semiclassical

@ACuriousMind I imagine part of it is also that people view special functions as just 'classical math'

and therefore not worthy of interest

ACuriousMind

4:51 PM

@0ßelö7 Yes, precisely. (Maybe I should point out I replied to the quote, not the specific thing about special functions)

0ßelö7

@ACuriousMind I am on my computer, clearly.

I can see replies here...

@Semiclassical I will make a broad statement and say that it's algebraists or topologists who would think that.

ACuriousMind

@BalarkaSen I've had my task bar at the top of my screen for so long that I was genuinely puzzled by what that thing at the bottom of your screen is :P

vzn

"2 cultures"? strange how many "physicists" profess to dislike fluid dynamics etc o_O

0ßelö7

In my experience, analysts (not operator algebraists) are very close to physics and there's a lot of overlap.

Balarka Sen

@ACuriousMind I am not an upside-down man

Semiclassical

4:53 PM

Fluid mechanics is an odd duck

0ßelö7

Fluid mechanics is at the strange intersection of engineering and incredibly sophisticated PDE theory.

vzn

@Semiclassical ?!? think that maybe scientists live in abject fear of its inherent nonlinearity

Semiclassical

It's also (largely) in the realm of classical physics

vzn

@Semiclassical would like to hear more about your pov/ expertise on "(semi)classical" physics, you named yourself after it... so-called classical physics contains many complexities/ surprises...

ACuriousMind

Yes, I have indeed nightmares where I'm hunted by non-linear PDEs.

Semiclassical

4:55 PM

I dunno about nonlinearity being the issue

ACuriousMind

"abject fear" is a bit strong though, they usually succumb to a sponge wiping them off the blackboard.

Semiclassical

i just find it hard to get interested in it

0ßelö7

different people are interested in different things

Semiclassical

true enough.

0ßelö7

but my point was that even though analysts get a bad rap for $\epsilon$s and $\delta$s, I think they'd be the last of the "pure math" people to call special functions "engineering math"

Semiclassical

4:57 PM

as far as annoyance goes, I can't say I really get annoyed by people not being interested in what I am

0ßelö7

In fact, many math departments in Europe classify math.AP as "applied math"

ACuriousMind

Yes we do!

Balarka Sen

@Semiclassical I do get disappointed though

Semiclassical

what I do get annoyed with is people assuming that one shouldn't be interested in what I am, and should instead be interested in what they are

0ßelö7

@ACuriousMind is that directed at me?

Balarka Sen

4:58 PM

DISAPPOINTED

0ßelö7

@BalarkaSen 3-manifolds are boring

4-manifolds are worse

Semiclassical

I mainly have in mind some people who seem to think logic is the end-all-be-all of math

ACuriousMind

@0ßelö7 Yeah. Just goes to show that pure/applied is sometimes less an objective terminology and more about acedemic politics, I guess

Semiclassical

(or integrals, or etc)

ACuriousMind

@Semiclassical Wouldn't it logically be the first-all of math? :P

vzn

4:59 PM

@Semiclassical fluid dynamics nearly ubiquitous across many physics fields... think it impinges on many areas of physics... many diverse angles... bose-einstein condensate is a fluid etc... (nobel prize winning stuff, along with many other nobel prizes for it)

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