The h Bar

DanielSank

12:19 AM

@ACuriousMind I require the name of that sitcom.

ACuriousMind

@DanielSank It (sadly) doesn't exist (yet).

0ßelö7

12:35 AM

@ACuriousMind instead of a PhD you should make a new Seinfeld

ACuriousMind

@0ßelö7 You know Seinfeld? I see at least some pop culture got to you ;)

0ßelö7

@ACuriousMind The only things I don't know are old movies and Simpsons

skullpatrol

I don't like the Simpsons either.

0ßelö7

They're yellow - can't be good.

What are they hiding?

skullpatrol

Yeah, and their voices are annoying.

0ßelö7

12:49 AM

I think I'm more attuned to the zeitgeist than anyone here, barring @BalarkaSen

skullpatrol

(semi-removed)

Welp, 7 days and counting...

~~Welp~~ whelp

Have you @0ßelö7 seen the movie called "The Raging Bull"?

ZeroTheHero

@Blue see uscibooks.com/harte.htm

0ßelö7

2:17 AM

@BalarkaSen TITLE: Group Actions on Large Scale Spaces II

We will prove the following theorem:
Let X be a discrete bounded geometry metric space and let $\mathcal{X}$ be the large scale structure induced by the metric on X. Let G be an amenable group that acts on X by coarse equivalences. If $(X,\mathcal{X})$ has property A, then $(X,\mathcal{X}_G)$ has property A, where $\mathcal{X}_G$ is obtained from $X$ by trivializing the action of $G$.

Balarka Sen

Uh, cool story

I don't know what that means though

0ßelö7

Me neither

the last talk was pretty vague

I asked you for geometric group theory references and didn't get a response

Balarka Sen

Oh, did you?

I guess I didn't see the ping

0ßelö7

Aug 30 at 20:08, by 0ßelö7

@BalarkaSen what the hell is geometric group theory and how do I learn it

the talk went off the rails, something about Novikov conjecture and KK theory

the K theory of a K theory?

something like that

Balarka Sen

I don't know that flavor of coarse geometry. For geometric group theory; I haven't really tried to read it thoroughly but I have heard Kapovich's notes are good

Alternately you could dive headlong into Gromov's "Hyperbolic Groups" paper but he's unreadable

0ßelö7

2:30 AM

unreadable by your standards or mine?

Balarka Sen

mine. I have never been able to read a single thing by Gromov

or at least whatever I tried to read

0ßelö7

what's the issue?

Balarka Sen

Exposition, I guess. It's all sorts of ideas clamming into each other hither and tither.

I'm sure you can find better references that what I mentioned by just googling though

0ßelö7

meh, my reading list is out of control

Balarka Sen

pick 5 essentials out of your reading list and burninate the rest

Like, really

0ßelö7

2:35 AM

@BalarkaSen I was commissioned for some talks at the new geometric analysis seminar

one on my research, another on regularity theory/Laplacians

so there's two books on my reading list

Balarka Sen

gr8

0ßelö7

@BalarkaSen do books for class count?

Balarka Sen

probably not

0ßelö7

ok, currently reading chapter 5 of "Classical Fourier Analysis"

that's for a class though, maybe

@BalarkaSen Ok I'm not actively reading 5 books.

But there are 10 books that are waiting for me

@ACuriousMind Jeez, how many things are you subscribed to? I just got an email with 50 papers

NeuroFuzzy

3:19 AM

@vzn I can't do anything before the 26th of Sep!

skullpatrol

3:45 AM

o/

Avantgarde

5:28 AM

@skullpatrol o\

Secret

7:03 AM

Weapon idea from one of my chemistry collegue:

Alcuberrie cannon:

Given that we knew there's this horizon problem with the warp bubble, and the divergence of energy at the boundary of the bubble which result in the energy to be released to the surroundings when the drive stopped at its destination

, we can perhaps exploit this fact by propelling e.g. a lead bullet sized object in a warp bubble, then disengage the warp bubble to deal massive destruction at the target

But now, with this idea in mind, things will get interesting. Since the alcuberrie drive effectively allow FTL travel, it means such scheme will allow the realisation of FTL bullets, so the dynamics of what happens when a warp bubble collide with some matter energy will be important. Perhaps spacetime warps just right to preserve causality

reddit.com/r/AskPhysics/comments/2v6u12/…

Anonymous

8:26 AM

I need some advice on this: I need some details and clarifications regarding the methods used in this paper. Also, I want to know about the recent developments they have made in this area (if any). Would it be better to mail just mail one of the authors and wait for a reply and if they don't mail the next author. Or, should I mail all of them at once? Or, should I send out blind carbon copy mails?

Anonymous

I wouldn't want to come across as a desperate and pestering mailer. Moreover, they might not be willing to reveal some of the developments, but that's okay. :P

Anonymous

It seems the authors are from UW Washington...

Emilio Pisanty

9:10 AM

@Blue easy: email the corresponding author

they're usually easy to identify because their email address is on the paper

if there's more than one corresponding author, send a single email to all the addresses on the paper, so that they know the others have also received it.

Anonymous

10:50 AM

@EmilioPisanty Thanks a lot. I'll do that =)

Emilio Pisanty

11:03 AM

@ACuriousMind How is this unclear?

it's a shit post, but it's quite clear what the core question is

ACuriousMind

@EmilioPisanty That's a link to this room ;)

Emilio Pisanty

gah

user84215

Can you tell me which moderator has removed my pin on one of my posts?

John Rennie

What was the post? I'm probably the main depinner hereabouts.

user84215

the first post in the physics workshops room

John Rennie

11:08 AM

Link?

user84215

This is the link chat.stackexchange.com/transcript/message/39715026#39715026

John Rennie

You mean a post in a different chat room? If so it wan't me since I only have power over posts in this room.

ACuriousMind

@EmilioPisanty I agree the main question is probably how Voyager took photos, but pretty much in every sentence of that question I find myself wondering: What is this sentence referring to? What old post? What low light? What images exactly? Why would the speed make them blurry if the target is far away?

I think it would do us a disservice if we communicated that such a post passes as "clear" here.

user84215

@ACuriousMind Can you tell me why I can not pin my message?

Emilio Pisanty

@ACuriousMind I think we're served well enough by piling downvotes on the thing, but OK

John Rennie

11:12 AM

@MathematicsAminPhysics you can't pin it here because you aren't a room owner here.

I can't see the room owners in the Physics Workshops room, but it looks like you're a room owner there so you should be able to pin it there.

ACuriousMind

@MathematicsAminPhysics I haven't been to your room at all and moderation action on stars/pins is one of the few things that are not logged (at least not in a place I can see), so I have no idea who might have acted on that message

user84215

I am the room owner, and I can not pin my message.

Secret

Have you happened to previously unstar/remove pin them? I recall in one of my rooms after I remove the star, somehow the system thinks I have removed the star and thus the message cannot be pinned anymore

user84215

Maybe

0ßelö7

@JohnRennie "Can Superconducting Cosmic Strings Piercing Seed Black Holes Generate
Supermassive Black Holes in the Early Universe?"

I think vixra has leaked into arxiv

John Rennie

11:17 AM

:-)

user84215

Now what should I do?

John Rennie

@MathematicsAminPhysics I've no idea why you can't pin posts in your own room. Maybe send a mail to the SE team?

Secret

Back in that time, my message is short and incoherent enough, thus I just retype and star/pin the new one. But if the original is really important, I guess you might need to ask the SE team about how exactly this works, or whether this is a bug

ACuriousMind

Hm, I can pin messages more than once but that might be a mod power.

Secret

@0ßelö7 That's a really weird title, but breifly skimming, at least maths layout-wise, definitely not vixra material

as for physics-wise, I lack the background to comment

Johnrennie, try pin, unpin and repin a test message in this chat and see if you can repin it after you unpin/remove star it

John Rennie

11:22 AM

Pinned ...

Unpinned ...

Ahhhh I can't pin it again.

user84215

Yes, I think this is also my problem

Secret

What does the error said. Is it something along the lines of "you already unstar this message"?

ACuriousMind

In that case, the system is working as intended.

user84215

My error is "You have already voted, but the voting has been cleared by a moderator"

0ßelö7

@ACuriousMind so is American politics

Doesn't mean it's not broken

Secret

11:26 AM

@ACuriousMind why is it a good idea to stop chat owners from multipin a message?

John Rennie

@MathematicsAminPhysics yes, that's the message I get too. You'll need to repost the message as a new post then star and pin the new post.

ACuriousMind

@Secret Presumably because the star board is intended as a "recent highlights" thing, not a "best of all time" thingy. If there is something you want to tell users permanently, stick it in the room description, not the star board.

user84215

Thanks

Secret

Right, make sense

Emilio Pisanty

11:45 AM

I know I've asked this before, but

wasn't there a user with this username before?

Countto10, Kilkenny, Ireland

133 7

user84215

I want to send a question on the Meta and advertise the physics workshops room. I hope this is not off-topic.

Emilio Pisanty

this one's marked as Member for 10 days

Secret

physics.stackexchange.com/users

Two "delete my account", sounds suspicious

Emilio Pisanty

@Secret har har. I obviously looked already.

John Rennie

@MathematicsAminPhysics not on the Physics meta please

Emilio Pisanty

11:47 AM

@MathematicsAminPhysics you can submit an advert on the community-ads thread

user84215

@JohnRennie Questions about chat rooms are off-topic?

Emilio Pisanty

huh

physics.stackexchange.com/users/163104

Secret

yeah, they are not related to the main, afaik

user84215

@EmilioPisanty How can I do that?

John Rennie

@MathematicsAminPhysics the physics meta is for questions about how the physics SE works. That's all.

Emilio Pisanty

11:48 AM

12

Q: Community Promotion Ads - 2017

It is a bit late into this new year, being that we're already in the second month, but we are now cycling the Community Promotion Ads for 2017! What are Community Promotion Ads? Community Promotion Ads are community-vetted advertisements that will show up on the main site, in the right sidebar....

discussion community-ads

post an answer that's up to the specifications

if it gets score 6 or bigger it will be displayed on the main site

... which of course means that you need six or more people to agree that it's worth advertising

@Countto10 Thank you for your effort. You did more than you had to. — Adam Feb 28 at 19:21

^ also that?

user84215

Thanks.

Secret

It occurs to me that if you placed them very, very far apart, such that more of the universe was between them than was outside them, wouldn't they be pushed apart for the same reasons? Could this be what causes the universe to expand? I do appreciate that this is a thought experiment only, but the universe is not a "container" in the sense of anything we observe on Earth. I am not sure that you can say more of the universe is on one side of the plate than the other. — user146020 Mar 15 at 21:55

user 146020 was countto10

but why is he constantly deleting his account?

Martin Sleziak

@MathematicsAminPhysics This seems to be the bug described here: Starring or Pinning a message that got cleared by a room owner gives off a wrong error message and Does pinned post in a chat room get moderator attention?

Emilio Pisanty

Also possibly user108787?

Secret

(One reason I can locate his comments is because 1) Search bar = countto10, and then trace back and 2) I really don't like that emotion induced when I look at his comments

Emilio Pisanty

11:55 AM

@ACuriousMind & mods, can you confirm that?

Secret

He strikes me as ... snarky

Emilio Pisanty

and is there a way to tell whether it's the same person serially deleting and recreating an account with the same name?

That strikes me as vaguely off w.r.t. the rules of the game

Secret

I know nothing about the under the hood stuff of user accounts, Acuriousmind and other mods may be a better person to ask

but presumably each account has an IP address?

Emilio Pisanty

@Secret I'm not sure that's available to mods

but given that this is the (third?) time this happens, maybe it's worth pinging the community team to see if there's something weird going on?

Secret

sounds like a good idea

ACuriousMind

12:27 PM

@EmilioPisanty Deleting and recreating your account is not against the rules unless you're circumventing some sort of system restriction by that (like question rate-limiting or suspensions)

Secret

Countto10's comment may be snarky (at least how I felt), but i don't recall him running into any trouble with the community nor have a bad reputation

People deleting accounts and recreating a new one is also not unheard of. They do it for a variety of reasons

heather

12:49 PM

fwiw, Countto10 is a very nice/good user. They delete their account because they do not like their rep getting too high (for whatever reason) and crazily enough, if they didn't, they'd probably over 100k now.

and i sincerely doubt anything weird is going on @EmilioPisanty/@Secret

Secret

Though this is a valid reason, why will someone worry about getting high rep?

heather

::shrugs:: I don't know, each to their own.

0ßelö7

What is up with Count to 10?

ACuriousMind

@heather I doubt they'd be anywhere near 100k, but yes, they'd have a lot.

heather

@ACuriousMind well, I think most times they delete an account when it reaches ~10k , and I know they've deleted their account a lot, so. But you're right, maybe not 100k.

Secret

12:56 PM

What happens when someone get 10K rep?

heather

physics.stackexchange.com/help/privileges/moderator-tools

^access to mod tools

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