Mathematics - 2014-06-19 (page 1 of 4)

12:05 AM

@robjohn: Not that I care about 10 rep points, but did you have a moment to check on those downvotes I got suspiciously yesterday?

Pedro Tamaroff

@TedShifrin I don't care about the rep.

I care about the people that maliciously downvote.

@robjohn Do you have my e-mail? I think I am entitled to knowing who's maliciously downvoting me (and other people).

Ted Shifrin

I wasn't meaning to sound like you did, @Pedro. You missed my war yesterday.

Pedro Tamaroff

@TedShifrin With Don?

I didn't!

Mike Miller

@Pedro Why would you be entitled to that knowledge, especially if the SE team hasn't called it malicious?

Pedro Tamaroff

I actually voted to delete the answer.

Ted Shifrin

12:11 AM

Yeah, @Mike's right.

Pedro Tamaroff

@MikeMiller I think they told robjohn who's downvoting, and it's clearly malicious, don't be naïve.

Ted Shifrin

Oh, I forgot I can do things like that now ....

@Pedro: I think you and I may occasionally deserve downvotes.

robjohn

@PedroTamaroff no one told me, and I can't say who I think it is.

Pedro Tamaroff

@TedShifrin Why?

Mike Miller

@Ted Why is the first paragraph of this follow? I assume he means $Diff^+$ (else by Smale's result it certainly is not connected...), and I don't see why connectedness follows from the extension bit. My first thought was the alexander trick but I can't figure out how to apply it.

Ted Shifrin

12:14 AM

@Mike: I keep telling you I don't know this stuff!

Mike Miller

@Pedro "Don't be naive" =/= the mods have considered it malicious and punished the offenders and thus can tell the users involved

Kevin Driscoll

Before the end of the day I'll have won Pedro over to my 'all votes should be signed' proposal! #BuildingTheCoalition #YesWeCan

Mike Miller

They shouldn't, though.

Ted Shifrin

I never have downvoted without first putting a comment explaining why.

Mike Miller

@Ted That doesn't make sense. You know more than me, and I don't know this, therefore you know this. It's basic logic.

robjohn

12:18 AM

@KevinDriscoll It would certainly be nice if the people who have cast x% of their votes as downvotes would at least justify x% of their downvotes.

Ted Shifrin

Unless it was just total crap.

Kaj Hansen

@KevinDriscoll, if that were the case, that would encourage revenge-downvoting.

Ted Shifrin

You'll love that logic when you start teaching in the fall, @Mike.

Which is what I think I got, @Kaj.

Kevin Driscoll

@Kaj it would certainly allow for it while the anonymous scheme doesn't. But it would be revenge downvoting in the open. I think everyone here is smart enough to realize when that's happening.

Kaj Hansen

@TedShifrin, oftentimes I'll downvote questions that are clearly homework and demand us to give them the answer. It's definitely frustrating when I get a downvote or two on answers, and I have no clue why they were justified. Especially when they're accompanied by a handful of upvotes.

Mike Miller

12:20 AM

@Ted Presumably as a first year I'll be teaching calculus at most... I bet I know enough calculus to get by.

Ted Shifrin

It was your students' logic to which I referred, @Mike.

AWertheim

Yeah, @KajHansen. Opinions on downvotes so widely vary in this community. But I think that they can be very discouraging if unaccompanied by any explanation. This is certainly amplified when users seem to be "targeted".

Mike Miller

@Ted Well, I thought you meant students would use that logic on me. But I'm hoping they'll be asking about u-substitution and not diffeomorphism groups.

Ted Shifrin

Well, @Kaj, I flipped out at a 100+K who answered a takehome exam question when the OP specifically asked for no help, just clarification of the question!

Karl Kronenfeld

hm, caring about downvotes

robjohn

12:22 AM

@PedroTamaroff: I have forwarded what information I have to the community team. They are the only ones who can do anything anyway. I don't know if they will reverse any of the downvotes today, but there is a chance.

Ted Shifrin

@Karl: No, I care about the self-righteous majority who want to turn this place into a homework/exam answer factory.

robjohn

@TedShifrin I hope that wasn't me. I try not to do that, but sometimes you see the question and just answer from the title. By the time you notice the request in the question, it is too late.

Kaj Hansen

@KarlKronenfeld, it's important to care about downvotes, not from a rep standpoint, but because it tells others trying to benefit from this site that something is wrong with a legitimate answer.

Karl Kronenfeld

@TedShifrin I was referring to a conversation earlier. I feel too that this should not be a place for doing work for others.

Ted Shifrin

No, @robjohn, if it had been you, I would have bitched loudly in person to you. It was DonAntonio who, I believe, then went on a mini-spree downvoting various of my answers.

Com Truise

12:26 AM

there are one or two users here who take things a little too seriously, pouncing on me whenever I make a post. It is shocking if you are new to the site, but after a while I just shrug it off.

robjohn

@TedShifrin good. I would expect no less :-)

Mike Miller

@Karl I care about downvotes that put my answers negative for no apparent reason, since it makes my answers look bad or wrong. I don't care about the rep.

Karl Kronenfeld

@KajHansen I get the sense that these serial downvotes comprise such a small portion of the pool of votes that it is virtually inconsequential in that sense.

robjohn

Time for the park. BBL

skullpatrol

My point was you can't ignore the powers of supply and demand @Ted

Ted Shifrin

12:28 AM

My strong opinions, among others, and frankness seem to have sent Brian into permanent disappearance. I did not appreciate his implicit attacks on me, either.

Com Truise

Brian Scott?

Karl Kronenfeld

@MikeMiller If you get no upvotes and just one improper downvote, consider improving your answer anyway to make it more attractive to the participants who would upvote it.

Ted Shifrin

Yes, @Com.

AWertheim

I think it is okay to care about downvotes in a more local sense. Sure, the reputation cost is negligible. But in a way, I view upvotes (when voting on answers) to be a kind of "Kudos, nice answer!" which at least makes me feel very good and happy about my answer. Downvotes feel like a signal saying "your answer is either seriously flawed or flat out wrong", which obviously feels bad, especially if you cannot see what is wrong with your answer.

Ted Shifrin

Or, in my case, registering disapproval of the answer's existence, @AWertheim.

But I say so loudly in a comment.

Kaj Hansen

12:30 AM

Agreed with @AWertheim.

Ted Shifrin

I rarely downvote a reasonable person for a flawed answer. I comment and try to get it fixed first.

AWertheim

@TedShifrin: certainly, and comments are essential in that way. I generally do not like downvoting, and have only felt compelled to do so if I have left a comment pointing out a serious flaw or error that was flat out ignored by the person who posted it.

Agreed, @TedShifrin.

Kaj Hansen

@TedShifrin, I think your latest downvote is the only time I've seen an accepted answer with negative votes.

Ted Shifrin

High five @AWertheim :)

AWertheim

High five :)

Kevin Driscoll

12:31 AM

Well, clearly by inspection everyone here leaves helpful comments when they down vote. Now we just extrapolate ot the rest of the Math.SE community and...........

Mike Miller

@KarlKronenfeld Usually I end up getting an upvote or something that cancels it out, but that's a good point.

Ted Shifrin

Accepted? @Kaj

Kaj Hansen

You know, when the OP clicks the green check mark to indicate that your answer was the most helpful, etc. math.stackexchange.com/questions/836573/…

skullpatrol

Thanks for joining Math Ed SE @Ted

Ted Shifrin

I have had numerous positive experiences teaching and leading an OP to an understanding, but it takes patience, and most high rep people here don't have the patience.

I haven't said much there, @skull, if anything.

Com Truise

12:35 AM

I always click up AND accept the amswer

skullpatrol

It's the thought that counts Professor @Ted :-)

Ted Shifrin

Oh, @Kaj, I believe that was one of the revenge downvotes to which I was referring.

Com Truise

I only have 793 points :(

Ted Shifrin

I'll look for good stuff you do, @Com.

Com Truise

its ok, but thanks

Kevin Driscoll

12:38 AM

Its funny how few people frequent this chat compared to the overall activity of the site. I think I have a very different perception of Math.SE because I spend most of my site time in this echo chamber as compared ot the rest of the site.

not that people here always agree, but it seems to happen more than I'd otherwise expect

Ted Shifrin

It's @Pedro's fault — He dragged me here a year ago.

Pedro Tamaroff

@TedShifrin Wat.

Mike Miller

@TedShifrin Diffeomorphisms don't restrict to diffeomorphisms of submanifolds and their images, right?

skullpatrol

Back when we used to call him Peter :-)

Ted Shifrin

Um, @Mike. Think dinner.

Mike Miller

12:47 AM

oh.

Kaj Hansen

Ok @PedroTamaroff, I think I've solved your problem. The only unfortunate thing is that the proof is very non-constructive. I can prove that $n$ is finite for any given $m$, but I have no idea what an upper bound might be. However, I do know that if you need an $n \times n$ matrix for a given $m$, then you need at most a square matrix of dimensions $2n+1$ for the $m+1$ case.

Pedro Tamaroff

@KajHansen The idea is to use Ramsey numbers, certainly, and define a coloring in an appropriate way.

Kaj Hansen

Interesting. I'll think of an approach that uses them in that case. I managed to avoid them entirely with my method though.

Mike Miller

@TedShifrin Well, I've upgraded the bill to lunch and a drink.

Com Truise

is this an interesting property for topological space $X$?: For all $\epsilon >0$ there exists a continuous surjection $f_\epsilon:X\to (0,1)$ such that diam$(f_{\epsilon} ^{-1} ({t}))<\epsilon$ for all $t\in (0,1)$.

$X$ assumed to be metric

Mike Miller

12:52 AM

Find something interesting about it, @ComTruise

Then it'll be interesting

Com Truise

like the curve $sin(1/x)$ should have this property

topologist sine curve without the left bar

Mike Miller

The graph of that from $0$ to $1$, say...?

Com Truise

yes

Mike Miller

But that's homeomorphic to $(0,1)$ (or $(0,1]$ if you want) without the left point.

Com Truise

the graph as a subspace of $\mathbb {R} ^2$ is not homeomorphic to the interval though

Mike Miller

12:56 AM

Yeah it is...

Unless I'm mistaken in a stupid way

no, I'm rather sure the graph of any continuous map $f: X \rightarrow Y$ (with the subspace topology inherited from $X \times Y$ with the product topology) is homeomorphic to $X$

Karl Kronenfeld

yes

Pedro Tamaroff

@KarlKronenfeld this is dog

Karl Kronenfeld

you use the projection for the inverse

Mike Miller

@KarlKronenfeld right, I was leaving the possibility open that the proof in my head didn't work

Com Truise

ok so thats not a good example

Mike Miller

12:59 AM

@TedShifrin You told me you didn't know this stuff.

Ted Shifrin

I don't :)

Mike Miller

Yeah okay.

Ted Shifrin

I have taught Guillemin & Pollack something like 8 times ...

Mike Miller

@TedShifrin What's $g_i$ supposed to mean? Just some smooth function?

AWertheim

@TedShifrin: Do you think Guillemin & Pollack is well suited for self-study?

Ted Shifrin

1:03 AM

Yes.

Com Truise

hmm, if I add the condition that $f_{\epsilon} ^{-1} (A) \subseteq f_{\delta} ^{-1} (A)$ for $0<\epsilon<\delta$ and all $A\subseteq (0,1)$, it might be the case that the functions $f_{\epsilon}$ converge to a homeomorphism

Mike Miller

I don't see why that's true. Taylor's theorem I guess. I'll go away now, though.

Ted Shifrin

Yes, it's quite readable, @AWertheim. If you want, I can send you my notes and exercise sets at some point, too.

AWertheim

@TedShifrin: wow, that would be wonderful, thanks!

Ted Shifrin

No, not quite, @Mike. I'm sure you read this in Lee.

Mike Miller

1:05 AM

Probably, but I've forgotten all the math I learned, @Ted

Ted Shifrin

Email me when you want, @AWertheim. I'll have to scan the notes.

AWertheim

Sounds good @TedShifrin, thanks again. :)

Ted Shifrin

It's often called the $C^\infty$ trick, as I said, @Mike.

Mike Miller

Can't find it.

I'll leave you be though.

Ted Shifrin

Hint @Mike: $$\int_0^1 \frac d{dt} f(tx)dt$$

Pedro Tamaroff

1:09 AM

le clasiqué

Karl Kronenfeld

1:38 AM

@ComTruise I can't convince myself that they should converge.

Kevin Driscoll

@Pedro Hows your combinatorics going?

Pedro Tamaroff

2:15 AM

@KevinDriscoll Hehe, I don't know.

On bad news, I cannot find my notes.

I prolly forgot them at my uni... =/

Kevin Driscoll

And the good news?

Pedro Tamaroff

Hmm... I did some exercises.

Charlie

goodevening Gentlemen

Kaj Hansen

Hello

Pedro Tamaroff

Hello.

Charlie

2:26 AM

@KajHansen hello, how are you?

Karl Kronenfeld

Not being gentle, I take offense to that.

Charlie

@PedroTamaroff hi Pedro, how is your night?

@KarlKronenfeld hello karl, how are things ?

Kaj Hansen

Not too bad Charlie

Pedro Tamaroff

@Charlie Not bad. I should be sleeping in a while, tennis tomorrow morning.

And it is fucking cold here.

Kaj Hansen

That's right. It's winter down in the southern hemisphere. It's been really hot this week up here.

Charlie

2:28 AM

@PedroTamaroff I suppose, good luck

@KajHansen good :)

Karl Kronenfeld

@Charlie Fine, how about you?

Charlie

@KarlKronenfeld I'm fine, thanks

Mike Miller

@Karl You are the gentlest anonymous person I know

Charlie

Excuse me , but does anyone know what does mean a matrix A with thiis symbol ~ above it?

Karl Kronenfeld

@MikeMiller lol, tries to figure out if that is a compliment

Mike Miller

2:31 AM

I'll never tell

Karl Kronenfeld

@Charlie Out of context, no.

Mike Miller

@KarlKronenfeld Clearly it means the matrix $\tilde A$

Charlie

@MikeMiller and what it represents?

Mike Miller

a matrix

Charlie

thanks

Mike Miller

2:33 AM

no but really, what Karl said, context is needed

Karl Kronenfeld

@MikeMiller You never know, it could be some oddball trying out a new notation for determinants.

Mike Miller

that's why it was a joke, not to be taken seriously, at risk of death

lol at proof #2

looootta stuff there

Ted Shifrin

2:50 AM

wb @robjohn

Mike Miller

@TedShifrin Why does any orientable surface embed into $\mathbb R^3$? Is that even true?

Welcome back by the way :D

Ted Shifrin

Huh? $2$-manifold?

Yes, it's true, by classification.

Mike Miller

@TedShifrin I didn't say closed.

Ted Shifrin

Compact with boundary?

Mike Miller

Even non-compact.

Ted Shifrin

2:52 AM

Noncompact? Still think those are classified by genus and number of ends.

Mike Miller

Ah, I think I read about that once. That should do it.

Ted Shifrin

I'm assuming that's somewhere in Whitney.

I think we can push any double-points to infinity or something.

Mike Miller

And with boundary follows imediately from the general case (consider the double).

Ted Shifrin

Right.

David Kirby

Heya @Ted, guess what?! I'm going back to school in the fall! I just wanted to thank you personally since hanging out in here and reading your messages was the final 'push' that I needed.. It's only KSU and I'm starting out as a third year, but it's a start! Any tips on who to take?

(and by 'push' I honestly have to thank everyone in here for showing me how little I truly know and how much there is left to learn...)

Mike Miller

3:04 AM

Does this have anything to do with complex analysis?

Bananarama

@MikeMiller why does there exist a "several complex variables" tag?

Mike Miller

on that question, or in general?

Bananarama

both

Mike Miller

1) because the asker is using the wrong tags

2) why is there a multivariable-calculus tag?

Bananarama

you don't think there should be a multivariable calculus tag?

Mike Miller

3:08 AM

i do

and by analogy there should be a several complex variables tag

Bananarama

ok

How can I have a question reopened?

I had a legit question closed...

Pedro Tamaroff

@Bananarama Go to your fridge.

Pick a piece of ham.

Cut it into four congruent circles.

Bananarama

that's gonna be hard considering circles have no volume

Pedro Tamaroff

Draw the letters, E, G, L, G (yes, the G twice) with mayo.

Then give them to a stray cat and set it on fire.

Mike Miller

set the letters on fire, not the cat

Pedro Tamaroff

3:12 AM

If the Gods are merciful, your question shall be reopened in four moons from today.

Bananarama

I would like to set some of my street's cats on fire

Mike Miller

the cat must be unharmed

it's tricky

Pedro Tamaroff

@MikeMiller No, the cat must be set on fire.

Mike Miller

the last question you posted that was closed was over 2 months ago

@PedroTamaroff you've been doing it wrong

Bananarama

yes, that's the one

Pedro Tamaroff

3:13 AM

@MikeMiller Oh, damn.

Poor Mr. Kittens.

Is mayo even flammable?

Mike Miller

both of your recent closed questions were marked as duplicates

Alexander Gruber

@TedShifrin Wow. it was up for >3.5 hours.

Bananarama

oh, never mind, I deleted it yesterday

Mike Miller

oh

Bananarama

it was totally legit btw

Mike Miller

3:14 AM

then why did you delete it

Ted Shifrin

Heya @Alex: What was?

Mike Miller

@TedShifrin the thing that made you furious

I dare not speak the name of he who did it

Bananarama

because it got closed

Mike Miller

ah

Bananarama

was it something about a guy giving unsolicited advice on a test question?

Mike Miller

3:15 AM

so you are a coward who flees from the first sign of adversity

i know your ilk

Ted Shifrin

@DavidKirby: Good for you! We can talk about it if you want ... Later.

Bananarama

my ilk?

Alexander Gruber

@TedShifrin That answer that pissed you off.

Pedro Tamaroff

@Bananarama Yeah, you had the m but then somone scared it away.

@AlexanderGruber YO.

Ted Shifrin

Oh yeah. It was.

Alexander Gruber

3:16 AM

(and is pissing me off now that I'm seeing it)

@PedroTamaroff Yoseph.

Mike Miller

I don't know his milk

but it better not be whole milk

that shit's nasty

Pedro Tamaroff

@AlexanderGruber I think I am being supah clear here

Ted Shifrin

I'm wondering if the student told his professor. Ha ha ....

Alexander Gruber

@MikeMiller you misspelled "delicious"

Bananarama

@MikeMiller what kind of milk is better than whole milk?

Mike Miller

3:17 AM

literally any other kind

Pedro Tamaroff

@AlexanderGruber Have you ever watched "It's Always Sunny in PA"?

Mike Miller

that's

you don't abbreviate philadelphia to PA

Alexander Gruber

@PedroTamaroff haha oh yes

Mike Miller

philadelphia $\neq$ PA = Pennsylvania

Ted Shifrin

Nothing we can do about assholes like Don, either. I first commented within a minute or so of his move.

Bananarama

3:18 AM

@TedShifrin who is don?

Alexander Gruber

@TedShifrin I wonder what the community would think about making that suspendable behaviour

Pedro Tamaroff

►

Alexander Gruber

I mean the guy asked specifically not to be hinted at

Pedro Tamaroff

LE MCPOYLES

Mike Miller

they would bitch endlessly about it, @AlexanderGruber, and it wouldn't happen

Pedro Tamaroff

3:18 AM

@MikeMiller Damn it, I tried.

PL?

Ted Shifrin

I bet you I'm still in the gross minority, @Alex, sadly.

@Pedro: Philly

piecewise linear?

who is don?

@MikeMiller do you think so? I find it hard to believe that even B.D. and crew would be against that. Their argument basically boils down to "we don't know the asker's motivation, so there's no reason to assume that he's being dishonest / lazy", but in this case the asker directly states that he wishes not to receive hints or solutions

Bananarama

3:20 AM

Toric Donut?

Ted Shifrin

A 100k+ twit, whom 've always been nice to before, e en when he messed up. NO MORE.

Mike Miller

@AlexanderGruber their argument is not the same as their response

they want an entirely laissez-faire community

Pedro Tamaroff

That's why people invented bonfires, people.

They are meant to be used.

Alexander Gruber

@MikeMiller you think they're just anarchists?

Mike Miller

libertarians

which is just as bad, because libertarians really exist

2

Ted Shifrin

3:21 AM

@Alex: I don't know if you noticed, but immediately after that I got a bunch of downvotes ... I think just about the only ones I've ever had.

Kaj Hansen

@MikeMiller, now now

Ted Shifrin

I think professors need to stop giving takehome exams, too. That bus left the station a long time ago.

Mike Miller

@PedroTamaroff edit the answer you linked

Alexander Gruber

@TedShifrin oh wow, that's BS. i'm looking into it.

Ted Shifrin

Thanks, @Alex.

Mike Miller

3:24 AM

@TedShifrin takehome exams are fine if the questions aren't googleable, or if they're easily googleable and one can just look at the first few results to see if the students copied.

Pedro Tamaroff

@MikeMiller You downvoted me. LEL

Mike Miller

@PedroTamaroff i was trying to annoy you, but you didn't complain about it, and i forgot to undo it.

Ted Shifrin

Everything is SE-able, @Mike, as we've just established.

Mike Miller

@TedShifrin search on SE for them...

Kaj Hansen

Besides, if @TedShifrin gave a take-home exam, it would be guaranteed to be hard as hell.

Ted Shifrin

3:25 AM

@Mike: Did you finish the proof I outlined?

Mike Miller

no, my consistent failure depressed me so I took a nap instead

Ted Shifrin

How do I prove the student didn't come up with it himself, @Mike?

* spanks @Mike *

@Kaj: Years ago I gave take-homes in classes like 4010 and 4220.

Kaj Hansen

There's no doubt the 4010 exam was worse than Graham's 4 and a half hour final.

shudders

Ted Shifrin

LOL ... Not nearly so bad as you're imagining.

If you look at my finals objectively, they're not unfair at all ...

Just every one else has wussed out ... :( More rationale to retire.

Mike Miller

Does this question have anything to do with conformal geometry?

I can't make it out it's asking, so I'm not willing to admonish the OP.

Kaj Hansen

3:30 AM

I agree. The 4250 exam could've been a LOT worse. And I did pretty well on the 4010 test...it was just a long.

Mike Miller

Because who knows, maybe it's actually about conformal geometry.

Kaj Hansen

it was just long**

Ted Shifrin

People confuse conformal mapping (appropriate) with conformal geometry (diff geo). Is there a conformal mapping tag? @Mike

Mike Miller

What does that question have to do with conformal mapping?

Pedro Tamaroff

It drives me crazy how all your courses have numbers.

Alexander Gruber

3:33 AM

@TedShifrin one of the advantages of the diamond is my students are afraid to post my questions on here.

Ted Shifrin

A lot of PDEs are solved by conformally mapping the domain to a standard one ... I didn't read the problem.

Mike Miller

I couldn't read the problem.

Alexander Gruber

@PedroTamaroff i know right? they assigned me "MAC1140" when I first got to UF and it took me several days to figure out what the hell that was.

Mike Miller

it appears to be pre-calculus and algebra.

Ted Shifrin

@Pedro: At MIT even the departments have numbers. Math is 18.

Pedro Tamaroff

3:34 AM

@AlexanderGruber My courses have names, like "Analysis I", "Advanced Calculus", "Complex Analysis".

It isn't even that hard!

Kaj Hansen

@Mike, whatever "precalculus" actually is...

Mike Miller

@KajHansen it's usually "what is a function? what is an inverse of a function? what's a polynomial and what are its roots? what are some tools for factoring and finding rational roots?" sometimes it even includes "what's a limit?"

Ted Shifrin

florida is bothersome because of two different math prefixes. When I was Assoc Head it drove me nuts.

Alexander Gruber

@PedroTamaroff at my old uni we had course numbers with course names, but we referred to them by the names and just used the numbers for registration. Here we still have both but everybody calls them by their numbers.

Mike Miller

usually, in my experience, students leave knowing none of the above

Ted Shifrin

3:35 AM

We have names, too, @Pedro, geez.

Mike Miller

mine's Mike

Kaj Hansen

It's always just struck me as a nebulous term.

Ted Shifrin

It's background you need for calculus, @Kaj.

Pedro Tamaroff

@TedShifrin Like knowing how to add and subtract.

Mike Miller

no, @PedroTamaroff, precalculus assumed that

as it turns out assuming students know how to add and subtract is dangerous indeed

Pedro Tamaroff

3:37 AM

At this pace we'll have pre-precalculus in no time.

Alexander Gruber

@TedShifrin oh there's even more actually. we have MTG for topology MAC for precalc/calculus/etc MAA for analysis MAD for algebra MAP for applied math and probably others

Pedro Tamaroff

Reminds me of...

►

Mike Miller

alex is MAD and he wants everyone to know it

Pedro Tamaroff

"Pre warm up, post work out."

Alexander Gruber

@MikeMiller you're goddamn right.

@PedroTamaroff i'm likin' them groovy pushups.

Ted Shifrin

3:40 AM

Oh, @Alex, I saw only core level!

Pedro Tamaroff

IN-DEED-

Ted Shifrin

@alex: You feeling better?

Alexander Gruber

@TedShifrin a little. They put me on drugs.

Ted Shifrin

Agh.

Alexander Gruber

I guess they're going to give me some kind of injection in the back of my head that will fix it for a while.

Ted Shifrin

3:43 AM

I hardly took codeine after my major surgeries ...

Pedro Tamaroff

@AlexanderGruber Why?

Ted Shifrin

Damn, @Alex. I hope this will get better.

Alexander Gruber

@TedShifrin it's tramadol, which is not quite so potent. (non-addictive, I guess)

@PedroTamaroff I have a bunch of herniated discs from my whiplash injury last Halloween

Pedro Tamaroff

@AlexanderGruber And are you looking forward to surgery?

My father had one, and it hurt like hell.

Mike Miller

you know what hurts? gall stones

Alexander Gruber

3:47 AM

@TedShifrin yeah that'd be good. I'm a pretty physical person so it'd be pretty not good if it didn't get better. i'm into weightlifting and play rugby, neither of which are real compatible with neck injuries.

@PedroTamaroff sooner it's over the better, i say

long as the surgeon doesn't mess up

Ted Shifrin

Are they planning surgery, then, @Alex?

Kevin Driscoll

Ah sorry to hear that Alex

Mike Miller

@PedroTamaroff What you wrote does not obviously show that $\sin$ is surjective.

Ted Shifrin

Agreed.

Eschew splitting into real and imaginary parts!

Thanks again, @Alex. I look forward to a resolution :D

Alexander Gruber

@TedShifrin I'm not sure. I think they're waiting to see what happens.

Ted Shifrin

3:54 AM

For your health, I'll cross fingers, toes, and other things.

Alexander Gruber

thanks.

and thanks to you too @Kevin

Mike Miller

is this nonsense? (i.e., unsalvageably so)

Ted Shifrin

@Mike: Stop stalling and do your exercise.

Kevin Driscoll

@Mike I'm stalling as well.

I'm supposed to be writing my Research Statement. Instead I'm talking with the gf on the phone.

Pedro Tamaroff

@KevinDriscoll I'd rather talk with gf on the phone.

Here comes a gf

Ted Shifrin

3:57 AM

I'm outta here. G'night alll.

Pedro Tamaroff

$\sum x_n x^n$

Mike Miller

@TedShifrin I'm still recovering from the deepseated depression you induced.

Pedro Tamaroff

Now no one likes exgfs
$\sum x_n x^n/n!$

Mike Miller

I hate your jokes more than I hate exponential generating functions.

Ted Shifrin

Wait for the faculty in grad school, @Mike. I'm a teddy bear.

AWertheim

3:58 AM

Goodnight, @TedShifrin!

Ted Shifrin

Night, @AWertheim

Kevin Driscoll

@Pedro Generating function!? facepalm

Mike Miller

@TedShifrin Ah, but the problem is that I don't know anything, not your insults.

Ted Shifrin

Insults? You're as bad as the viral memes.

@Kaj: You shall be dead.

Mike Miller

@TedShifrin Well, the normal person's solution would be to start knowing things. But I've decided to become an economist instead. They can be bad at math.

robjohn

4:40 AM

@TedShifrin took me a minute to figure out what "wb" stood for. I checked my profile page from my phone, but I was not back to my computer, so I didn't see the message until later. :-)

@PedroTamaroff why do you say no one likes exgfs? They are just as useful as normal generating functions.

Kaj Hansen

What are exgfs @robjohn? Naturally, Google returns explicit results.

robjohn

@KajHansen exponential generating functions

Kaj Hansen

Ah, got it.

Kevin Driscoll

@Robjohn we use exgfs for quantum field theory, though we just call htem generating functions

well technically theyre generating FUNCTIONALS

Bananarama

can someone help me check this? the bounds don't seem to match up math.stackexchange.com/a/839251/33907

they seem too lose to be good

Martin Sleziak

5:37 AM

@lyme The messages on this topic are so spread in the transcript of this room over several pages, so I created a new room, so that a conversation about this is feasible.

Martin Sleziak

5:54 AM

Is room info and transcript displayed normally for you?

Martin Sleziak

6:30 AM

Now even the chatroom is displayed strangely.

It is displayed like this for me: i.stack.imgur.com/LFkSi.png

Mike Miller

For me looking like that is a sign of a poor internet connection

Martin Sleziak

Now it looks normal again.

Thanks for the reply, Mike; I asked basically to know whether I am the only one experiencing this.