Mathematics - 2014-11-18 (page 4 of 4)

UserX

23:00

I'm confused on neighboorhoods and limit points.

Ted Shifrin

you don't want neighbors, anyhow, @UserX

UserX

@TedShifrin If a neighboorhood can be made arbitrary small, why isn't it a tautology with limit points?

Ted Shifrin

huh?

UserX

A neighboorhood is a set around a point of another set that's included in the set

Ted Shifrin

@UserX, sorry, but it is getting worse.

Hippalectryon

23:02

@UserX I wish I could reduce my neighbors sometimes ... :/

Ted Shifrin

I would have thought all your neighbors would have fled to another country, @Hippa.

Hippalectryon

@TedShifrin They don't need that to flee France :c

Ted Shifrin

well, it's more motivation, @Hippa.

Kaj Hansen

@TedShifrin, Chris wants to know what day the probability test is :P

Hippalectryon

@TedShifrin They don't know it, but I am the N1 cause of suicide

Ted Shifrin

23:03

Tell him to f*** off, @Kaj.

Kaj Hansen

LOL, sure thing

Hippalectryon

Uhm uhm uhm

UserX

@TedShifrin is that intuitive definition of neighboorhood BS?

Hippalectryon

@UserX As in Beautifully Stated ?

:D

@Rafflesiaarnoldii That question of the RH is pure stupidity

Ted Shifrin

@UserX: A neighborhood of $x$ is an open set containing $x$. $x$ is a limit point of a set $A$ if every neighborhood of $x$ intersects $A$ in some point other than $x$.

Hippalectryon

23:05

Same for the answers, and the comments all upvoted three times ... :/

Rafflesia arnoldii

@Hippalectryon Yeah, that was predictable. The SOW thing still needs one downvote before 20K users can vote to delete it. (Hint, hint)

Hippalectryon

I have already down/upvoted what was to down/up vote there :/

Mike Miller

@TedShifrin The hard part is that the upper triangulars are conjugate to any "nilpotent subspace" of maximal dimension, yes. My difficulty was that I saw a potential line of attack and it was the wrong one.

Rafflesia arnoldii

(Closed questions at -3 or less can be deleted without waiting 48 hours)

@Hippalectryon So did I.

Ted Shifrin

Yeah, @Mike, I thought something like that (plus arbitrary field). @Hippa was making a much weaker allegation.

Mike Miller

23:06

I know. I don't think I ever alleged that one should need the full power of that paper I linked!

Hippalectryon

Cuz i'm weak |﹏☉)

Mike Miller

I was just confirming the suspicions that the maximal dimension was the hypothesized one.

Ted Shifrin

vraiment, sans doute @Hippa.

UserX

@TedShifrin wait a sec. Don't we require neighboorhoods to be relatively small sets?

Ted Shifrin

nope, @UserX, although one usually has that intuition.

Hippalectryon

23:07

@TedShifrin cries in a corner

computes integrals while crying

Ted Shifrin

don't forget to explode your laptop while crying @Hippa

Hippalectryon

@TedShifrin Oh good idea !

Someone in this chatroom wants me dead. Can you find out who it is ?

Hint : he eats infants

Ted Shifrin

@Hippa, tu veux bien que je parte :)

Mike Miller

In retrospect, my line of attack would have given me the full result (in characteristic 0), so it was definitely working too hard no matter what.

It's me, @Hippa

Hippalectryon

@TedShifrin Nooon :/

@MikeMiller ┬──┬◡ლ(ಥಿAಥ ლ)

@TedShifrin You're probably (ie for sure) more useful here than I am :-)

Ted Shifrin

23:11

I'm tired of being useful.

Time for dinner ... have fun.

Mike Miller

See ya.

Hippalectryon

:-)

Mike Miller

Enjoy it, since I can't.

Hippalectryon

Maths are always fun

Mr Squer

Hi.

Hippalectryon

23:12

@TedShifrin Try to limit your food to a countable number of ingredients or you won't loose any weight :P

Mike Miller

Don't be mean, @Hippa

Hippalectryon

@MikeMiller I'm not being mean. He was talking about that some hours ago

I wouldn't say that out of the blues :/

Mr Squer

Has anyone here seen the movie Interstellar yet? (I am new here)

UserX

@TedShifrin say we got a closed set and an arbitrary element of that set. Can a neighboorhood of that element be the same set without boundaries?

Hippalectryon

@MrSquer Only the soundtrack :P

The soundtrack is good

Mike Miller

23:15

Yes, @MrSquer

Mr Squer

yea

listening to it now

youtube.com/watch?v=8DsrJ_NezHU is best imo

Hippalectryon

@MrSquer I prefer the mountains one

Mike Miller

@UserX I don't think I understand your question. But in an arbitrary topology, open sets can be very weird. I think you're learning from Wikipedia again and chasing down online links, which isn't going to learn anything in the end :)

Daniel Fischer

@MikeMiller Have you already done your duty on this Thierno M. Sow post?

Mike Miller

@DanielFischer Ages ago.

Find something you're interested in and learn it more rigorously from a book or good lecture notes!

Hippalectryon

23:16

@MrSquer youtube.com/watch?v=o_Ay_iDRAbc

Daniel Fischer

@TedShifrin Can we convince you to downvote the above?

UserX

@MikeMiller yup link vortex is engulfing me once again... I have read some basic topology from books though.

Mike Miller

@Daniel I asked a friend, I'll ping you when he comes through.

Daniel Fischer

@evinda Yes.

Mike Miller

There's no way the comment on the answer down below isn't breaking loads of rules, @DanielF

Daniel Fischer

23:19

@MikeMiller Misusing one of Einstein's (alleged) quotes?

Mike Miller

It's down to -3, can you kill it now?

UserX

Kill it with fire...

Mr Squer

@Hippalectryon What I really thought was interesting in the movie is how they wanted to send the human race to a planet near a potentially dangerous black hole :L

Daniel Fischer

@Rafflesiaarnoldii It's at -3.

@MikeMiller I've cast my vote, two to go.

Hippalectryon

@MrSquer I have no idea what happens in the movie :-)

Mr Squer

23:20

@Hippalectryon Oh, the human race is in a dust bowl sort of situation and they need to find a new planet for the human race (which is near a black hole)

Rafflesia arnoldii

Added mine. (I strategically left one delete vote in reserve today. :)

Daniel Fischer

@Rafflesiaarnoldii Well done.

UserX

Thierno M. Sow vs the world

Mike Miller

@MrSquer No spoilers for those who haven't seen it!

Hippalectryon

@Rafflesiaarnoldii Who is M.Sow exactly ?

@MikeMiller They all die at the end

@MikeMiller They meet Nyan cat in space

Mike Miller

23:24

I've seen it, @Hippa

Hippalectryon

@MikeMiller I haven't xD

Mike Miller

So it needs to have an aggregate of -3, or it needs to have a total of -7 downvotes, to get 20k deleted?

Victor

Anyone can answer this question? math.stackexchange.com/questions/1028372/…

Daniel Fischer

@MikeMiller Score of -3.

UserX

Rafflesia arnoldii

23:29

in Tavern on the Meta on Meta Stack Exchange Chat, Aug 20 at 2:58, by Shog9

@bjb568 xkcd oneboxes. Every time you post a cartoon without oneboxing, Jim Davis kills Garfield.

UserX

Coincidence should've been "correlation $\neq$ causation" but it's still funny

Hippalectryon

NOOO GARFIELD

Rafflesia arnoldii

'There's also a spike on the Fourier transform at the one-month mark where --' 'You want to stop talking right now.'

UserX

What's oneboxing?

Rafflesia arnoldii

^ there, saved him.

Hippalectryon

23:30

@Rafflesiaarnoldii I owe you one

Victor

Anyone have a graduate degree of math here?

UserX

I bet Ted does

Hippalectryon

Ted is away

Eating

@Victor I guess you can still ask and ping him

Rafflesia arnoldii

@UserX Oneboxing explained here

Hippalectryon

He might answer when he comes back

Victor

23:31

@TedShifrin - May you take a look of this question? math.stackexchange.com/questions/1028372/…

Hippalectryon

@Rafflesiaarnoldii Who is that Brown guy exactly ?

UserX

Mine seems oneboxed too lol

Hippalectryon

@UserX Garfield does not approve

Rafflesia arnoldii

@UserX No, it does not have title-text, for one thing. Takes a bit out of xkcd comics.

What Brown guy?

Victor

@Hippalectryon - Thank you, is that the Ted you are refer to?

Hippalectryon

23:33

@Rafflesiaarnoldii Sorry I meant the Sow guy

UserX

Ohhh I can onebox by linking directly the comic

Hippalectryon

@Victor I was referring to @TedShifrin

UserX

Real-life prospective-pairing curves over things like age can get depressing.

Mike Miller

hahah

Rafflesia arnoldii

No idea. I know there was a bunch of crankish posts with that name, and more recently a bunch of clones upvoting each other.

Victor

23:34

@Hippalectryon - Good, i pinged him!

Mike Miller

If your questions are about probability, I'm afraid Ted might not be the person to ask; he worked in geometry, and I think is learning probability this quarter.

Victor

@MikeMiller - Who are specialized in stochastic thing and probability?

Mike Miller

I dunno.

Hippalectryon

I could have asked my close friend G., too bed he died some days ago :PPP

UserX

How to avoid getting laid 101

Especially you mouseover-text readers. You're the best. <3

Mr Squer

23:40

illuminati

"Especially you mouseover-text readers. You're the best. <3" wat

Hippalectryon

:D

UserX

This one goes for @MikeMiller

The same goes for the one where you're wrestling the Green Ranger in the swimming pool full of Crisco. You guys all have that dream, right? It's not just me. Right?

And all his graduate peers

Mike Miller

Deleted my comment since your updated question addressed my complaint @Victor

Mr Squer

My father says he has those dreams... And he is old

Quick question; Does anybody else here program in C++ or use Blender to animate?

Hippalectryon

Garfield on the starred board e_e

I thought this was a math chat

Mr Squer

23:46

I was trying to change the subject :P

UserX

Good night people

Mr Squer

Good night.

Hippalectryon

Gn

Mr Squer

Just something I think you people should know, I am 11 years old.

So no explicit stuff please.

Vincenzo Oliva

Since everyone is posting images

(well, actually only UserX, it seems)

Is there anyone who would be so kind to see this trifle?

https://mail.google.com/mail/u/0/?ui=2&ik=c836c485c8&view=fimg&th=149c54eee945cb55&attid=0.2&disp=inline&realattid=ii_i2nwnrmb0_149c5488188b3ae3&safe=1&attbid=ANGjdJ9tcxLLM0g02mJaeoCB5A6xqMJJz_9JaqN61YeUSiBCBRDbgGvQTrCFXgAry0tP94Yz42c6iuTmtEjOqIvi3zhuXlDyhQMWmSNLyeg6vvX3aezmtJ0avQLFZFA&ats=1416354526169&rm=149c54eee945cb55&zw&sz=w1000-h523

Hippalectryon

23:52

Invalid link

Vincenzo Oliva

Jeez, just a moment

@Hippalectryon I improved the form of it.
It might still be wrong, in which case I'd like some one to point out the error, even because I should be sleeping but I won't, so I'm dying :v

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xfa1/v/t1.0-9/10733964_846741605388149_2186999661875403550_n.jpg?oh=b28a3f91535e308588da3f61c0ac8646&oe=54D40B3F&__gda__=1428030217_c8ee43dbf96102fc35f7742bda753be1

*someone

Hippalectryon

@VincenzoOliva What does $a\sim b$ even mean ? $\sim$ is used between functions

Pedro Tamaroff

HARRO PEEPS.

@DanielFischer

Today at Complex Analysis we saw the Weiertrass factorization theorem.

Pretty darn awesome.

Daniel Fischer

@PedroTamaroff It is.

Vincenzo Oliva

The problem is that it is a generalization of a situation $p_l \sim \log SA_m$, where $p_l$ is the largest prime factor of the m-th superabundant $SA_m$

@Hippalectryon

@PedroTamaroff Hey there.

Mike Miller

23:58

Hadamard factorization is slightly cooler, @Pedro. You should look it up.

Hippalectryon

@VincenzoOliva Oh I can' t help then

Pedro Tamaroff

@DanielFischer So we took $E_p(z)=(1-z)e^{z+\cdots+z^p/p}$ and showed that if $|z|\leqslant 1$, $|E_p(z)-1|\leqslant |z|^{p+1}$. And then everything went down swimmingly.

What's with the mod showdown?

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$Mathematics$ Mathematics