Mathematics - 2014-10-25 (page 3 of 5)

@Sawarnik: Think of it like a physics practical experiment. The Aim is something you know. The Requirements are: The process takes 7 days, requires a well, an integral snatched from Chris's sis, the eye of newt, sweat of ox, a demonic pentagonal star and Jigoku Shoujo dressed as the Ring girl. The procedure is something I cannot reveal. The result is left to your imagination.

Balarka Sen

6:15 PM

@G.T.R Such olympiadish. You can just use a program, you know. Just $10^4 - 10^3$ cases to check.

Sawarnik

@Nick You mean you know?

:D :D

G.T.R

@BalarkaSen it should be done in less than 3 hours, no computers allowed

r9m

@BalarkaSen lolwa to that ..

Sawarnik

@G.T.R Balark won't like that^ :P

Balarka Sen

@G.T.R OK, then it is an olympiad problem turns away

Sawarnik

6:16 PM

see

@Nick Are you any good at stalking @Huy ? :D

Balarka Sen

@r9m PARI can do it in seconds

Sawarnik

@BalarkaSen Not computers.

Balarka Sen

Hello @TedShifrin

Ted Shifrin

@GTR !!! Salut!

hi @Balarka

Sawarnik

@Nick Can you ask Balarka if I am on ignore?

Nick

6:17 PM

@Huy: Are you a hot teenage girl who can tutor me in Vector Algebra?

r9m

@BalarkaSen ofcourse .. but we are talking about using computers to check olympiadish questions .. (lolwa)

Sawarnik

@r9m thanks :)

Huy

@Nick: Yes. Asl?

Ted Shifrin

puts everyone on ignore

Nick

@BalarkaSen will never ignore @Sawarnik

Sawarnik

6:18 PM

You sure? How?

r9m

@TedShifrin hello professor :)

Ted Shifrin

hi @r9m

Balarka Sen

No, @Nick. He is on ignore forever.

I can't stand someone more obnoxious than me.

Ted Shifrin

Now you know how we feel, @Balarka.

Sawarnik

@TedShifrin Wait everyone was on ignore?

r9m

6:19 PM

@BalarkaSen blud !!

Nick

@BalarkaSen: I'm ok, right?

Balarka Sen

@Nick You're not obnoxious. Well generally.

Sawarnik

@Nick See :((

G.T.R

@Ted Salut, j'ai vu ton derniers cours sur les 4 espaces vectoriels fondamentaux apparaître dans ma "My subscriptions" sur Youtube

Ted Shifrin

C'est pas épatant, @GTR :)

Nick

6:20 PM

@BalarkaSen: ... really? Then, what am I? (in one word)

Balarka Sen

@TedShifrin So you agree that you are obnoxious to some extent?

Sawarnik

Googles define obnoxious.

Ted Shifrin

no, @Balarka, I agree that you are totally obnoxious

Balarka Sen

@TedShifrin Oh. I know that.

Sawarnik

@TedShifrin true :D

Daniel Fischer

6:21 PM

Bonjour @Ted.

Balarka Sen

But that guy Sawarnik annoys people.

Ted Shifrin

I think I'm remarkably patient around here

Sawarnik

@r9m How did you manage to become a friend on FB? :D

Ted Shifrin

Guten Abend, @DanielF

Nick

I agree that half the people in this room are egomaniacs :D

4

Sawarnik

6:21 PM

^

r9m

@Sawarnik from G.T.R's friend list ! istalked =P

Sawarnik

@BalarkaSen $$\huge{:(}$$

@r9m No well, Ted :D :O

Ted Shifrin

Il me semble que @GTR ait trop d'amis :)

Sawarnik

@r9m Can you stalk Huy btw? :P

MickLH

@Nick As long as we're all comfortable with who we are and proud of what we do right?!

r9m

6:23 PM

@Sawarnik y ?

Ted Shifrin

well, I'll come back when some math is going on ...

Sawarnik

@TedShifrin bye :)

G.T.R

@Ted proving $C^0(\mathbb R)$ is infinite dimensional is really cool

Sawarnik

you mean..i should go?

Ted Shifrin

@GTR: I'm gonna talk for a day about Fourier stuff at the end of the course. I think I'll have time.

Nick

6:24 PM

@Huy: ... dude, I was trying to a prove a point. Now, take that last thing back.

Daniel Fischer

@G.T.R Why? Which proof do you find the coolest?

Huy

@Nick: ASL?

Ted Shifrin

I gave the obvious, insipid argument, @DanielF

G.T.R

@Sawarnik I don't have you as friend on Facebook, but I did find your profile some time ago

Sawarnik

@G.T.R Oh wow, how was me? :)

Daniel Fischer

6:25 PM

@TedShifrin Polynomials?

Sawarnik

Let me find you...

Nick

@MickLH: 50% is a large population... if you get what I'm saying.

Ted Shifrin

Yup

G.T.R

@Sawarnik young, short

Sawarnik

:D

Ted Shifrin

6:25 PM

They were already mind blown that a point could represent the entirety of a function, @DanielF :P

And, no, I didn't mention that with discontinuous functions one doesn't have a Hausdorff space :P

Daniel Fischer

@TedShifrin Then showing that the restriction $C(\mathbb{R}) \to C([0,1])$ is surjective and $C([0,1])$ is not complete in the $L^1$-norm is probably not what you're going to do next time.

Ted Shifrin

LOL, no, not with mostly freshmen ...

G.T.R

@Ted are you familiar with $\sigma$-algebras ? I remember you mentioned you'be teaching probabilities this year

Ted Shifrin

But there will be a challenge problem soon using $\ell^2$ to see that $V^{\perp\perp}$ needn't be $V$.

G.T.R

@Ted that is very classic :P

Ted Shifrin

6:28 PM

I'm teaching undergraduate probability, @GTR ... no measure theory whatsoever. But I used to know some of that stuff ... never my favorite. But DanielF knows it all.

Of course, @GTR.

Sawarnik

@G.T.Rc Will you send me a friend request :D

Nick

@MickLH: psst.. I'll let you on a little secret, anyone and everyone can be termed as "liars, egomaniacal narcissists, hypocrites, etc." and it wouldn't technically be untrue because we are human beings and those qualities are a normal and natural behavioural response to certain situations we find ourselves in. Ultimately, we all just want to be loved and trusted.

Sawarnik

True.

MickLH

@Nick That's sortof touching on my humor :D

Ted Shifrin

ok, I'm outta here ... Learn well.

MickLH

6:29 PM

peace

Nick

Heal the World, brothers and sisters.

Semiclassical

That human beings are capable of being rational and wise doesn't imply we're very good at it in practice.

Nick

Elvis has left the building

Sawarnik

@Semiclassical Except Nick.

r9m

@Nick summons a priest .. wololo wololo (play aoe ?)

G.T.R

6:32 PM

@Ted but will you do some Baire ? Proving $R[X]$ has no countable basis is cool as well

@Sawarnik let me search my activity log

Sawarnik

@G.T.R easier to search my name :D

G.T.R

I can't remember

Sawarnik

@r9m Will you tell my fortune?

Nick

Jack can sing well but he can't dance. Jack is a failure because he can't dance but @Sawarnik only sees that Jack can sing. In this happy feet world, dancing is crucial.

Sawarnik

facebook.com/sawarnik.kaushal

r9m

6:34 PM

@Sawarnik kya ? kaise ?

Sawarnik

@r9m The priest.

Nick

@r9m: Nah, Age of Empire is too time consuming. I once played Virtual Villagers for 4 months straight when I was 8.

Sawarnik

@Nick :D

Nick

I'll never go back to gaming :|

Huy

@Nick: AoE is awesome though.

Sawarnik

6:35 PM

@Nick I have played Age of Empires too .. it used to be awesome :) :D

And I'll never go back to gaming as well :| :|

r9m

AOE is awesome .. !!

Sawarnik

Definitely..!

@G.T.R You look smart :D :D

Nick

$\text{awesome} = \frac{1}{2}\text{awful}$ ? Sounds to me that the word awesome just means not very bad.

r9m

@Sawarnik hehe .. TRUE !!

Sawarnik

@r9m :D

$\text{awesome} = -\text{awful}$

I think I started using awesome everytime due to Kung Fu Panda :D :D

G.T.R

6:38 PM

MickLH

yessssss

Sawarnik

Does anyone know about pawel kuczynski though?

Nick

@Sawarnik: $\text{awesome} = -\text{awful} \implies \text{boring} = 0$

@G.T.R : Tetris, yay!

Sawarnik

You need to look at his drawings..

@Nick Yay too!

pawelkuczynski.com/index.php

news.distractify.com/culture/satirical-paintings/?v=1

Huy

@Sawarnik: Aren't you like, 14? How can you have played AoE? Did you start gaming at age 6?

Sawarnik

6:43 PM

@Huy I have .. and I used to liked it.

Huy

@Sawarnik: I hope my children won't do that.

Sawarnik

Well not sure, but I think I was about 8 :/

@Huy True.

Balarka Sen

@G.T.R Isn't that patently obvious?

Sawarnik

But thankfully I didn't got addicted to gaming.

@Huy Do you think I am obnoxious?

r9m

.. didn't get

Huy

6:44 PM

@Sawarnik: Why thankfully? Maybe you were to become a professional gamer.

G.T.R

@BalarkaSen depends on your standards

Sawarnik

@Huy Nah ... too risky :P

You played some yu hi oh thing right?

Huy

@Sawarnik: Just for fun.

Sawarnik

But became a payed journalist.

Nick

Yu Gi Oh! It's like Backugon but with cards instead of balls.

Huy

6:46 PM

Well, who would say no to lots of free money.

Sawarnik

For free?

Huy

I didn't pay for any of it.

r9m

gets bored and goes back to watching old Sherlock Holmes .. cya

Balarka Sen

Wait a sec @G.T.R. $R[X]$ has a countable basis over $R$. The canonical $\{1, X, X^2, \cdots \}$

Sawarnik

@Huy I meant you got payed for it!

Huy

6:47 PM

@Sawarnik: I know, right?

Sawarnik

@r9m haha .. i don't have those :( .. so I have to be satisfied be the new one :(

@Huy But few are so lucky [or talented].

Huy

@Sawarnik: [or both]

Sawarnik

Hmm.

Balarka Sen

Is this seriously a math chat room anymore?

Huy

@BalarkaSen: Did you listen to Taylor Swift's most recent album yet?

Sawarnik

6:51 PM

@BalarkaSen Nah!

Balarka Sen

@Huy Who the heck is Taylor Swift?

Sawarnik

@Huy lol .. best reply!

@BalarkaSen You know. Don't act innocent.

barznjy

Hi everyone

Huy

@BalarkaSen: Just some girl. You don't know much about them, do you? :(

Balarka Sen

@Huy Huh?

Sawarnik

6:51 PM

@barznjy hi

@Huy He does.

Balarka Sen

I don't get it.

Huy

Hi, @barznjy.

@Sawarnik: No, he doesn't. ;-)

Balarka Sen

Something tells me I should not google.

Sawarnik

@Huy Well.

barznjy

I have asked a question about the exponential integral function, but till now I don't received any answer. How I find someone who is specialist in applied mathematics?
here is the link of the question http://math.stackexchange.com/questions/985962/manipulating-constants-inside-the-exponential-integral-function

Sawarnik

6:55 PM

What kind of comment is this: math.stackexchange.com/q/990689/#comment2027545_990689 !

Balarka Sen

Funny enough, this also gives a closure to the set of square integers, which is pretty nontrivial to prove ;)

Daniel Fischer

@Sawarnik Well, you've seen who, haven't you?

Sawarnik

@DanielFischer I know, but its still odd :/

Daniel Fischer

@Sawarnik "Odd" is one of the better things we could say about him.

Sawarnik

True :D

Balarka Sen

6:59 PM

Apparently Dr. Sonnhard has multiple accounts, but he forgot to use the other one when writing the comment

Semiclassical

@barznjy: my immediate reaction is that there's not a lot of context to draw people's interest. The lack of clear dfns and intentions moreover makes it unclear what you're asking

Sawarnik

@BalarkaSen I thought the same thing too.

Yay, I am unignored :D

Ok, I have to go .. byes :D

barznjy

@Semiclassical In fact if the constant part can comes out from the function part, then the manipulation of the exponential integral function becomes much easier

@Semiclassical I know it is a specific question, but this is what I face, I am now struggling in that ..

Huy

@barznjy: What exactly do you mean by "seperate the constant term from the function"?

barznjy

@Huy take it out i.e. E_n(x+c) make it E_n(x)

Huy

7:08 PM

@barznjy: Are you sure it's possible?

barznjy

@Huy No, I am looking for the possibility of doing that

Huy

@barznjy: Good luck.

r9m

@Chris'ssis $$\Large \text{YESSS !!!}$$

barznjy

@Huy I rephrased the question as the following;
Is it possible to take out a constant part from the function? If yes, How?

G.T.R

@BalarkaSen of course, I wanted to say that $R[X]$, as any space with a countable basis, is not complete (whatever norm you may try)

Balarka Sen

7:14 PM

oh. that is indeed nontrivial to me, not to mention interesting

i am just studying topology in fact

I was going through the starred post and oh my god

yesterday, by robjohn

Not Ted Shifrin

38 5

LOLOLOL

Oh and here is your Lee, @Jasper : math.stackexchange.com/users/1421/jack-lee

G.T.R

@BalarkaSen any topology-related facts you deem interesting to mention ?

Balarka Sen

@G.T.R sure.

r9m

@robjohn fantastic answer here !! :D I like !

Chris's sis

@r9m More or less, they are like Inna (see here an "example")

►

:D

Balarka Sen

Contour integration is the natural way to proceed, IMO

G.T.R

7:28 PM

@BalarkaSen unless I suck at programming, the earlier equation has no solution

Balarka Sen

@G.T.R Very well.

r9m

@Chris'ssis hehe :P :D

Chris's sis

@r9m Many of them take very good positions in large companies here, I mean they are very competent. Some people from other European countries make all kind of statements about us ... but we rule ... (very smart and very nice girls here)

r9m

@Chris'ssis good good !! :-) ..

@Chris'ssis smart and nice girl .. !! that's an ultra rare combination in India, very hard to come by ! :P

Balarka Sen

Nobody talks nice with you @Sawarnik

Sawarnik

7:38 PM

@BalarkaSen Well, not quite.

Balarka Sen

Well, Nick and Jasper are nice with everyone.

Chris's sis

@r9m don't you like the girls from your country? :-)

Sawarnik

@Balarka 's really angry wimme, what is the matter? :O

@Chris'ssis Interesting question.

Chris's sis

@Sawarnik :D

Pedro Tamaroff

@DanielFischer

Balarka Sen

7:39 PM

OK, that reminded me of @Pedro's exercise.

Pedro Tamaroff

Do you know a book with exercises on Complex Analysis? Remmert has few exercises.

Sawarnik

@BalarkaSen And many more.. :P

Pedro Tamaroff

@BalarkaSen So, what did you deduce negating the thesis?

Alyosha

How do you prove that fiber products are universal?

Sawarnik

@Alyosha Hey :)

Alyosha

7:40 PM

Hello.

Balarka Sen

@PedroTamaroff Haven't tried yet. Very pressed with high-school stuffs.

Let's see.

Pedro Tamaroff

@BalarkaSen Really? Is memorizing all the capitals in the world such a bugger?

Daniel Fischer

@PedroTamaroff Ahlfors also has few exercises (but most of them are good). Rudin (RCA) has many, Fischer/Lieb has many. Stein/Sharkachi (or however that one is spelled) also seem to have many.

Sawarnik

@r9m Hmm... I should send you to my class you ll get some nice beating and slapping there :D :D :D

Balarka Sen

@PedroTamaroff No, but memorizing all the names of the damned Vitamins are.

r9m

7:41 PM

@Chris'ssis well I have never met anyone form Romania personally .. and pics in internet always turn inadequate (in reality people look much better than how they look on 2d pics :-) .. )

Balarka Sen

And works. And sources. So on and so on.

Pedro Tamaroff

@BalarkaSen You just have the know the goddamn ABC!

Balarka Sen

@Alyosha ?

2

Alyosha

Yes?

Pedro Tamaroff

Vitamin A, B, C, D, E, F....

Sawarnik

7:42 PM

They have names as well..

Balarka Sen

What @Sawarnik said

Chris's sis

@r9m True. The best way is to visit the country. ;)

Alyosha

I rather lazily asked the question so it could be obvious.

Balarka Sen

Pantothenic acid and whatnots

Pedro Tamaroff

@BalarkaSen So, deduce stuff!

Balarka Sen

7:43 PM

@Alyosha Click the question mark

It's a link

Alyosha

@BalarkaSen Oh, very good.

Sawarnik

Hmm @r9m

Alyosha

Category theory things have weird names.

r9m

@Chris'ssis I always wanted to visit an European Country ! :-) wanted to see first hand how 1st world countries look like in reality ..

Balarka Sen

Fiber products sure seem quite internationally exported. Not sure about universal.

Alyosha

7:45 PM

No, you are forgetting about the uniqueness of the export.

Chris's sis

@r9m I don't think it would be a big problem to visit these countries, or? (well, some of them)

Sawarnik

@BalarkaSen But you can get them anywhere, no need to get exported.

r9m

@Chris'ssis It would be a waste if I were to visit as a tourist ! (best if I got a project/internship some time !! :-) .. but that's hard to get )

G.T.R

@Alyosha Hey, how is university ?

Sawarnik

@r9m Why waste of time? :O O

Alyosha

7:47 PM

@G.T.R Hello. It's quite busy. How are you?

r9m

@Sawarnik and resource .. I'm not a very rich guy :|

Chris's sis

I knew a girl that visited India, she was a Christian and went there to spread the gospel, stayed there for 2, 3 months or so ... (I saw some nice pictures from there)

Sawarnik

@r9m Yes, this definitely.

@Chris'ssis Which place? :)

Chris's sis

@Sawarnik I don't remember ... (that was like 2 years ago or even more)

G.T.R

@Alyosha I'm struggling with probabilities and Python, but otherwise everything's fine

Sawarnik

7:49 PM

Ok :)

Alyosha

@G.T.R We don't have to learn programming, though I am trying C++.