Mathematics

Committing to a challenge

12:00 AM

Click on my Identicon and see ;P

I can't chat at uni though, so I won't be here for a few days

I can't be at home for a few days, so I will just sleep at the desks

Twink

on your what?

Committing to a challenge

On my equivalent of your upward rainbow face picture

<----This teal picture

<-
|
|

Byeeee~~~~~~~

Twink

bye @Committingtoachallenge

Chris's sis

@robjohn Oh. Why was it closed?

Twink

@Chris'ssis did't you say that you'd never come back as a protest?

Mary Star

12:11 AM

@DanielFischer And how could we prove that the algorithm does what it is meant to do??

robjohn

@Chris'ssis people think it was a duplicate, which it was not. I posted a request to reopen.

Chris's sis

@Twink Did I say that? I don't remember.

Twink

or someone said you said that

something like that, I don't remember

Chris's sis

@robjohn I see.

robjohn

@Chris'ssis The part of my answer that answers the other question is not a duplicate of the one complete answer there, so I could post that part there, but it does not show how to get from the closed question to the "original" question. My answer does.

Twink

12:14 AM

hi @Pedro

Chris's sis

@robjohn OK

Warm Fuzzies

one more reopen vote, please

Twink

@WarmFuzzies where do I sign?

Pedro Tamaroff

@WarmFuzzies That has been asked before.

Why open it?

Twink

@PedroTamaroff maybe he's not satisfied with the answers of the other question

I don't find the "reopen" option

Mike Miller

12:22 AM

@Pedro are you really suggesting that Riemann thought about the zeta function before Euler?

Really?

Pedro Tamaroff

Are you mad Mike?

Why do you hate me?

Twink

@PedroTamaroff why are you ignoring me?

Pedro Tamaroff

Why do you hate everybody, Mike?

Twink

you hate ME

Pedro

that's why you ignore me

why are you so upset?

....

I feel so ignored :(

teadawg1337

I'd just like to point out that Euler died before Riemann was born....

Runs to avoid the crossfire

Pedro Tamaroff

12:29 AM

@teadawg1337 Yes, I know I'm wrong. I was just taunting Mike.

Twink

@teadawg1337 can you please ask Pedro why is he ignoring me? :(

Pedro Tamaroff

@Twink Hello there.

You were whining too much some days ago.

teadawg1337

@Twink I don't see him ignoring you right now :P

Twink

@PedroTamaroff but we talked just yesterday

and you were not ignoring me

Pedro Tamaroff

OK, yesterday.

You were whining too much.

Twink

12:34 AM

was I?

Pedro Tamaroff

Yep.

teadawg1337

Holy crap, my topic is the third result if you google "basel problem dilogarithm"

Mike Miller

@Pedro It's easy to hate you. For starters, you smell bad.

Pedro Tamaroff

@MikeMiller I smell amazing.

Twink

@PedroTamaroff I'm sorry :( I did't realize I was. We were just talking about the questions of my exam, I don't understand why you say that.

teadawg1337

12:44 AM

Yesterday, it was the fourth result. #movingup

Twink

@PedroTamaroff Do you think I'm obnoxious? :(

Pedro Tamaroff

@Twink Why are you asking me this?

Twink

Because you were ignoring me..

evinda

Hi :)

If $F(x,y,z) \in \mathbb{C}[x,y,z]$ is a homogeneous polynomial of degree $n$, prove the Euler's formula.

$$XF_X+YF_Y+ZF_Z=nF$$

We can show it like that, right?

Let $F(x,y,z)=\sum_{i+j+k=n} a_{ijk} \ x^i \ y^j \ z^k$
$$F_x(x,y,z)=\sum_{i+j+k=n} a_{ijk} i x^{i-1} y^j z^k$$

$$xF_x(x,y,z)=x\sum_{i+j+k=n} a_{ijk} i x^{i-1} y^j z^k=\sum_{i+j+k=n} a_{ijk} i x^{i} y^j z^k$$

$$yF_x(x,y,z)=y\sum_{i+j+k=n} a_{ijk} x^{i}j y^{j-1} z^k=\sum_{i+j+k=n} a_{ijk} x^{i} j y^j z^k$$

$$zF_x(x,y,z)=z\sum_{i+j+k=n} a_{ijk} x^{i} y^{j} k z^{k-1}=\sum_{i+j+k=n} a_{ijk} x^{i} y^j k z^k$$

But could you explain me why we choose such a polynomial that there is for example no constant term?

Pedro Tamaroff

No, no.

Don't do it like that.

Suppose that $f(tx)=t^n f(x)$.

Now differentiate both sides with respect to $t$.

Done.

Then set $t=1$.

You should get $x\cdot \nabla f(x)=nf(x)$. That's your equation.

Twink

12:47 AM

@PedroTamaroff you're so intelligent

teadawg1337

@Twink I think most of us here are fairly intelligent

Twink

@teadawg1337 I'm the only exception

teadawg1337

@Twink Maybe, maybe not. I don't know you well enough to judge

Pedro Tamaroff

@Twink Yes. You're a lost cause.

Mike Miller

I think most of us are quite dumb.

I don't know much anything.

Twink

12:51 AM

@PedroTamaroff I know :(

:'(

Lonely, I'm mr. lonely, I have nobody :'(

teadawg1337

@Twink Mr. Lonely, you say? I'm always lonely

Twink

@teadawg1337 I'm lonelier

FreeMind

@robjohn Is there any way to talk to you privately?

Pedro Tamaroff

@FreeMind IRC, perhaps.

FreeMind

@PedroTamaroff What channel pedro?

Pedro Tamaroff

1:01 AM

@FreeMind Dunno, you should create it.

FreeMind

@PedroTamaroff Is Robjohn in IRC?

Pedro Tamaroff

@FreeMind I don't know. Ask Rob. =D

FreeMind

@PedroTamaroff I asked :) but YOU answered :D

robjohn

@FreeMind I can create a private room, but it is not private from other moderators. We are only supposed to do this in dire circumstances, however.

FreeMind

@robjohn Please come to channel #physmania if you are willing to dedicate some of your time to me.

@robjohn Physmania channel in IRC freenode

robjohn

1:04 AM

@FreeMind I don't know what that means... Ah, I don't have an IRC client.

FreeMind

@robjohn Ah :|

@robjohn Are you willing to create one?

It does not take lots of time!

it's just a matter of setting up an application then running a command and you're done!

Twink

@FreeMind Why do you wanna tell him that we cannot know?

FreeMind

@Twink If I wished to tell it I would tell it!

teadawg1337

I JUST noticed a tiny error in my huge answer...

A single missing negative sign...

robjohn

@teadawg1337 that's always annoying

teadawg1337

1:20 AM

@robjohn It makes me super irritated, because I've been re-reading it over and over again and I just noticed it...

Kaj Hansen

@Committingtoachallenge, have you been basking in lots of new music?

evinda

I want to find the discriminant of $g(x)=X^3+pX+q$.

$$Res(g,g')=(-1)^{\frac{3(3-1)}{2}} D(g(X)) \Rightarrow Res(g,g')=-D(g(X))$$

$$Res(g,g')=det\begin{bmatrix}
q & p & 0 & 1\\
0 & q & p & 0\\
p & 0 & 3 &0 \\
0 & p & 0 & 3
\end{bmatrix}=(-1)\begin{vmatrix}
0 & q &p \\
p & 0 & 3\\
0 & p & 0
\end{vmatrix}+3\begin{vmatrix}
q & p &0 \\
0 & q & p\\
p & 0 & 3
\end{vmatrix}=9q^2+2p^3$$

Have I done something wrong?

FreeMind

@robjohn So How can I reach you outa here?!

teadawg1337

1:50 AM

OMFG, I FOUND ANOTHER ERROR! UUUUUUUUUUGH

Pedro Tamaroff

@teadawg1337 Maybe you should proofread your answers before posting them.

teadawg1337

@Pedro I did, but it was around 10:00 or so when I posted

Pedro Tamaroff

@teadawg1337 Why should time be relevant?

teadawg1337

@Pedro idk, I was making an excuse :(

Ugh, this is so embarrassing.....

AWertheim

Hello friends. :)

teadawg1337

2:00 AM

My proof is still correct, I just copied a few things down wrong. I'm really irritated right now, though....

@AWertheim Hello

@Pedro Considering it was the first "formal" proof I've ever written, I'd say I did a fantastic job only making a few copying mistakes.

Pedro Tamaroff

@teadawg1337 Link?

teadawg1337

@Pedro Here

Pedro Tamaroff

@teadawg1337 OK, that's an authentic TL;DR.

=D

teadawg1337

@Pedro Ouch...

It took me a day and a half to format with MathJax... It would've taken at least a week on Google Docs

The raw text pasted into Word is three pages of MathJax, and the edit box is seemingly a mess. I could afford to make four mistakes...

Ugh, I'm getting a headache just scrolling through the wall of MathJax...

I hope I don't ever have to write an answer that long ever again.

Anyways, it's been a long day. I'm heading off to bed, g'night everyone

Pedro Tamaroff

3:04 AM

@KarlKronenfeld Well hello there.

Karl Kronenfeld

@PedroTamaroff Oh hi

hi @Ted

@PedroTamaroff how's it going?

Pedro Tamaroff

@KarlKronenfeld Not bad. Finishing second year, almost. =)

Karl Kronenfeld

@PedroTamaroff I'm doing last minute revisions on a research paper.

Pedro Tamaroff

@KarlKronenfeld That's nice.

Karl Kronenfeld

Basically the end of the semester here too

Pedro Tamaroff

3:09 AM

Ya'll grownups doing research.

And I'm just here.

@KarlKronenfeld What is it about?

Karl Kronenfeld

@PedroTamaroff Why conspiracy theories spread, mostly focused on the United States though a lot of it should apply elsewhere.

Pedro Tamaroff

@KarlKronenfeld That's curious. I'd expected it to be mathematics.

Karl Kronenfeld

I can have fun too

Pedro Tamaroff

@KarlKronenfeld What course is it from?

Yes, conspiracy is fun.

Ted Shifrin

Hi @Karl @Pedro

Pedro Tamaroff

3:23 AM

@TedShifrin Hi. I have to go, I have a midterm tomorrow morning.

Ted Shifrin

Do well!

Pedro Tamaroff

Is that an order?

I cannot go Last Boy Scout on this, you know.

Ted Shifrin

Huh? Go!

Mike Miller

hola

AWertheim

3:50 AM

Hello again!

Anonymous

4:30 AM

@Chris'ssis Make us see the art that you in the integrals in your new book!!!!

Anonymous

@TedShifrin Are you good at solving those monstrous integrals?

Zach Saucier

my goodness

@Ted I still can't get this problem correct

keep getting $10\pi$

I did all the rest of the homework xD

Zach Saucier

4:52 AM

@Ted Finally got it... Changed my approach completely about 4 times

Kaj Hansen

5:13 AM

@ZachSaucier, what are you looking at?

Oh, nvm. I see you figured it out haha

Twink

5:35 AM

:'(

u.u

Anonymous

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$Mathematics$ Mathematics