Mathematics - 2014-06-23 (page 3 of 6)

@AlexanderGruber a friend was a victim. the police caught the criminal and he is (to my surpise), a student at cambridge. since all cambridge students live in college, the university almost certainly know

@AlexanderGruber i wonder if he would be expelled...

N3buchadnezzar

4:30 PM

@AlexanderGruber That's a lot. 2,250mm here

Alexander Gruber

@Lost1 what exactly is the nature of the fraud? It matters whether it is civil or criminal fraud.

Lost1

@AlexanderGruber criminal.

Sawarnik

1127 here.

In the last, drier year.

Balarka Sen

Got disconnected.

Alexander Gruber

@Lost1 what happened? my apetite has been whetted.

@N3buchadnezzar that is a ton of rain.

N3buchadnezzar

4:32 PM

200 rain days a year, awwwyeah. Some parts of it is snow

Balarka Sen

It's already monsoon here.

Sawarnik

@N3buchadnezzar Aww.

Balarka Sen

Raining all the time.

Sawarnik

@BalarkaSen In Kolkata, but here :(

MrWho

@Alizter The part I needed you to use the notation I told you, you used newtonian notation ! I don't get this : $F'(v,x)=v'f(v,x)+f(v,x)$

Alexander Gruber

4:32 PM

it's also close to degrees at 85% humidity here

Sawarnik

It was still like 45 degrees when I was coming home.

N3buchadnezzar

@Sawarnik No problems. People here develop gills after a few years, or die.

3

Balarka Sen

@N3buchadnezzar And how do you work with no sun on the sky?

@N3buchadnezzar Heh.

Lost1

@AlexanderGruber long story short: he posed as a job agency and asked for a fee in return of introducing jobs. he forged emails from Goldman Sachs.

Sawarnik

@N3buchadnezzar Do you have gills?

MrWho

4:34 PM

The weather is extremely hot and humid, I'm dying because of mosquito(s) biting me every time :(

N3buchadnezzar

A tourist came to bergen, and it was heavilly raining. He asked a young boy: "Does it always rain here?" The boy answered: "Do not ask me I am only seven".

Sawarnik

@BalarkaSen Why the hell are you enjoying holidays hen its already raining?

MrWho

@N3buchadnezzar LoL

Alexander Gruber

@Lost1 i'm not sure how the international aspect of this would affect things but i imagine if you contacted the college's disciplinary committee that something would probably happen

N3buchadnezzar

@Sawarnik Aye aye captain

I live in a pineapple under the sea

MrWho

4:36 PM

@Alizter ?

Alizter

@MrWho Yes

@MrWho It is explained with what I showed above

Balarka Sen

@Sawarnik You don't want to know.

MrWho

@Alizter The part I needed you to use the notation I told you, you used newtonian notation ! I don't get this : $F'(v,x)=v'f(v,x)+f(v,x)$

Alizter

In our case the function $w$ is $F$ and $a(x)=u(x)$, $b(x)=x$

Sawarnik

@BalarkaSen True.

Lost1

4:37 PM

@AlexanderGruber i am planning to as soon as he is convicted. it is a shame he goes to the same university as me. much prefer if he went to oxford instead...

Balarka Sen

@N3buchadnezzar yellow submarine?

MrWho

@Alizter Show this in the notation I told you, $F'(v,x)=v'f(v,x)+f(v,x)$, and I'm done!

N3buchadnezzar

@BalarkaSen Spongebob?

Balarka Sen

@AlexanderGruber I am having a hard time with grombinatorics.

@N3buchadnezzar Ah, right right.

I forgot. Seen it ages ago.

Alexander Gruber

@Lost1 eh, send him over to america. we'll put him in an MBA program.

Hippalectryon

4:39 PM

94°C

Lost1

@AlexanderGruber lol hahaha. the thing is this guy is not British. He can just leave the country and no criminal record. what a shame.

Balarka Sen

@Alexander I am trying to classify all groups of order 216.

N3buchadnezzar

@BalarkaSen I try to make intellectual pop-culture references, but nobody gets them =/

Alexander Gruber

@Lost1 did he get any money out of it?

@BalarkaSen what's the factorization of that

Balarka Sen

$2^3 \cdot 3^3$

MrWho

4:40 PM

@N3buchadnezzar Show me this statement in partial fraction form :( $F'(v,x)=v'f(v,x)+f(v,x)$

N3buchadnezzar

No idea

Alexander Gruber

@BalarkaSen ok, what've you got so far?

MrWho

@N3buchadnezzar Why's that?

Balarka Sen

@AlexanderGruber i have got the normal $3$-sylow part.

it's the $4$ $3$-sylows i am having trouble with.

i am trying to count stuffs.

Alexander Gruber

@BalarkaSen you mean that there are four Sylow $3$-subgroups, or that you've narrowed it down to four options for the Sylow $3$-subgroups isomorphism type?

Balarka Sen

4:43 PM

the former.

there can be only 1 sylow 3-sbgp, in which case you'll get a bunch of groups.

@alexander you've never looked at artin, right?

Alexander Gruber

no, I used D&F at that level.

MrWho

@Hippalectryon Isn't your avatar the same as RobJohn but vice versa + being in blue instead of orange ? :O

Hippalectryon

@MrWho Who knows ;)

Alexander Gruber

@BalarkaSen do you mean the latter?

Balarka Sen

@alexander artin gives explicit presentation rather than clasifying auts and writing fancy semidirect products.

Alizter

4:45 PM

@MrWho Done? If you need anymore help with it feel free to ask.

Hippalectryon

@MrWho It proves that $\dfrac{1}{\frac{1}{@\text{robjohn}}}\neq @\text{robjohn}$

Balarka Sen

@AlexanderGruber i mean that i have classified all the groups of order 216 with only 1 normal sylow 3-sbgp.

Alexander Gruber

Ahhh okay i see

Balarka Sen

now i am trying to count the number of elts in the intersection of two sylow 3-sbgp.

Alexander Gruber

ok, so what do your $2$s look like if you have more than one $3$?

Alizter

4:46 PM

$S_4$

MrWho

@Alizter Thanks, what is the partial fraction for $f(u,v)$ answer it here!

Balarka Sen

@AlexanderGruber let me think.

Alizter

Ted Shifrin

@Alex!

Alexander Gruber

@Ted, my ex-girlfriend might be moving to your city.

Alizter

4:47 PM

@MrWho $u$ and $v$ are both functions of $x$. Right?

Balarka Sen

@AlexanderGruber the one who associates primes to fancy colors?

Ted Shifrin

Oh ... So, I guess with the ex- you win't be visiting? :)

MrWho

@Alizter What is the partial fraction in which its product would be $f(v,x)$ !

Ted Shifrin

It'll probably soon be my ex-city :)

Alexander Gruber

@BalarkaSen haha no, she's crazy.

@TedShifrin depends how the incumbent feels about that. :P

@TedShifrin are you moving?

Balarka Sen

4:49 PM

heck it, @Alex, how many girlfriends do you have.

oh, well, it's none of my business. back to thinking about groups of order 216

Alexander Gruber

@BalarkaSen One at a time, generally speaking.

Ted Shifrin

Most likely moving back to CA when I retire ... Despite my paid-for house here ...

Hippalectryon

Afk dinner, i'm nearly finished with Z :D @Alizter

Alizter

@MrWho If I take the partial derivative with respect to $x$ it doesn't work since both of the parameters of the function are in terms of x

Ted Shifrin

Bon appétit, @Hippa

Balarka Sen

4:50 PM

@AlexanderGruber wonders how he does mathematics with that

Alexander Gruber

@TedShifrin yeah it'd be a bit difficult to choose georgia over california

Alizter

@MrWho So I treat $u(x)$ as $u(y)$ then I say that the total derivative of $F$ is the sum of the partials. Now setting $y$ back to $x$ i have that product.

MrWho

@Alizter My question is $\frac{\partial }{\partial x}(what?) = f(u,v)$

Balarka Sen

Oh, @TedShifrin, i forgot to tell you. My professor says he knows about your abstract algebra book.

r9m

@MrWho How long can you hold your breath ? :D

MrWho

4:51 PM

@r9m The last record 1:43:562

Ted Shifrin

@Balarka: He probably doesn't like it. :) arguably not the best of my 4.

r9m

@MrWho XD .. I could hold it till 1:33 approx :P, can you swim ?

Alizter

@MrWho We are trying to differentiate $F(v(x),u(x))$ you with me?

MrWho

@r9m Yeah

Balarka Sen

@TedShifrin I haven't asked that to him, but he says he likes your Diff geo book.

MrWho

4:53 PM

@Alizter Yes

Alizter

@MrWho So I am saying we cannot do that unless we consider the following

r9m

@MrWho no wonder you can hold your breath that long :)

Alizter

Put $u$ in terms of $y$

Alexander Gruber

@BalarkaSen one's a good number of girlfriends to have.

Ted Shifrin

Unless you're aiming for harems @Alex :D

MrWho

4:54 PM

@Alizter My question is just $\frac{\partial }{\partial x}(what?) = f(u,v)$

Alizter

@MrWho Bear with me

Alexander Gruber

@BalarkaSen thing to think about is how the two types of subgroups interact. This is easiest when one normalizes the other, but it doesn't have to be like that.

MrWho

@Alizter What is $f(u,v)$ product of?

Alexander Gruber

@TedShifrin Oh, I'm saving that for after my PhD. :)

Ted Shifrin

:)

Alizter

4:56 PM

@MrWho Look.

I am trying to tell you that we cannot diffferentiate $F(v(x),u(x))$ exactly

MrWho

@Alizter Tell me.I'm all ears.

Balarka Sen

@AlexanderGruber I used to think all mathematicians are nerds.

Alizter

So we add the partial derivatives with respect to x of the v(x) part and the u(x) part

forget that

Balarka Sen

@AlexanderGruber I will think when I get out of these room.

Ted Shifrin

BTW, @Alex, this person might be of interest, given your woes.

Alizter

4:58 PM

$F(v(x),x)$

now if we take the derivative with respect to the first x and then add it to the derivative with respect to the second x we get the derivative with respect to x of $F$.

Alexander Gruber

@BalarkaSen we are

Ted Shifrin

I resemble that remark.

Balarka Sen

@AlexanderGruber you don't seem like one, with one weird man mustache and that many girlfriends.

MrWho

@Alizter Seriously, I'm lost, I know can get the partial derivative of any function you give me, but here $f(u,v)$ how did it even appear? I know what you mean in the last statement!

@Alizter Let me put it in another way.

Alexander Gruber

@TedShifrin She looks pretty good!

Transcript for

$Mathematics$ Mathematics