The h Bar

DanielSank

12:28 AM

@Mithrandir24601 So, what do I type into cmd?

Mithrandir24601

@DanielSank If you're happy and you know it

DanielSank

I don't get it.

happy was unexpected at this time

Also:

1

Q: Prove linear relation between random variables based on correlation

$\renewcommand{\avg}[1]{\left \langle #1 \right \rangle}$ Suppose we have a probability distribution in two variables $$P_{XY}(x,y) \, .$$ Define the correlation as $$\rho \equiv \frac{\langle \langle X Y \rangle \rangle}{\sqrt{\langle \langle X^2 \rangle \rangle \langle \langle Y^2 \rangle \rang...

Mithrandir24601

@DanielSank I found it about an hour ago from this answer:

780

A: What is your best programmer joke?

If you're happy and you know it, syntax error!

DanielSank

ah now I get it

@Mithrandir24601 Doesn't work on my system.

Mithrandir24601

@DanielSank According to one of the comments, they got rid of the 'syntax error' output in modern versions of Windows :/ It seems to give "[x] was unexpected at this time" for any input of the form "If [any single word] [x]"

Sir Cumference

12:43 AM

598

A: What is your best programmer joke?

["hip","hip"] (hip hip array!)

Mithrandir24601

"To understand what recursion is, you must first understand recursion."

Cows

1:13 AM

@SirCumference well yes I sure am lol

Secret

4:44 AM

UoM Chemistry 19 Uranium: A Cure For Cancer?

►

user228700

4:58 AM

Crap, where's @Balarka?! :'-o

Anonymous

@Kaumudi.H What happened?

Anonymous

If it's vector calculus I might be able to help a bit...

Secret

5:16 AM

Mercury vortex in a magnetic field

►

simple principles of induction produce spatacular results

user228700

@Blue Yep, yep, I continue to struggle! I have two more chapters to finish before I leave this evening!

Anonymous

@Kaumudi.H I see. Go ahead and ask :)

user228700

Thanks :-) I'll ping ya when I encounter something particularly nasty and problematic...

John Rennie

@Blue morning. How's the laptop? :-)

Anonymous

@JohnRennie AWESOME! Gedit was installed and the text editor was showing

John Rennie

5:26 AM

So it is basically all working then?

Anonymous

Yes :)

Anonymous

I found a manual to run C programs from the Ubuntu terminal

Anonymous

I'll try it out sometime

John Rennie

Running Linux GUI apps is a bit of a pain because you need to:
1) run Xming from the start menu
2) use the export DISPLAY=:0 command

But at least you only need do this once each session i.e. if the laptop has been shut down/restarted

Anonymous

@JohnRennie I see. Yeah, I didn't try the GUI apps yet. I'll try later. Will ask you if I get stuck. :)

Anonymous

5:30 AM

Anyhow, I'm enjoying this super-fast laptop now

John Rennie

But I'd guess the laptop will mostly be used for the usual Windows stuff anyway, with Ubuntu being used only when necessary.

And as you've found, for Windows the SSD makes things dramaticaly faster.

Anonymous

I might use Ubuntu to run C and Python codes just to get some practice with using the OS!

Anonymous

I don't even use Windows much tbh. Just Chrome

Anonymous

At the moment I'm prepping for this electronics test on Tuesday with a gigantic syllabus. A 100 types of doping! God save me... :P

John Rennie

5:45 AM

Good luck! :-)

Anonymous

Thanks XD

user228700

6:03 AM

Ah, if only one of you could take the exam in my place! ;_;

Anonymous

@Kaumudi.H You know @0celo7 was right. Tests should be banned. :P

user228700

Absolutely!

user228700

It has just occurred to me that we will all struggle to explain our obsession with memes to future generations. How can it be put to words, this mania?

user228700

I should probably get back to Green's Theorem, dang it.

Anonymous

@Kaumudi.H We wouldn't even have to explain it. They would be born knowing it.

Anonymous

6:10 AM

@Kaumudi.H Right

0celo7

As you grow older you will realize that in all of my insane ramblings there is a kernel of truth/wisdom

John Rennie

@Blue if all you do on Windows is run Chrome then have you considered just installing Linux?

Anonymous

Don't get distracted...lol

user228700

@Blue :-P Yess.

John Rennie

That would make Bernardo happy :-)

user228700

6:11 AM

@0celo7 x'D We'll let you know if such a realization occurs.

Anonymous

@JohnRennie I have, indeed. I like the Windows GUI however

0celo7

Blue just had his

Anonymous

@JohnRennie hahaha

0celo7

You will too one day

Anonymous

@JohnRennie Is it possible to use both the OS's and shift between them as necessary?

Anonymous

6:13 AM

(I mean without using the Ubuntu app)

Anonymous

While starting they should give an option as to which OS I want to use

John Rennie

Yes, you can set up a laptop so it dual boots i.e. when you start it you choose whether to boot Windows or Linux

Anonymous

@JohnRennie Exactly. I want that one. Let's meet on 14th to do that!

John Rennie

14th? Is that when the exams end?

Anonymous

@JohnRennie Yes :P

John Rennie

6:14 AM

OK :-)

Anonymous

Then I have around 15 days of free time when I intend to learn Python seriously. (And practice C)

Anonymous

Okaies :)

John Rennie

Keep the Windows install USB safe because we'll need to repartition the disk and reinstall Windows, which is less scary than it sounds.

Anonymous

Sure. I'm keeping them locked in my own drawer this time. (Not papa's..hehe)

enumaris

hmm

user228700

6:24 AM

@Blue 15! :-o You're lucky!

Anonymous

@Kaumudi.H Officially only 3-4 days. But most people will be going to visit their hometowns after the exams. So unofficially a few weeks of holidays

Anonymous

And then you know Christmas and New Year

Anonymous

So a few more for those

user228700

Huh? Unofficial holidays? Do you mean that most students will do a mass bunk?

user228700

I've got about 10 days, I think.

Anonymous

6:29 AM

@Kaumudi.H Right...hehe

user228700

Oh, my! :-o Wow.

Anonymous

Here students are allowed to decide class timings...soo

Anonymous

It's quite flexible

user228700

Damn.

enumaris

welp, built a rnn in tensorflow...unfortunately it's not working lol...

Balarka Sen

6:31 AM

what's cooking

user228700

@BalarkaSen Eyy, ze God's back!

user228700

Say, @Blue: What was the name of our fellow JEE aspirant friend? The one with many cats, a pink avatar...

Anonymous

Yashas

user228700

Ah! He's studying in IIITH, no?

Anonymous

Yes, he was around a couple of days back

user228700

6:34 AM

He was? Cool :-)

user228700

@Blue That would mean that his rank was below 1000, no?

Anonymous

@Kaumudi.H No. He got in through the KVPY channel

user228700

Ah, nice! :-)

Balarka Sen

what kind of God? I certainly don't want to be a Christian/Hindu God

the Norse guys are where the fun is at

user228700

@BalarkaSen The Math God, to be clear! :-)

Balarka Sen

6:36 AM

i.e. a useless one

Anonymous

lol

Balarka Sen

who caaaaares

user228700

@BalarkaSen :-/

Balarka Sen

even the rap god would be something ;)

Anonymous

He's just a 60's Soviet mathematician who's fooling us by pretending to be a kid

Anonymous

6:37 AM

So I don't care :P

Balarka Sen

I would be Slim Shady anyday

user228700

@Blue I too strongly suspect this :-P

user228700

There is no evidence to the contrary :-P None at all!

user228700

@Balarka: I will pay you to fly to Kochi to take my exam for me ;_;

Balarka Sen

well its your exam

user228700

6:43 AM

Doing surface integrals now...

Balarka Sen

Cool

user228700

Got through Greens' Theorem, BTW.

Anonymous

Vector calculus is actually easy though once you get hold of the intuition. I don't know why you're getting worked up.

Anonymous

Go slow and try to understand the things bit by bit :)

Anonymous

Ask here if you're stuck

user228700

6:46 AM

Oh, I don't have enough time to go slow :-/

Balarka Sen

@Kaumudi.H Very nice. Green's theorem is quite beautiful.

Have you noticed that what it means is $\displaystyle \int_C \mathbf{F} \cdot \mathbf{ds} = \int_A \text{curl} \mathbf{F}\, dA$?

user228700

Nope!

Balarka Sen

What is it in your formulation?

user228700

Hang on, I'm in the middle of attempting to understand another theorem, of sorts...

user228700

Give me a few minutes, please!

Balarka Sen

6:49 AM

Sure

DanielSank

I have reason to believe that the following integral will help me understand Poisson distributions:

$$\int_0^T dt_1 \int_{t_1}^T dt_2 \int_{t_2}^T dt_3 \cdots \int_{t_{n-1}}^T dt_n$$

user228700

@BalarkaSen Surfaces are graphed using two parameters? OK, that should make sense.

DanielSank

Anyone know how to evaluate it?

Balarka Sen

@Kaumudi.H Right.

user228700

Hang on, surfaces are...2 dimensional, no?

Balarka Sen

6:51 AM

Indeed

user228700

Why would we need two parameters, then? One should do, no?

Balarka Sen

One parameter would give.... a 1-dimensional thing

enumaris

I like the notation $\int_\Omega (\vec{\nabla}\times\vec{F})\cdot d\vec{S}$

user228700

No, no, I mean the same way in which a function $f(x)$, depending on an independent parameter $x$, sketches a...a curve. Huh. OK, that makes sense.

user228700

That question didn't make sense.

user228700

6:54 AM

OK, never mind!

user228700

(FYI, this is what I am attempting to digest:)

user228700

Balarka Sen

Right, that's change of variables again

It's the same thing as pulling back a line integral to a Riemann integral on an interval

user228700

I...see, OK.

Balarka Sen

But in this case you're pulling back a surface integral to a Riemann integral on a planar domain

Paths are parameterized over intervals, surfaces are parameterized over planar domains

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