Mathematics - 2013-02-10 (page 1 of 6)

Charlie

12:00 AM

back to black

user19161

@math101 It complements your red, and also compliments your red.

Riem

you're punny

user19161

I am punny and funny, and I am also a loonie.

math101

How does it compliment my red?

user19161

It says "Red, you look lovely!"

math101

12:04 AM

hahaha

Charlie

how cute

math101

Very cute

wassup @Charlie?

Charlie

@math101 nothing up...

Riem

/logout

interestingly enough, meta.stackoverflow.com/questions/142696/… didn't work. google shall be my savior for this eternal quest to find out how to log out..

Charlie

@math101 and you?

math101

12:09 AM

Trying to deal with the aftermath of a snow storm

Charlie

@math101 Oh my how are things in there?

I'm worried

math101

It wasnt a huge storm just a foot or 2 of snow

Charlie

ow..

math101

The only issue is that I dont own a pair of waterproof boots :\

Charlie

that's bad...

@akram your name is nice

Akram Hassan

12:13 AM

@Charlie thanks

@Charlie great, what do you like in Math?

Charlie

@AkramHassan :)

@AkramHassan yes. no

Akram Hassan

@Charlie what do you do in mathematics?

Charlie

@AkramHassan I'm just an undergrad student

user19161

I only do 1+1=2 aka banana math.

Charlie

applied math

Akram Hassan

12:15 AM

@JacobBlack your life is peaceful

user19161

@AkramHassan HAHA, you mean 1+1=2? Well, that is very hard to prove...

Charlie

@JacobBlack i was reading that bananas have Tryptophan

Akram Hassan

@JacobBlack proving and banana math are two different things :)

user19161

To prove 1+1=2, one needs to study some logic and set theory first...

Charlie

@JacobBlack tryptophan has shown some promise as an antidepressant

math101

12:19 AM

@Charlie where is ur friend skullpatrol?

user19161

@math101 See that line in my profile? That is the song you sent me. I already knew about it 9000 years ago...

Charlie

@math101 I don't know :( patrolling skulls, i think

math101

lol

user19161

With mathgems and math101 I need to use more letters to avoid mispings.

Charlie

@JacobBlack tryptophan comes before serotonin, the pleasure hormone

user19161

12:21 AM

@Charlie Yeah, I read these things before.

Akram Hassan

guys do you care about the physical meaning of things or you just play with them?

Charlie

@JacobBlack you're a banana, banana has tryptophan, you give people pleausure

math101

We just play with them

user19161

@AkramHassan It is important to have intuition and motivation for topics.

user19161

For example, we think of R as a line.

Charlie

12:22 AM

5-hydroxytryptamine

user19161

R isn't really a line, but we make it so that it is like a line.

Charlie

^that makes me happy

user19161

Intuition motivates formal definitions.

user19161

After that, the definitions become logically independent of the intuition.

Charlie

@skullpatrol where are you?

user19161

12:23 AM

The definition should also agree with intuition.

user19161

In this way, what we define is what we want to define.

Akram Hassan

@JacobBlack i see

@JacobBlack having come from engineering background, i am obsessed with the physical meaning

but now i study pure math

user19161

@AkramHassan Well, physics is the largest source of math perhaps.

user19161

Much of advanced math comes from theoretical physics.

Akram Hassan

@JacobBlack what's your interest anyway?

user19161

12:26 AM

@AkramHassan Well, none. I just know simple things.

Riem

>Well, physics is the largest source of math perhaps.

could you elaborate on that?

user19161

For example, differential equations.

user19161

These arise naturally in physical phenomena.

Akram Hassan

@JacobBlack thanks

see you guys

Charlie

@AkramHassan bye!

Riem

12:27 AM

ah, so you mean math which just generally has some type of application in physics

i can partially agree to that

Charlie

Physics studies the math of nature

math101

Gotta start studying. Bye guys

Charlie

@math101 Bye!

@jacob can I call you Jake?

user19161

@Charlie You can call me anything. There is no need to use any name in chat, actually.

Charlie

you guys love to kill my fun

Peter Tamaroff

12:31 AM

@Charlie You're killing yourself.

user19161

@PeterTamaroff Has school begin for you?

Peter Tamaroff

@JacobBlack Yes. My mommy made my lunch today.

Charlie

@peter callate

user19161

@PeterTamaroff Good good.

Charlie

@PeterTamaroff launch????

Peter Tamaroff

12:33 AM

@Charlie Yes. I go to school in a rocket.

Charlie

HAHHAHAHHAHAHHAAHHAHAHAHHAHAHHAHAHAHAHHA

user19161

Mothers are very important. We must all love our mothers and cherish them.

Charlie

I love my @mom

Peter Tamaroff

@JacobBlack Unless...

user19161

@PeterTamaroff Yes, of course, not every mother is a good one.

Peter Tamaroff

12:34 AM

Now, let's not turn this into "My mother..." conversation.

Link

Hey

Charlie

hey

Link

Can someone help me integrate this? integral (cosx/(ln(x+1))dx

Peter Tamaroff

@Link You can't integrate that, mate.

$$\int \frac{\cos x}{\log(1+x)}dx$$

There. Much better.

Link

At all?

It's ln though

Peter Tamaroff

12:36 AM

@Link There ain't no partial integration, yo.

Link

Hmm

So it's impossible?

Peter Tamaroff

@Link Well, let's not get too dramatic.

You can always find comfort in power series.

Link

That's fine?

How would I go about with that.

Peter Tamaroff

@Link Well, you need some powerseries for $\frac 1 {\log (1+x)}$ around the origin.

Differentiate, differentiate, differentiate. ♪♫

3

user19161

Good night guys, I will see some of you in my dreams...

Link

12:38 AM

I honestly have no idea then.

Charlie

@JacobBlack good night

Peter Tamaroff

@Link What do you need that for?

Link

Just some random thing I came across in my textbook

amWhy

@JacobBlack g' night

Link

@JacobBlack, Nite nite

@PeterTamaroff, so how would I do this then?

Charlie

12:41 AM

@argon bunny!

Argon

@Charlie Hi Marilia!

@Charlie assets.amuniversal.com/…

Charlie

@Argon :)

@Argon people.maths.ox.ac.uk/knight/lectures/lectures.pdf

Argon

@Charlie I will look...

Peter Tamaroff

@Link I told you aldready.

My message got starred.

FUUUUUUUUU

I broke a tooth filling.

Charlie

MWAHAHAHAH

Peter Tamaroff

12:45 AM

Now I cannot enjoy my food from both sides of my tongue.

Argon

@Charlie Hmm... Axioms and theorems

@JacobBlack You are now Jacob Blue. QED.

Peter Tamaroff

It is really hard

That what she...

OH.

Argon is here.

Link

@PeterTamaroff, well played sir, well played

Riem

any geometers around here? more specifically, is an 'atlas' (on a manifold) the same name for a 'local frame', or are these two completely different terms?

just getting confused on terminology

Argon

@PeterTamaroff So sad. }:)

Charlie

12:47 AM

@Argon you are making this hard, Aary...

Link

@Argon, can you integrate this with a power series: ∫ cosx /ln(1+x)dx

Peter Tamaroff

@Riem You must be a girl, because being a man is all you're missing to kow that.

Riem+man...

Argon

@Charlie I can't get through more then a few pages!

Riem

@PeterTamaroff Ah so you're saying humanity is female by default?

Peter Tamaroff

@Riem No. I'm saying Riemann was a kickass geometer.

Charlie

12:49 AM

@Argon AAryyyyyy

Argon

@Link Can you get a series for $\frac{1}{\log (x+1)}$?

Link

No idea

Charlie

@Argon :(

Argon

@Charlie How am I supposed to wade through all this? It's like walking in deep snow

Peter Tamaroff

@Argon That's what I said!

Argon

12:50 AM

@PeterTamaroff Hmmm... I see!

Old John

Hi y'all

Argon

@OldJohn Hullo

Peter Tamaroff

12 mins ago, by Peter Tamaroff

Differentiate, differentiate, differentiate. ♪♫

@OldJohn Have you seen "This is England?"

Charlie

@Argon math.toronto.edu/weiss/set_theory.pdf

Argon

@PeterTamaroff Yes, I just read it

Old John

12:51 AM

No- what is it? film?

Charlie

@Argon Read this

Peter Tamaroff

@OldJohn Yes.

Argon

@Charlie Ok. It is all so scary!

Orange Harvester

Scary?

Peter Tamaroff

@Argon Grow a pair!

Old John

12:53 AM

@PeterTamaroff sorry - I had never heard of it :(

Charlie

@Argon Petit Lapin, please, try!

Argon

@Charlie That all makes sense. Why it is relevant, is another thing!

@PeterTamaroff bleh

I don't like self-learning set theory :(

Orange Harvester

@Argon Are you uncomfortable with set theory?

@Argon hmm

12:55 AM

@OrangeHarvester Yes, very.

Old John

@PeterTamaroff looks ..."interesting"!

Orange Harvester

@Charlie Telling how important is not going to make him more comfortable!

Charlie

shut up

Peter Tamaroff

@OldJohn It is the interesting kind.

Old John

@PeterTamaroff doesn't look like it shows England in the best possible light (if there is such a thing!)

Peter Tamaroff

12:58 AM

@OldJohn Oh, no, not at all. It is a local analysis.

Very local.

Though it involves Malvinas... =O

Not in a direct manner.

Old John

Have you watched the whole film?

@PeterTamaroff Oh - you mean the Falkland Islands :)

Peter Tamaroff

@OldJohn I was going to write Malvinas/Falkland, but I decided not to. Yes.

Old John

the youtube clip seemed to have a shot of paras yomping to Goose Green :)

I am old enough to remember the war

Peter Tamaroff

I am young enough to know very little about it.

I did see the cruiser that got sunk

Old John

@PeterTamaroff lucky - I don't think it was a very edifying episode

Peter Tamaroff

1:01 AM

Massive hole in it. Massive.

(I mean, IRC. I went to a museum.)

Jonas Teuwen

A monstrosity.

Old John

Yeah - two civilised nations squabbling over a bit of an island - not very edifying

Jonas Teuwen

Llama! I like. Like pinguin, but different.

@OldJohn I'd say: 'You're a bunch of assholes. You can have it and put it up your crack.'

Orange Harvester

@OldJohn Is there any strategic importance to the Island? Base for English to explore Antartica or something?

Old John

@JonasTeuwen Hmm - interesting political/social comment!

Jonas Teuwen

1:04 AM

But first deport all the local assholes to the island :-)).

Old John

@OrangeHarvester there seems to be a possibility of oil extraction - but I don't think that was known back when the conflict happened

Jonas Teuwen

So, a bit like Australia, really.

Peter Tamaroff

@OldJohn Yes. Apparently it is not good oil, though.

Old John

@PeterTamaroff and probably uneconomical to extract

Jonas Teuwen

Oil for assholes...

Old John

1:07 AM

did I miss some spurious flagging earlier today?

(drank too much whisky tonight, I fear)

Orange Harvester

@OldJohn yes, stuff like "I am out of this world" was flagged.

Old John

@OrangeHarvester Ah - clearly extremely offensive

Orange Harvester

1

Q: Why aren't flags in chat anonymous?

How is this user finding out information about flagging? http://chat.stackexchange.com/transcript/message/8039304#8039304 what is breaking the anonymity of the flag system?

@OldJohn And that was not all!!

Old John

you mean something even more offensive was posted?!?!

Jonas Teuwen

@OldJohn Which Scotch?

Orange Harvester

1:11 AM

@OldJohn Read the question, you might understand. Nothing "actually offensive" was posted, in case your post is not sarcastic. :P

Charlie

geez....

Old John

@JonasTeuwen no idea - I was a guest, and didn't think it polite to ask - but it tasted like a "mild" Islay

Jonas Teuwen

@OldJohn Just be like "What the shit you servin me, bro?"

Old John

@JonasTeuwen #yeah - but I didn't want to embarrass an old friend :)

Jonas Teuwen

I would see it as a compliment.

Orange Harvester

1:13 AM

I was thinking the same, I would see it as a compliment, unless it was very bad. :P

Jonas Teuwen

It is insulting if someone eats your shit and doesn't say it is shit.

So next time you get the same thing again!

Orange Harvester

And people stop drinking with you.

Jonas Teuwen

Yes.

Old John

@OrangeHarvester It wasn't a big deal - they had served up some excellent Rioja wines with a wonderful meal - any whisky was acceptable after that :)

OK - I am up to date with the flagging fiasco, I think

Peter Tamaroff

@JonasTeuwen You deserve a cookie.

Orange Harvester

1:16 AM

@OldJohn Ohh. That is quite cool.

Charlie

@OrangeHarvester " Use of blue-blocking goggles the last hours before bedtime has also been advised for people who need to adjust to an earlier bedtime, as melatonin promotes sleepiness."

Jonas Teuwen

@PeterTamaroff Crack boy. We do not have cookies here. We have biscuits. OKAY? GOT IT!? GOOD.

Peter Tamaroff

@JonasTeuwen You sick bastard.

Orange Harvester

@Charlie I have woken up right now actually. Thanks though!

Jonas Teuwen

@PeterTamaroff I want to be your dog.

Peter Tamaroff

1:17 AM

@JonasTeuwen My dog is female. Too bad for you.

Jonas Teuwen

I can be a bitch if you like me to.

4

Peter Tamaroff

You can be a hamster tough.

Orange Harvester

@JonasTeuwen You can't say that, your country made 159 billion dollars on oil dude since 1970. :P

Peter Tamaroff

@JonasTeuwen I'm cracking right now.

Charlie

@JonasTeuwen wooo

Jonas Teuwen

1:18 AM

@OrangeHarvester This countries is full of assholes.

Charlie

fetish

Jonas Teuwen

Do you have a fetish?

Peter Tamaroff

@JonasTeuwen They say hamsters can fill their mouth with a bunch of seeds and stuff.

Jonas Teuwen

I do not. Such things would not even occur to me.

Peter Tamaroff

Pouches.

Charlie

1:18 AM

no

Orange Harvester

@JonasTeuwen Good.

Jonas Teuwen

@PeterTamaroff So cute.

Peter Tamaroff

@JonasTeuwen In-deed.

Jonas Teuwen

I can feed you to my boa.

Peter Tamaroff

@JonasTeuwen Your boa would choke on my awesomeness.

Orange Harvester

1:20 AM

Boa constrict on awesomeness. They do not choke.

Jonas Teuwen

It already choked on my flat mate, but I was hoping some little furry creature would bring it back alive 8-(.

Charlie

:(

Orange Harvester

@JonasTeuwen May be choking on alligator will help?

Peter Tamaroff

@OrangeHarvester After they constrict they do.

I'd be dead. But I'd still be winnig.

Jonas Teuwen

So, what do you think about that humans are in nature able to produce the worst stench imaginable?

Peter Tamaroff

1:22 AM

@JonasTeuwen I think that is horseshit.

Jonas Teuwen

@PeterTamaroff Have you ever smelled a dead body?

Lying in the sun, in a confined room for a couple of days?

Charlie

@JonasTeuwen have you?

Peter Tamaroff

@JonasTeuwen Oh, you got me there.

Jonas Teuwen

Give it a shot.

Peter Tamaroff

I thought you meant ELABORATE.

Jonas Teuwen

1:23 AM

No pun intended.

Charlie

cadaverine and putrescine are produced by livings too

@JonasTeuwen yes

Peter Tamaroff

@JonasTeuwen Did your boa stench like shit?

Jonas Teuwen

'Dude! You stink so bad, you smell like you're already dead!'

I don't know.

Peter Tamaroff

@JonasTeuwen Well, except someone got some of that product they use in morgues.

How is it called?

Charlie

formol

?

Old John

1:26 AM

time for sleep - g'night all

Charlie

@OldJohn Good Night!

Peter Tamaroff

@Charlie Formol. Yes.

Old John

@Charlie bye for now!

Charlie

@OldJohn :D

@PeterTamaroff some women use hair products with this shit

Peter Tamaroff

@Charlie Look at that. Bitches be crazy, Charles.

Charlie

1:29 AM

hairdresser? ain't nobody got time for that

Orange Harvester

@Charlie People also use beer/light alcohol for washing their hair I hear.

Charlie

@OrangeHarvester O.o

I only wash my hair with good smell shampoo

@awllower good morning

it's great to stay up late, good morning, good morning to you

Peter Tamaroff

@Charlie Do we have a new friend now?

Charlie

@PeterTamaroff I think so

awllower

Good morning everyone.

Charlie

1:36 AM

When the band began to play
The sun was shinin' bright.

Now the milkman's on his way,
It's too late to say goodnight.

So, good mornin', good mornin'!
Sunbeams will soon smile through,
Good mornin', good mornin', to you,

Jonas Teuwen

My Dearest. I am off to bed. For I am an old man. Cheers! J.

Charlie

@JonasTeuwen Bye, Mr. Teuwen

Jonas Teuwen

Bye.

Charlie

bye bye

awllower

Wow, I see that the answer of Peter once got 111 votes!!
It is amazing!!

Orange Harvester

1:38 AM

@PeterTamaroff Really? which one? You lucky bastard. :P

awllower

111

A: Examples of apparent patterns that eventually fail

I'll hereby translate an entry in the blog Gaussianos ("Gaussians") about Polya's conjecture, titled: A BELIEF IS NOT A PROOF. We'll say a number is of even kind if in its prime factorization, an even amount of primes appear. For example $6 = 2\cdot 3$ is a number of even kind. And we'll say...

Orange Harvester

@JonasTeuwen Bye. Good night.

awllower

@JonasTeuwen Good dream then.

Charlie

@peter that are not your words? ?

Peter Tamaroff

@Charlie What do you mean?

Charlie

1:51 AM

@PeterTamaroff "I'll hereby translate an entry in the blog Gaussianos"

Peter Tamaroff

@Charlie They aren't, of course.

Charlie

did you write it?

ok

Peter Tamaroff

@Charlie gaussianos.com is a Spaniard blog.

Charlie

it's nice btw

Peter Tamaroff

@Charlie In-deed.

Orange Harvester

1:54 AM

what does gaussianos mean?

Charlie

@OrangeHarvester Gaussians

okay.

:)

:-)

(-:

1:56 AM

what doth that emoticon mean?

Peter Tamaroff

___A_____A__
____________
__O_____O__
____________
___...........____
___.____..____
___.____..____
___...........____
____________
___U___U____P

Orange Harvester

(-: means sad? I would have thought it meant a "smile back"

I smiled, she smiled back, kind of thing.

Charlie

@OrangeHarvester it's a smile anyway

Orange Harvester

@Charlie Okay.

Charlie

no worries

Orange Harvester

1:59 AM

@Charlie how was my blog design? Was it easy to read?

Charlie

@OrangeHarvester yes, yes

@OrangeHarvester what do you think if i get blonde?

:P

Orange Harvester

@Charlie It might be cool. But can you do that permanently or would you have to process your hair at regular intervals?

Charlie

@OrangeHarvester i don't think i will ever do it

Orange Harvester

@Charlie Hmm. Then why ask? :P

awllower

Thinking experiment?

Charlie

2:05 AM

@OrangeHarvester wanted to know

well, i must sleep, bye guys!

Orange Harvester

@Charlie Okay. Does not make much difference to me.

awllower

Hmm, I seem to write an answer in a comment quite oft. Per chance I shall fix this bad habbit...

Bye

Good night.

:D

:-)

2:06 AM

;)

think123

2:18 AM

good night everyone!

wow, this thing posts fast :D

Orange Harvester

2:33 AM

faster than you can think 123? :P

Eric

$\int_0^1 (e^xf(x))'\ dx = e^xf(x) \rvert_0^1$ correct?

this is fundamental theorem of calculus right?

Orange Harvester

Provided that $f'(x)$ is continuous almost everywhere on $[0,1]$.
Consider $f(x) = 0$ for $x < 1$ and $f=1$ for $x=1$ for example.

@Eric Oh, boy.

yes, it is provided

Good then.

2:44 AM

@PeterTamaroff what

Peter Tamaroff

@Eric You don't see it, do you?

Eric

See what?

Peter Tamaroff

@OrangeHarvester Why didn't you tell him?

Orange Harvester

@PeterTamaroff I was not sure if I should.

Eric

Um...

Peter Tamaroff

2:47 AM

@OrangeHarvester Oh.

@Eric Don't worry then.

Eric

....

@PeterTamaroff Ok.

Garbage Collector

3:19 AM

Happy Chinese New Year for Jasper Loy and those celebrating it!

Eric

yeazh

新年快乐! ：）

Peter Tamaroff

4:02 AM

@Eric What does it say?

@Eric Happy New Year?

Novice

4:24 AM

@Orange I've completed that course.

Orange Harvester

5:08 AM

@Novice which one?

Novice

@OrangeHarvester 6.00, but I still don't have a programmer's mind.

Orange Harvester

@Novice Okay. Then pick up some project and work on it.

For example, you can try to reimplement some mathematical functions, like high precision mathematical libraries.

Novice

@OrangeHarvester I am just a little kid.

Orange Harvester

@Novice Yeah, little kids do all the cool stuff. Its easier than you think. You may not reach the excellence of the big libraries, but what you will learn will be really cool and important. Moreover, it will give you confidence.

Novice

@OrangeHarvester What software shall I use?

Orange Harvester

5:23 AM

@Novice Try to implement in C. You have done python, so you have covered the abstract side of the programming. Now, a language like Cwill give you an insight into the implementation side. Pick up the book The C Programming Language for reference to the language. Read the first few chapters and then decide a goal like a numerical derivative calculator and try to implement it. [contd.]

You may also do your programming on C++, but currently C++ is undergoing a big change, and I am reluctant to recommend to you old books which do not completely reflect the future. There are new books but they are too expensive and I have not been able to find them otherwise. But you can use this for starters.

Actually, I take my comment back. The book I recommended seems to have a newer edition of what I have and might actually be good. I will see it and let you know. Right now, I have to go. See you later. Bye.

Novice

Bye!

Khromonkey

5:52 AM

@ethan why do you remove your stuff?

Ethan

I didn't mean to post that

Khromonkey

but you delete a lot of what you type

Transcript for

$Mathematics$ Mathematics