Mathematics - 2013-03-25 (page 1 of 3)

$$\begin{array}{c|c|c|c|c|c|}
0.4705882353 \\
4.235294118 & 5.490196078 \\
2.917647059 & 2.478431373 & 2.277647059 \\
2.658823529 & 2.572549020 & 2.57882353 & 2.583604109 \\
2.650506805 & 2.647734564 & 2.652746933 & 2.653920321 & 2.654196071 \\
2.651347164 & 2.651627283 & 2.651886798 & 2.651873144 & 2.651865116 & 2.651862838 \\
2.651563252 & 2.651635281 & 2.651635815 & 2.651631831 & 2.651630884 & 2.651630655 & 2.651630599 \\
2.651617306 & 2.651635325 & 2.651635328 & 2.65163532 & 2.651635333 & 2.651635338 & 2.651635339 & 2.651635339 \\

caveman

@Amzoti, I recommend data like this be displayed in raw text

like this

fixed width text

Amzoti

12:50 AM

@caveman: it is currently a fixed width - i think - are you saying to truncate more?

caveman

no

Amzoti

1:02 AM

@caveman: got what you mean - sorry was tired from writing long answer! Changed display to raw text!

caveman

good

caveman

1:26 AM

@anon, do you work very hard on math

@AlanH, cool question about the digit sequences

AlanH

?

caveman

heh no one can solvemy question

anon

1:49 AM

@caveman not as hard as I should why?

caveman

just wondering

I think I need to work harder

myusuf3

2:11 AM

hey

i was wondering

how I can go about normalizing a group of numbers between 1-7

7 being max

1 being smallest

or rather

1 being 1

7 being max

caveman

normalizing??

myusuf3

0 being 0

so lets say I have

15 6 79 100 150

I want this numbers to be normalized to be between 1 - 7

@caveman ^

caveman

whatdoes thatmean?

myusuf3

I have 7 things I can use to represent

all the numbers in a set

7 being the highest

1 being 1

so if I want to be able to represent these given numbers with their relative equalivant in 1-7

how would I got about calculating this

caveman

(x-6)*(7-1)/(150-6)+1

myusuf3

2:18 AM

???

basically want to break up the group of numbers into 78 brackets

7*

what

What are you asking?

nvm

i want to help

2:35 AM

hi Ethan

Ethan

hi

@caveman can you help me out

caveman

ill try

Ethan

@caveman I am trying to find this article online, onlinelibrary.wiley.com/doi/10.1002/cpa.3160020208/abstract, but I don't have any registered accounts or what not

caveman

you could try the "get PDF" link from the university library

Ethan

It says I need an account to get it

myusuf3

2:41 AM

i figured it out

caveman

but when you click that in a university network it might give you the pdf right away, they often have this set up

myusuf3

i first need to get a range

once I have the range

i want to divide that by number of steps

Ethan

@caveman lol I go to high school

caveman

you need to go to a university

Ethan

I am 17

κρανίοπεριπολία

2:54 AM

(removed)

Ethan

3:15 AM

how do I denote absolute value in latex

Faust7

i just use the |x| on the keyboard lol

Ethan

I dont have those key

|

nvm I do !

Faust7

lol

Gustavo Bandeira

3:39 AM

@Ethan Hello!

Ethan

hey

Karl's students

4:09 AM

The last message was posted 3 centuries ago.

Karl's students

4:24 AM

3 months later...

Ethan

whats a "karl's student", who is karl?, and why are you his student?

Karl's students

@Ethan Wait

5

A: What are the advantages of TikZ/PGF over PSTricks?

One good feature of TikZ is that the canvas size is automatically provided. But it is visually not as smart as I think (see question Bounding box is larger than expected when drawing a curved path). In PSTricks, the canvas must be calculated manually to let TeX provide the required space (becaus...

Ethan

????

Karl's students

@Ethan You need to read to know who Karl's students are.

Ethan

karl is a math and chemistry high school teacher

Karl's students

4:31 AM

(removed)

Ethan

@Karl'sstudents why don't you change your user profile name, to your actual name

Also those students are kind of creepy looking

Karl's students

@Ethan No. It is a difficult option in my life.

Ethan

and the vote sign is annoying

on your page

lol

Karl's students

@Ethan :-)

Ethan

Karl, are you really 14

Karl's students

4:35 AM

@Ethan Oh my ghost! :-)

I am Jasper Loy's class mate.

Ethan

Jasperloy isn't a teenager, so I take it your over 14

Karl's students

@Ethan :-)

Ethan

Why don't you talk to me, why are you in this chat?

Karl's students

@Ethan Just for monitoring Jasper Loy :D

Ethan

Why are you making smiley faces, are you happy?

Karl's students

4:38 AM

2 years later...

@Ethan while(true){console.writeline("I am always happy!");}

Ethan

If thats a joke, I don't understand it, if its not, why are you always happy

Karl's students

@Ethan Because everyday is my holiday.

Ethan

@Karl'sstudents Do you enjoy your life

Karl's students

No job everyday, just eating, sleeping and drawing diagrams with PSTricks.

@Ethan Yes.

Ethan

I guess we havn't really defined enjoy, yet, just compare it to past experiences

Karl's students

4:42 AM

@Ethan Do you have TeX.SX account?

Ethan

No

What do you do for a living?

Karl's students

@Ethan Are you an English native speaker?

Ethan

yes

Karl's students

@Ethan I am getting some money from my parents. :D

Not much!

Not enough!

@Ethan Why do you stay in this chat room everyday?

Ethan

I don't know

Karl's students

4:44 AM

:8667800 So you are jobless?

Ethan

I am 17 years old, I live with my mom and grandmother

Karl's students

@Ethan Where is your father?

Ethan

@Karl'sstudents I don't live with him

Karl's students

@Ethan Why?

Ethan

I left

Karl's students

4:46 AM

@Ethan Why did you leave your father?

Ethan

Rather not talk about it, I don't even know your name

Or how old you are

Karl's students

@Ethan Between 13 and 50. :D

Ethan

Thats not very helpful

Your not religious are you

Karl's students

@Ethan I am skeptic.

Ethan

lol

I don't think of such things

Karl's students

4:48 AM

@Ethan Are you a religious boy?

Ethan

No

@Karl'sstudents did you have many freinds in your elementary school years?

Karl's students

@Ethan Yes. Too many and I left some of them. :D

Ethan

@Karl'sstudents are you heterosexual

Karl's students

@Ethan no. I am hermaphrodite. :-)

Ethan

Is that a joke?

Karl's students

4:50 AM

@Ethan :-)

Ethan

Have you ever been in any significant relationships?

Karl's students

@Ethan Oh my ghost. You investigate me in the public area. :D

2

Ethan

I don't understand your response

Karl's students

@Ethan I have made a new answer:

0

A: Color the faces of a graph

Just for fun with PSTricks. \documentclass[pstricks,border=12pt]{standalone} \usepackage{pst-eucl} \usepackage{multido} \psset { PointName=none, PointSymbol=none, } \def\Atom{% \pstGeonode{L}(1;45){T}(!2 sqrt 0){R} \pnode[-0.5,0.75](T){CL} \pnode[0.5,0.75](T){CR} \...

Ethan

Why do you do this?

Karl's students

4:53 AM

It needs some up votes.

Ethan

Why do you want upvotes?

Karl's students

@Ethan Because I like technical drawing.

@Ethan Yes.

I am really hungry. My rice is ready. So it is time to eat. :-)

Hi folks, I have to eat, sayounara!

Ethan

Its only me

Dominic Michaelis

5:49 AM

I don't unterstand why nobody likes my answer here

@Karl'sstudents why is $\LaTeX$ so damn sexy ? :D

Karl's students

@DominicMichaelis I am sorry. I am eating now... :D LaTeX and PSTricks are very exciting!

κρανίοπεριπολία

7:08 AM

0.999... hours later…

$0^{-1} hours later$

Faust7

8:22 AM

i find it extremely amusing that the chat activity spikes at 2:30 am till about 7am server time... why is there such a strong correlation to enjoying math and not sleeping?

κρανίοπεριπολία

math $\neq$ sleep

user19161

9:17 AM

@Faust7 Also remember that there are people from all time zones.

user19161

@Karl'sstudents Oh my ghost!

Leong Lyn

9:36 AM

hello, anyone knows how to compute coeff of spline interpolant using matlab?

Gustavo Bandeira

10:40 AM

@Ethan Sorry for not talking more. I talekd to you and then I went to an endless piano studying.

κρανίοπεριπολία

11:42 AM

yo @JayeshBadwaik wazzup?

Jayesh Badwaik

@κρανίοπεριπολία Hi,nothing, just lazing around a little bit right now.

CBenni

meh. Someone is downvoting a question of me every day since 1 week. Kinda annoying, as my rep has sunken a lot by that. people are idiots.

κρανίοπεριπολία

11:58 AM

Have you asked a moderator to try and track this person?

CBenni

no

@κρανίοπεριπολία: where would I do that

κρανίοπεριπολία

Just "ping" one here.

CBenni

@κρανίοπεριπολία: mmh, and how do I find out who is mod?

Michael Corleone

hint: look for a mean square

CBenni

robjohn is mod?

I thought he was just awesome ^.^

@robjohn may I have a quick word?

Michael Corleone

12:05 PM

yes as far as i know anyway

κρανίοπεριπολία

Their usernames are blue and they have a blue diamond next to it.

CBenni

I think the ♦ symbol meant that

yeah

anon

I don't think much can be done above downvoter abuse

CBenni

mmh

then I have to post more awesome questions :D

funnyly, most of my high-effort questions have received more down- than upvotes

or they were CWed

κρανίοπεριπολία

Don't try so hard :D

CBenni

12:11 PM

:D

well I just want to be established

after that, I dont really care

reviewing and editing isnt too important (I can suggest edits anyways)

κρανίοπεριπολία

math requires just the right amount of effort in the right direction...

CBenni

howd'you mean?

κρανίοπεριπολία

well, i equate math with learning...so you can't force yourself too much IMO

user19161

12:49 PM

@CBenni Did you make any enemies recently?

Karl's students

1:12 PM

This comment was removed because it violated our terms of service.

Charlie

@κρανίοπεριπολία Hi Skull!

@Karl'sstudents Hi Karly!

Karl's students

@Charlie HI charlie!

Charlie

@Karl'sstudents I'm fine,.are you fine?

Karl's students

Can $e^{ix}=\sin x + i \cos x$ be used with $x$ in degree?

@Charlie for(;;){Console.WriteLine("I am always fine.");}

Charlie

@Karl'sstudents good :)

Karl's students

1:24 PM

1 min ago, by Karl's students

Can $e^{ix}=\sin x + i \cos x$ be used with $x$ in degree?

Charlie

@Karl'sstudents I don't know :(

Karl's students

I would also like to add that learning how to write computer programs provides one with another way of thinking about the world, which is different from mathematics.

Karl's students

1:54 PM

@κρανίοπεριπολία hi,

Charlie

2:14 PM

@Karl'sstudents :D

Karl's students

@Charlie :-)

Charlie

@Karl'sstudents have you been doing anything funny lately?

Karl's students

@TysonWilliams: Even though your question does not conform to my answer, I didn't downvote yours. :-) — Karl's students 23 mins ago

@Charlie I hope you will always ask me : "What did you do with PSTricks lately?"

Charlie

@Karl'sstudents that's what I meant

Karl's students

@Charlie Updating my answer: tex.stackexchange.com/a/103890/19356

Jasper Loy no sukina ongaku ha youtube.com/watch?v=edXwUJOGF8M desu.

@Charlie Charly!

Charlie

2:34 PM

@Karl'sstudents yes!

:D

@Karl'sstudents what is it?

Karl's students

@Charlie Jasper Loy's favorite song.

Charlie

@Karl'sstudents really? Are you sure?

Karl's students

@Charlie Very sure!

Charlie

@Karl'sstudents oh! How do you it?

Karl's students

@Charlie I cannot parse your sentence and it is not understandable. :D

Tobias Kildetoft

2:44 PM

quick check: Is any direct summand of an injective module itself injective?

Charlie

@Karl'sstudents I forgot to type "know", sorry :P

Karl's students

@Charlie OK. Because Jasper Loy is my class mate.

Charlie

@Karl'sstudents this story is getting very weird...

Karl's students

@Charlie :-)

Charlie

:P

As my friend @κρανίοπεριπολία says, I'll save my energy for what really matters :)

@arkamis hi Ed.

Arkamis

2:55 PM

@Charlie Good morning!

Charlie

@Arkamis good morning! How are you?

Arkamis

tired >.<

Charlie

@Arkamis ow...

Arkamis

I slept poorly last night

The cats didn't help

Charlie

Your cats annoyed you??

Arkamis

2:58 PM

yeah

Kept getting all up in my face while I was trying to sleep

Every time I tried throwing them out of the room, they ran under the bed

Charlie

@Arkamis ooow :P

Arkamis

Also, it's snowing again

So much snow

This year has been crazy

Jayesh Badwaik

@Karl'sstudents lambda calculus, cough cough..

@Karl'sstudents no.

@Charlie ......

Arkamis

3:15 PM

Alright, I have a question that should be easy, but is annoying the crap out of me

I have two points, and I want to determine if their relative angle is small

wait

nevermind.

nevermind, I'm an idiot.

Karl's students

@JayeshBadwaik: Thanks for responding.

Charlie

3:36 PM

@JayeshBadwaik you take so long,.Jayesh, you take so long....

Hi @dominic

I won't ping @michael because he will take a life to answer ;)

CBenni

3:54 PM

@JasperLoy yes

Charlie

Did anyone see?

@Karl'sstudents have you seen Jasper?

anorton

4:10 PM

@Charlie did anyone see what?

Charlie

@anorton my patience... I lost it....

anorton

heh... :)

Charlie

4:25 PM

Haha I'm detestable

Jayesh Badwaik

@Charlie I really don't think so.

Charlie

Nah, I am

Jayesh Badwaik

I have your patience by the way.

:-)

Charlie

@JayeshBadwaik I knew it!

I'm having a bad bad day, if you take it personal that's ok, watch this is so fun to see, despicable me

CBenni

someone good at combinatorics here?

Tobias Kildetoft

4:40 PM

@CBenni depends on how advanced combinatorics

CBenni

what is the number of nonnegative integer solutions to $\sum_{i=1}^n a_i=x$

in dependency of n,x

cant figure it out, I bet there is a simple solution to it

basically, it should be the number of ways to distribute x balls into n jars

Tobias Kildetoft

it is $\binom{n+x - 1}{n-1}$

CBenni

order is of importance

thank you ;)

I am horrible at combinatorics, I just cant get my head around to it

I havent had to learn it yet, all I know is from what I have read on my own and explained to other people

Michael Corleone

@Charlie Haha you were right, very busy week. Hope you are alright. Not sure I have the time to talk really

CBenni

@TobiasKildetoft why n-1? Shouldnt it be ${n+x-1}\choose{x}$? (I took that from wikipedia)

Tobias Kildetoft

4:53 PM

@CBenni same thing

CBenni

oh really

damn

binomial factors kill me :D

Tobias Kildetoft

by the usual properties of binomial coefficients

$\binom{n}{m} = \binom{n}{n-m}$

CBenni

yeah, you are correct. Thanks

Transcript for

$Mathematics$ Mathematics