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user228700
2:01 PM
@heather Oh, OK...
 
@Kaumudi, how are you?
 
2:16 PM
@JohnDuffield Hi
FYI, I tried to say some nice things about you the other day, and they were deleted by the mods
We're completely banned from talking about you
 
@0celo7, hello
Wait, what...?
 
@JohnDuffield Just respond on one of my posts if you want
 
@0celo7, can't he just respond in chat? Or am I missing something here?
 
He was banned for unknown reasons.
 
Oh. @JohnDuffield, sorry about that!
Thanks for your comment on the new site meta post.
 
2:19 PM
Why did you get Nielsen-Chuang first instead of a basic QM book
like Sakurai
 
(::shrugs::) I asked for several books including a QM book, Apostol's Calculus, etc...I'm told by my grandparents that there is more coming, so who knows what that might entail.
(my grandparents live a ways away, so it seems the mail had some issues conveying the various items here)
 
I must say, getting an intro calc book and an advanced QM book at the `same' time is strange.
 
the QM book I requested was Shankar...I was told that was a good introductory book if you knew calculus, and I was also told Apostol was a good calculus book.
 
You need to know more than calculus for Shankar
And "calculus" refers to calc 3 or more
Also differential equations
 
user116211
You need Hoffman for Linear Algebra too.
 
2:22 PM
I know you need to know linear algebra, but I've already taught myself a decent portion of that.
 
You've worked through it?
Do you know what a basis is?
 
not Hoffman, another book
 
user116211
@0celo7, I took a peculiar exam today.
 
@0celo7, yes, I know what a basis is
and what eigenvalues/eigenvectors are
 
@heather Gram-Schmidt?
 
user116211
2:23 PM
Two papers.
 
@0celo7, I'd have to check my textbook again for that one, one moment
 
user116211
One on Ring Theory.
 
user116211
Other on Mechanics.
 
Why do you capitalize those words?
 
user116211
@0celo7 Why would she know that now?
 
2:23 PM
@MAFIA36790 She's smarter than us.
 
@0celo7 That is not the proper use of comments. Chat conversations in comments will be deleted.
 
@0celo7, the Gram-Schmidt Orthonormalization Process?
It's in the book I've got...I could probably figure it out.
 
user116211
Anyways, prof asked me to show Euler Lagrange Equation without using Calculus of Variations.
 
user116211
Lanczos saved me.
 
@0celo7, and in terms of calculus, I asked for Apostol I and Apostol II - is that going to be enough?
 
user116211
2:26 PM
@heather For calc III? No.
 
@ACuriousMind For fuck's sake.
 
user116211
@0celo7 SE is not forum.
 
@JohnDuffield See?
 
@MAFIA36790, how about calc II or PDEs?
 
@MAFIA36790 More like North Korea.
 
user116211
2:27 PM
JD can't talk :(
 
@MAFIA36790 huh?
 
user116211
@heather PDE? Well, a good intro, I would say.
 
user116211
@0celo7 yes.
 
what kind of first semester exam is that?
 
user116211
I don't know.
 
user228700
2:27 PM
@heather Hi :-) I'm OK, thanks! What about u? How's the self teaching going?
 
@MAFIA36790, okay. So then how much of a gap between what I need to know and Apostol I and II is there?
 
user116211
@heather Well, both the books are good for beginners; there are good exercise. Complete the two totally first. For multi-variable, you would need other books, though.
 
@Kaumudi, pretty good...my grandparents told me there's another package coming, so I get a two day birthday instead of one =P My mom was laughing so hard because I basically just asked for textbooks.
 
user116211
@0celo7 This exam was 2nd terminal; 1st sem exam is one month away.
 
user116211
Still, it was not a standard query.
 
2:29 PM
What does that even mean?
 
@MAFIA36790, darn...okay. For some reason I thought the second went into multivariable calc. Ah, well, it'll be a good start.
 
user116211
I was bit surprised.
 
How are you supposed to do that? d'Alembert principle or something?
 
user116211
@0celo7 Just like how Euler did it.
 
user228700
@heather Omg :-D Awesome! What dyour friends think about you teaching yourself all this advanced stuff?
 
2:30 PM
I don't speak German, I don't know how he did it.
 
@Kaumudi, they think I'm a nerd, obviously, which I am, but they're nerds too, so =P
 
user116211
I can give you the snapshot of Lanczos.
 
user228700
@heather :-) Well, have fun! And best of luck-I'm sure u'll need some lol :-P
 
@Kaumudi, no kidding =D How's the learning going for you?
 
user116211
@0celo7 Hey, you know German(?) .
 
2:33 PM
@MAFIA36790 Maybe...my memory is pretty bad.
 
user228700
It's going a bit slowly, tbh. Gots to pick up speed if I have any intention of completing my syllabus by December.
 
user116211
Oct 11 at 1:53, by 0celo7
I speak German fluently
 
@Kaumudi, what is in your syllabus?
 
user116211
@0celo7 Don't respond; this is not what comment is meant for. In any case, they will be deleted.
 
@MAFIA36790 It's not on comments. @ACuriousMind can search as much as he wants.
 
2:35 PM
@0celo7 Stop using the chat to try and communicate to a chat-banned user.
 
Sigh. John told me I should stop before I get into big trouble.
 
user228700
@heather Oh, I don't really know how to summarize it precisely, but I have a lot of Newtonian Mechanics, geometrical and wave optics, thermodynamics, and "modern physics" (which basically encompasses stuff like the particle nature of light, nuclear reactions and all) and that's just physics :-P
 
@Kaumudi, wow, that's awesome!!! What are you currently on?
 
@heather What I said goes for everyone.
 
wtf
 
2:37 PM
@ACuriousMind, my apologies. I'll stop.
 
@heather thanks
 
@0celo7, it's not a big deal! ACM has a point.
 
No, he doesn't.
 
Yes, he does, and so this doesn't change into some whacky argument, do you want to talk about analysis?
 
user228700
Oops, left out electrodynamics!
 
2:38 PM
@Kaumudi, can't forget the electrodynamics! =P
 
@heather no, I'm in a bad mood
 
user228700
:-P Yeah, I'm doing electrodynamics and "modern physics" now.
 
user228700
I have a lot of crap left in Chemistry and Math, sigh.
 
@0celo7, okay =)
@Kaumudi, what are you doing for math?
 
user228700
God, I hope I can stop procrastinating so much.
 
user116211
2:39 PM
@0celo7 Nazis? This is a bit extreme.
 
@Kaumudi, I procrastinate like crazy.
 
user116211
Reminds me of Wolfenstein.
 
@MAFIA36790 Definitely not.
 
user228700
@heather Oh, tell me about it >.<
 
user228700
I'm not actually that horrible :-P Some days suck, like this one. Hm, Math...
 
user116211
2:41 PM
@0celo7 Listen to some good music.
 
I'm in a bad mood because of ACM, no music can fix that.
 
@Kaumudi, I've made myself give up fiction books for the most part because they make me procrastinate
 
user116211
ACM talked just ;/
 
@0celo7, oh, come on, how about Imagine Dragons?
 
user228700
@heather Omg, NOOOO!
 
2:42 PM
@Kaumudi, what, Imagine Dragons or absence of fiction?
 
Click the arrow to see which post she's responding to.
 
user228700
@heather Absence of fiction, of course!
 
user228700
Yes, ^
 
@heather Don't like them.
 
@Kaumudi, well, I still read some, very occasionally but for the most part nonfiction is my best friend =D
 
user116211
2:43 PM
Afternoon @JohnRennie.
 
user228700
@0celo7 The Mountain Goats?
 
@0celo7, how about Young the Giant? Brad Sucks? Miike Snow?
 
What up
 
Don't know any of those people
 
@BernardMeurer, hello
 
2:44 PM
@heather Don't fickle with @0celo7 musical taste, you will only find frustration there
 
@0celo7, then you should start listening to them
 
@BernardMeurer ???
 
user228700
@heather Whatever works for u, but there is a way around procrastination :-P How does it make u procrastinate tho?
 
1 message moved to Trash
 
@BernardMeurer, speaking of frustration, could you perhaps help me a bit with Pseudocode for Turing Machines?
 
2:45 PM
@heather Sure thing :)
 
@Kaumudi, I start reading a fiction book, I get sucked in, I ignore the outside world and then I look up and it is 2 hrs later =P
 
@JohnRennie Stop deleting stuff. What the hell is wrong with you people?
 
I deleted an offensive comment
 
user228700
@0celo7 You should like, get off the internet. Till u calm down, I mean.
 
@BernardMeurer, basically, I don't understand the restrictions on pseudocode, specifically the part about recursive function calls not being allowed.
 
2:45 PM
Let me:
1. Change from my PJs
2. Get some Cheese
3. Get some ham
4. Get some beer
5. Get some water
And i'll be ready
 
@BernardMeurer, sounds good =P
 
@Kaumudi I'm perfectly calm. It's possible to be perfectly calm and in a blind rage simultaneously.
 
Perhaps I'll make myself some peanut butter oatmeal...
 
user228700
@0celo7 I highly suspect that. "Till ur blind rage subsides" then.
 
@0celo7, blind rage + internet = not good things
 
2:47 PM
@Kaumudi Consider it subsided.
I am now moderately enraged.
 
user228700
@heather U're wiser than most YouTube commenters :-P
 
user228700
@heather This was my life in middle school :-P It was a great life.
 
user228700
@heather: What kind of fiction dyou read? (Or, you used to read :-P)
 
@JohnRennie Is it bad that I've been having beer for breakfast?
 
user228700
Speaking of fiction, @MAFIA36790: Dyou read any fiction at all? I've been re-reading "The Catcher in the Rye" before bed and somehow, I feel like it's a book u might like. I don't even know u bit still :-P
 
user116211
2:51 PM
@BernardMeurer WTH ;/ why?
 
@MAFIA36790 It tastes good dawg
 
you're sick
 
user116211
@Kaumudi I read mostly non-fiction.
 
(It's also cheaper than water)
 
user116211
@BernardMeurer Coffee tastes good too.
 
user228700
2:52 PM
@MAFIA36790 Figured as much :-P
 
are all adiabatic processes involving ideal gas reversible?
 
user228700
@BernardMeurer That can't be true. Really?
 
@Kaumudi I just got up
I'm having one right now
@heather I'm ready
 
umm
it's like 2 oclock
 
@BernardMeurer, okay
 
2:53 PM
@0celo7 Yes
 
@Kaumudi, just about anything...I especially like Rick Riordan's mythology in today's world books
Just not romance or horror
 
@heather Read that one
 
@BernardMeurer, okay, putting it on my list
 
user228700
@heather Ah, OK :-) I've never had the chance to read any of his books. Anyhoo, enjoy your Math discussion! If I stick around for any longer, I'm going to kill myself :-P
 
@Kaumudi, have a good day, then, goodbye =D
 
user228700
2:56 PM
My day's almost over-it's 8:30 PM here :-P
 
good night then =)
 
user228700
You have a good day :-) Bye!
 
@BernardMeurer, okay. So my main thing with the pseudocode part is the restrictions:
1. The program has a finite, predefined number of variables.
2. Each variable can take only a finite, predefined set of possible values.
3. Recursive function calls are not allowed.
especially the third one...does that mean stuff like for and while statements are not allowed?
 
@BernardMeurer I programmed a roomba to go around a figure 8
 
@heather Did you get through the examples alright?
@0celo7 Sweet!
 
2:58 PM
@heather Iteration is not recursion (although they are often related)
 
@BernardMeurer, I think so, yeah. It made sense, so that's good.
@ACuriousMind, I probably don't understand the difference then =)
 
@heather First of all, recursion vs. iteration
While and for loops and things of the kind are iterative
We won't get deep into that now
A recursive structure is one where a function calls itself
 
oh! I didn't realize that.
 
My favorite example, the ackermann function
 
okay
how does that call itself?
 
3:01 PM
def foo(a,b):
    a = foo(b,a)
    b = foo(a,b)
    return(a,b)
 
@ACuriousMind Is the collection of all finite subsets of a countable set countable?
 
@BernardMeurer, and the Ackermann function calls itself, right.
 
@ACuriousMind Never mind (I know you're ignoring me anyway)
 
def ack2(M, N):
    if M == 0:
        return N + 1
    elif N == 0:
        return ack2(M - 1, 1)
    else:
        return ack2(M - 1, ack2(M, N - 1))
@heather Ackermann function in Python
 
@0celo7 Lookee here (The idea works for any countable set, not just $\mathbb{N}$)
 
3:06 PM
@ACuriousMind I found a proof on Proof Wiki
It's linked somewhere in the comments
 
@BernardMeurer, okay.
 
@heather Can you see why it's recursive? How it calls itself
 
@BernardMeurer, yeah, that makes sense now.
 
Generally you want to avoid recursion (hot topic, many people think differently, this is opinion)
 
So then, going back to restrictions, #1 and #2 are just saying that the number of variables has to be finite, and the number of values for those variables is finite?
 
3:11 PM
Because it's easier to screw up and generate an unbounded recursion that goes back in time and kills your grandfather so you're never born
 
lol
yes, I don't want to kill my grandfather with a recursion =D
 
@heather It's just saying the program has a finite number of variables
And that they were set beforehand
 
@BernardMeurer recursion can get inefficient because of all those function calls, and it can run out of stack space if it goes too deep. But recursion is still an exceedingly valuable technique in the right circumstances.
 
@JohnRennie That's why I said "generally"
@heather Read what John said, he's very much right
@JohnRennie I try to avoid recursion as much as I can, iteration is faster and less prone to explosions
 
Recalling your kitchen adventures, everything is prone to explosions when you're involved ;)
 
3:17 PM
@ACuriousMind Lol, you do have a point there
 
Okay, that makes sense then. Thank you! I'll keep reading and see where I get stuck next =P
 
I'm stupid
Can I just give up
 
Oh, I love 3Blue1Brown!
Their linear algebra series is excellent.
 
@BernardMeurer topology homework too hard
@ACuriousMind Imgur just emailed me about Caturday...
 
3:31 PM
I just watched all of Rick and Morty
I need a new show
 
I had a pretty good pizza last night
 
@0celo7 The slovenian made me pizza the other night
 
-1
Q: What does $w_{\tau}=-w_x$ mean?

ghosts_in_the_codeProblem and solution given at http://exir.ru/1/resh/1_106.htm A small washer put on the inclined plane, which makes an angle α with the horizon, and reported the initial velocity v 0 (Fig. 1.27). Find the dependence of the speed of the puck angle φ, if the coefficient of friction k = tg α and...

Homework-like? Revoke bounty?
 
Bacon, Ham, Spinach, Feta
 
^sounds delicious
I'm making pancakes right now =D
 
3:33 PM
@Qmechanic You know Russian?
 
user116211
@BernardMeurer The Flash.
 
@MAFIA36790 Watched it, hated it
NEXT
 
@0celo7 So? Nice of them to remind you, no? ;)
 
@0celo7 How's the dog?
 
@ACuriousMind Remind me that I haven't seen my son in 5 months?
 
3:34 PM
@0celo7 Hm? You were home not so long ago
 
Before summer
Back in May
 
@BernardMeurer Firefly.
 
@BernardMeurer Alive and well
 
@ACuriousMind Got cancelled, it will only break my heart
 
user116211
@BernardMeurer Arrow.
 
3:35 PM
He just decided to almost die for no reason, and is now back to his old self
 
@MAFIA36790 Arrow was too stupid
 
Stupid dog
 
user116211
WTH ;/
 
@BernardMeurer Still what got made were some good hours of television.
 
user116211
Legends of Tomorrow.
 
3:35 PM
@BernardMeurer since we're talking about pizza ...
 
@BernardMeurer wtf
@JohnRennie wtf
 
I've just finished this.
 
user116211
@JohnRennie ;(
 
@MAFIA36790 Will check it out
 
Brits should stick to disgusting meat dishes ;(
or Curry
 
3:36 PM
@JohnRennie That's one fine pizza right there
 
Spicy chicken, peppers, chilli, onion, everything really.
 
I gotta go to Chester
 
Actually, that's my second one. I've just eaten two of those :-)
 
So are you coming to my place for Thanksgiving?
Or are you going to Houston
 
@0celo7 Neither, no money
 
3:37 PM
man, these pancakes are looking good - they're chocolate chip, too =D
 
@JohnRennie HOW ARE YOU SKINNY
 
I'm literally going to die if I don't eat
 
plus, there's the sidebonus on munching on chocolate chips as you make them
 
now I'm hungry
 
@BernardMeurer tapeworms
2
 
3:38 PM
Fuck, I need some of those
The biology dept probably has one
 
I need some tapeworms too
 
shut up you're skinny
 
user116211
@0celo7 Why?
 
I'm 400 lbs dude
 
hmm...let's see, I'll keep a few plain for butter and syrup
 
user116211
3:39 PM
No worm talks, please.
 
@0celo7, I can't say I quite believe that, but alright
 
ask Bernardo
Wait, I forgot the conversion
It's 200
 
@heather He's a giant. Last time he hugged his sister it took us 3 weeks to find her
 
user116211
@BernardMeurer Horror!
 
now I really don't believe you =)
 
3:41 PM
I'm twice her size
 
@heather Ask Rebecca
 
That's not even a lie
 
okay, okay, nevermind
 
@0celo7 Lies
 
She's pure muscle
 
3:44 PM
She's stronger than me, definitely
@0celo7 Dude, Ron gives me shit for liking skinny girls
 
But first, we need to understand what makes a square, a square:
The inscribed square problem, also known as the square peg problem or the Toeplitz' conjecture, is an unsolved question in geometry: Does every plane simple closed curve contain all four vertices of some square? This is known to be true if the curve is convex or piecewise smooth and in other special cases. The problem was proposed by Otto Toeplitz in 1911. Some early positive results were obtained by Arnold Emch and Lev Schnirelmann. As of 2015, the general case remains open. == Problem statementEdit == Let C be a Jordan curve. A polygon P is inscribed in C if all vertices of P belong to C. The...
 
@BernardMeurer, I watched the video
it was fabulous
 
@heather It is pretty cool
 
and really interesting, too
 
@BernardMeurer I think he thought I was gay until I showed up with Rebecca
 
3:48 PM
Maths for halloween:
user image
3
 
@0celo7 He was very happy you got Reb, and kind of curious about what goes in that girl's mind
 
If the moebius strip encodes the structure of all the midpoints, that means for the square we need to induce some kind of bilinear form in order to encode the angles between the segments
 
@JohnRennie, lol
 
@BernardMeurer Hmm
 
@heather Did you do that this halloween?
 
3:50 PM
@BernardMeurer, no, but I know what I'm doing next year =P
 
@heather Lol, dress as an HP-35S if you do, it's the best calculator
 
Reminds me
@BernardMeurer bob is insane
 
The HP 35s (F2215A) is the latest in Hewlett-Packard's long line of non-graphing programmable scientific calculators. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator). == Features == The HP 35s uses either Reverse Polish Notation (RPN) or algebraic infix notation as input. Other features of the HP 35s include: Two-line alphanumeric LCD Over 800 memory registers (26 directly labelled) Scientific and statistical functions Operation in decimal...
@0celo7 Why?
 
@BernardMeurer, I'll keep that in mind...or how about the TI-89? That's the one I have; it's a pretty good calculator.
 
He didn't think one of my gfs in HS was impressive enough, so he made shit up about her when talking to his brother
 
3:52 PM
@heather TI's are good, but they all look hideous(i.e. TI 30XS). HP's aren't as good generally, but they have superb build quality and design
 
They don't look hideous!
 
Kevin hates TI
 
One sexy piece of calculator
 
The TI-89 and the TI-89 Titanium are graphing calculators developed by Texas Instruments (TI). They are differentiated from most other TI graphing calculators by their computer algebra system, which allows symbolic manipulation of algebraic expressions—equations can be solved in terms of variables, whereas the TI-83/84 series can only give a numeric result. == TI-89 == The TI-89 is a graphing calculator developed by Texas Instruments in 1998. The unit features a 160×100 pixel resolution LCD screen and a large amount of flash memory, and includes TI's Advanced Mathematics Software. The TI-89 is...
 
@0celo7 I only like the Nspire line
 
3:53 PM
That is not hideous
That is awesome
 
Bob too
Nspire CX CAS might be the greatest piece of technology on this earth
 
@heather Too many colours, it's for kids
 
Why can't my $1000 phone do a third of the stuff that thing can :(
 
LOOK AT DAT HP
@0celo7 The Nspire CX CAS runs doom on linux
enough said
 
@BernardMeurer, I am a kid! (Well, teenager but whatever) and besides colors make it styling
they give it snazzy-ness.
 
3:55 PM
My phone runs San Andreas
 
@heather Depends on how they're used, that colour palette over there, no good
@0celo7 So does any potato PC nowadays
 
gray and blue and black? That's a perfectly good color palette!
 
I just realized
I can't play GTA and use the headphones at the same time
 
@heather And yellow and purple?
Also the tones they picked are all wrong
 
@BernardMeurer, I'm going to ask my mom to get a few potatoes so I can try making a computer out of it =P
 
3:56 PM
and the materials too, the buttons should be solid plastic, not rubber
 
@BernardMeurer, hey, the yellow and purple makes it pop. And the tones aren't all wrong. Besides, my calculator can graph and yours can't =P
The buttons are plastic, not rubber.
 
@heather This reminds me, did you get an RPi?
@heather Well, they look rubbery
 
@BernardMeurer does your CX get scratched really easily?
The screen I mean
 
@BernardMeurer, raspberry pi...I still need to ask my dad. I'm waiting for when he's a. not busy b. in a really good mood
 
Mines got a good gouge
 
3:57 PM
@0celo7 No scratches on mine I think, let me check
 
What's bad about rubbery buttons?
 
But anyway, I'll ask him soon.
@ACuriousMind, rubbery buttons feel weird.
 
@ACuriousMind Not enough plastic
 
@0celo7 Nope, no scratches
 
@KyleKanos prove you are who you say you are
 
3:58 PM
@ACuriousMind less tactile feedback, so iyou make more mistakes
 
I think I'm dreaming, for a minute I imagined @KyleKanos came in
 
@0celo7 Shut up ryan
 
@KyleKanos Kyle!
 
Hi all
 
@0celo7 Lol, you got wasted Ryan
 
3:59 PM
@KyleKanos Hey, how are you?
 
@ACuriousMind This happens like...monthly. Maybe?
 
@KyleKanos, hello (::awestruck::) I've never seen you around.
 
@ACuriousMind Doing well. Just cooking lunch for the kids. Yourself
 
@KyleKanos I made a good joke about OpenMP the other day, no one got it :(
@KyleKanos Can I be your kid real quick? I'm hungry
 
@heather Because I kinda quit the site b/c I don't have time between the job, kids &, most importantly, the wife
 
3:59 PM
I swear I won't ask for college tuition
 
@BernardMeurer Link? I can laugh at it for you
 

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