The Nineteenth Byte

quartata

3:01 AM

...no takers?

Anonymous

@TanMath Or maybe I went to do other things, like eat dinner and take care of house chores

Anonymous

Why the hell did I come back to 10 pings

quartata

If it doesn't get cracked in an hour I'll reveal it.

Alex A.

@Eridan See help center ¯\_(ツ)_/¯

Anonymous

@Eridan Only the good ones

Eridan

3:05 AM

@Mego a_a

@AlexA. Which part? It's rather large.

quartata

9 mins ago, by quartata

(utt.synth (Utterance Text ""))
(format t "Hello, World!")

No one?

Remember, no STDERR output. It must output "Hello, World!" to STDOUT and nothing else.

Alex A.

> Do not use signature, taglines, or greetings.

Eridan

Got it

Alex A.

;)

Eridan

Disappointed but understanding

Maltysen

3:07 AM

hey @AlexA. you're a math major and stuff right?

I have a math question

Alex A.

BSc in math

I have a math answer

Maltysen

My textbook defines the limit of vectors as the limit as the distance between the two vectors goes to 0

Alex A.

But note that alex-is-wrong so request help at your own peril :P

10

Maltysen

This seemed cool until I realized that it was was a limit of a dependent quantity

how does this work?

can you do that?

Zgarb

@Maltysen What do you mean by a "dependent quantity"?

Alex A.

3:12 AM

What do you mean by "the limit of vectors"?

GamrCorps

@Maltysen Does this help: tutorial.math.lamar.edu/Classes/CalcIII/VectorFcnsCalculus.aspx

Anonymous

@AlexA. What do you need broski?

Anonymous

@Maltysen What do you mean by "math"?

Alex A.

@Mego I need your lovin

quartata

@Maltysen You're asking Alex for help with something? What has the world come to.

Maltysen

3:13 AM

@AlexA. the lim as x-> <1,2,3>

Doorknob

Hey people you should join dystroy.org/miaou/1216?PPCG :P

quartata

alex-is-wrong people

El'endia Starman

@quartata Uhhhhh....LISP variant?

Maltysen

@GamrCorps not really. I understand that, but wanted to understand why the alternate definition works

quartata

@El'endiaStarman Yes.

Eridan

3:14 AM

@Maltysen Are you asking about something like the limit as x->0, y->0, z->0 of f(x,y,z)?

GamrCorps

@Maltysen Oh I see, I have no clue what that means but you have my support.

Anonymous

@AlexA. All my hugs and kisses too?

Maltysen

@Eridan yep

TanMath

@Mego your. Challenge is too hard!

I give up

El'endia Starman

@quartata Clojure, maybe?

quartata

3:15 AM

@El'endiaStarman Nope.

It's a variant of Scheme.

El'endia Starman

@TanMath The Bernoulli one? I actually solved it with fractions in Minkolang.

quartata

But it doesn't work in any of the standard Lisp stuff because the first line throws an error.

Mwahahahahaha

El'endia Starman

Only problem is, go much higher than like n=15 (n=60 suffices) and you can lock up Apache on the server (or at least slow it down to unusability).

TanMath

@El'endiaStarman why doesn't if work but?

Zgarb

@Maltysen So if I understand correctly, you have the definition that lim (a, b, c) = (x, y, z) if lim a = x, lim b = y and lim c = z. Then you have an alternate definition that lim (a, b, c) = (x, y, z) if lim dist[(a, b, c), (x, y, z)] = 0. You want to see why these are equivalent. Right?

Eridan

3:17 AM

We did this in my Multivariable Calc class today. You set two of the variables equal to what the limit is taking, then evaluate the limit at the third variable. Repeat this for all three variables, then test along selected lines/curves that work out nicely; x=ay=bz works, but usually x=y=z is easiest

quartata

@El'endiaStarman Yipes

Calvin's Hobbies

PPCG Quiz

Doorknob

Mini-challenge: turn [tag:these] [tag:are] some words into these are [tag:some] [tag:words]. That is, "invert" the tagginess of the input words.

Anonymous

@El'endiaStarman Except for the inaccuracies above 33 :P

Maltysen

@Zgarb yeah

but more like why can you take the limit of dist[(a, b, c), (x, y, z)]

El'endia Starman

3:19 AM

@Mego That wasn't with fractions.

Doorknob

@Calvin'sHobbies huh... I'll have to go with Peter for #2, though I'm not sure

1 and 3 are easy...

Hmm, 4 is a challenge

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Calvin'sHobbies 4/7

Alex A.

@Calvin'sHobbies 100%!!!!

El'endia Starman

3/7 :'(

Alex A.

7/7 ftw

Eridan

3:20 AM

6/7

I was on there :D

@AlexA. Very good!

5/7

CJam == Cherry Jam!?

Anyway, for n=15, my code has this fraction:

2966157772582254953931139563933193239063244903345451937289905861760744364264732‌526683159927250549426880695487003927722403930570752000000000000000000000000000000‌0000000/2542420947927647103369548197657022776339924202867530231962776452937780883‌655485022871279937643328080183453274574795190631940489216000000000000000000000000‌0000000000000

Zgarb

3:20 AM

@Maltysen Well, you can define a function f(a, b, c) = dist[(a, b, c), (x, y, z)].

Cᴏɴᴏʀ O'Bʀɪᴇɴ

good night y'alls

quartata

Dear god I got 7/7 on it

El'endia Starman

@CᴏɴᴏʀO'Bʀɪᴇɴ I got that one wrong too! I always thought it was a joke...

quartata

What is wrong with me.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman Yah

Eridan

3:21 AM

Although in reality, CJam is just nonsense

Doorknob

You people actually got the Sp one? O_o

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@quartata You're an idiot?

Anonymous

Anonymous

Turns out that paying attention in chat makes you learn stuff

Anonymous

Who knew

Alex A.

3:21 AM

@Doorknob I've asked him before. :P

quartata

I did guess on the StackEgg one.

Calvin's Hobbies

@Doorknob I only know because I explicitly asked Sp once :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

because IEEE

Doorknob

I got the animal one wrong and the Sp one wrong.

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ You edited that lmao

Alex A.

3:22 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ Good night!

quartata

@Doorknob How could you get the animal one wrong?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@AlexA. Oh yeah

Doorknob

@quartata I guessed flawr :P

quartata

I mean, VTC is in chat a lot.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Good night ^_^

Alex A.

3:22 AM

@Doorknob He has that weird snake thing

Anonymous

I almost clicked Elendia, but then I remembered he has sanic

Cᴏɴᴏʀ O'Bʀɪᴇɴ

abandon all sleep, ye who enter here —me

quartata

The animal one was actually the easiest for me.

Doorknob

@AlexA. oh yeah

quartata

I more or less have everyone's avatars memorized

Calvin's Hobbies

3:23 AM

> sanic

quartata

That ID one was hard as shit though

Anonymous

@Calvin'sHobbies sanicball gotta go fast

Alex A.

quartata

I got lucky on that, I'll admit.

Doorknob

When you think about it, it's obvious. Peter was here from... almost the very start

quartata

3:23 AM

@Doorknob Not exactly

Doorknob

and I remember him being like #1-2 in rep when I joined

Alex A.

Yeah, his user ID is three digits IIRC

quartata

@AlexA. Wait, really?

Calvin's Hobbies

194

quartata

Oh.

Anonymous

3:24 AM

Trufax: Peter is actually an AI residing on the SE servers

Doorknob

Mine's 3808.

Eridan

@quartata I was gonna say "Oh yeah, what's my avatar?" but then I realized that my name is my avatar :/

Zgarb

@Maltysen I'm guessing that (a, b, c) depends on some index n (so you actyally have (a_n, b_n, c_n) and the limit is as n goes to infinity), and then d_n = f(a_n, b_n, c_n) is just some number that depends on n. You can take its limit as usual.

quartata

@Eridan Your avatar is some weird purple cat thing

Doorknob

Yeah, 194 must be private-beta early. Or around that time.

quartata

3:24 AM

GOOD ENOUGH

Anonymous

I install so much random shit because of this site... Octave is the latest

quartata

@Mego You should have always had Octave installed.

Alex A.

Octave is useful software, not random shit :P

quartata

^

Doorknob

I don't have Octave. :(

quintopia

3:25 AM

should i install octave if i already have matlab installed?

Alex A.

apt-get octave

quartata

I actually had to use it for a lot of stuff.

Doorknob

@AlexA. install

quartata

I don't like programming in it, but it's still cool.

Eridan

@quartata Nope

Maltysen

3:25 AM

@Zgarb oh that's cool. But it still doesn't really explain what lets you take the lim of the distance function.

quartata

@Eridan I mean, I know what your avatar looks like...

Alex A.

@quintopia It has some syntactic advantages over Matlab

Eridan

It's the purple dude

quartata

That's good enough.

Doorknob

Description: GNU Octave language for numerical computations
 Octave is a (mostly Matlab (R) compatible) high-level language, primarily
 intended for numerical computations. It provides a convenient command-line
 interface for solving linear and nonlinear problems numerically.

Wait Matlab is R?

Alex A.

3:26 AM

har

quintopia

that's the registered trademark right?

Alex A.

Yes

Maltysen

@Zgarb Like for example can you take the lim of f(x) -> 0 of g(x)? Ignoring vectors

Alex A.

®

Doorknob

Oh hahaha

quartata

3:26 AM

It's a purple cat with bat-like ears, a helmet, spectacles and a scarf standing in front of a blackboard.

Doorknob

I thought that was like... nested parens or something... nevermind

quartata

Happy @Eridan?

quintopia

speaking of purple...

quartata

Come at me. Test my avatar knowledge.

Alex A.

@Maltysen You can take the limit of a function f as a value in its domain approaches another value.

quartata

3:27 AM

@quintopia Purple is my favorite color, give me some more

Eridan

It's a person with fins, a scarf, and a cape standing in front of... sure, that looks close enough to a blackboard

quintopia

@quartata about to

Doorknob

@quartata What's the avatar of user 1337, no cheating :P

quartata

@Doorknob Of someone I know...

Someone who frequents chat.

I don't know random users.

Anonymous

I think my Bernoulli challenge is up there on the list of challenges with the most wrong answers

Doorknob

3:28 AM

who is this

quartata

@Mego Nope, make your language unusable has more.

Alex A.

@Doorknob Brian Tompsett

quartata

@Doorknob Brian Tompsett some chinese characters

wow ninja'd

Doorknob

heh, nice

Alex A.

Professor of computer science

Anonymous

3:29 AM

@quartata Oh right I remember the fun I had with that one. That one guy and his Java solution that I kept breaking was fun.

Alex A.

At a university I think in England

Maybe Canada

Somewhere unamerican

Anonymous

Also Sp3000's clever solution for breaking the Python one

Maltysen

@Mego :(

Alex A.

Ah yes, University of Hull, UK.

quartata

@Mego No one ever noticed my kick-ass Enema solution

Alex A.

3:30 AM

> kick-ass Enema

>__>

Zgarb

@Maltysen Well, you can take the limit of g(x) as x -> 0. Or you can take the limit of g(x, y, z) as (x, y, z) -> (0, 0, 0). But the f(x) stuff doesn't really make sense.

quartata

@AlexA. OUT OF CONTEXT

Anonymous

Go home SE you're drunk

Maltysen

@Zgarb that's what I was asking: can you take the lim of g(x) as f(x) ->0?

because it makes no sense in the epsilon-delta definition

But my textbook was doing it with the whole lim as dist -> 0

Alex A.

3:31 AM

How is it specifying the distance?

Zgarb

@Maltysen Well ok, that makes sense for certain functions f, but not for others.

quintopia

what's the best way to compile c code on windows?

Anonymous

@Maltysen If g(x) depends on f(x), sure. If not, you could probably do something like lim [x->a] g(x) where a = lim [f(x)->0] x

Anonymous

@quintopia Install Linux

quintopia

@Mego you know as well as I do that that's the wrong answer.

Anonymous

3:33 AM

@quintopia Linux or Cygwin. Pick your poison.

Doorknob

Linux isn't poison >:(

quintopia

i may already have cygwin installed

Geobits

Why are you doing it on the windows? Can't you find a less fragile, more horizontal surface?

quintopia

@Geobits I took them out of the wall and laid them down on the kitchen table first

Alex A.

Hammer

Doorknob

3:34 AM

@quintopia 702 is hardly "terrifyingly small." :P

Zgarb

@Maltysen I have to go now, hope you find an answer somewhere.

Maltysen

@quintopia you can install gcc separately outside of cygwin

quintopia

@Doorknob then make it smaller

Maltysen

@Zgarb thanks for you help :)

Alex A.

@Zgarb <3

quintopia

3:34 AM

@Maltysen I would try that

Alex A.

@Maltysen I'm glad Zgarb has been able to help because I don't think I understand the formulation your textbook is using. I might recognize it if I saw it written down. Which textbook? I might have it...

Maltysen

the thomas & finney one actually

Alex A.

New Main Posts

0

Q: Golf a Purple Interpreter

Golf a Purple Interpreter Purple is an esolang which is designed with two main purposes: To be a minimization of Aubergine, since there just aren't enough self-modifying one-instruction languages around. To admit the possibility of terrifyingly small golfed interpreters. My first pass at a rea...

Maltysen

in the chapter about partial derivatives. Lesson "Limits and Conntiinuity"

Alex A.

3:36 AM

@Maltysen Authors are Thomas & Finney? What's the name of the book?

Maltysen

"Calculus and Analytic Geometry"

Geobits

@AlexA. You might be edging into creepy stalker territory...

Alex A.

@Geobits Edging? More like running head on.

Maltysen

Geobits

Sorry, I was trying to be polite :P

Maltysen

3:38 AM

he has a youtube channel:

youtube.com/channel/UCfG7W9cpOp4G4rH-gLgxVdw

Doorknob

why are we stalking this guy again

quartata

He's in this room, you know.

Doorknob

... does anyone dare to ping him? :P

Geobits

Doorknob has a youtube channel, too. Try finding that one, it's full of embarrassing stuff.

quartata

@Geobits haha

El'endia Starman

3:40 AM

At last, I have a totally correct and testable answer for the Bernoulli challenge!

Calvin's Hobbies

@Maltysen This is getting weird.

Doorknob

@Geobits I do?

Geobits

Yes, you do. Stop ruining things.

Doorknob

I... was not aware of this

Geobits

sigh

quartata

3:41 AM

I tried looking up keyboardfire and got some dumb music channel.

That's it.

Geobits

It's not under keyboardfire. IIRC it's WildGooseSnipe or something like that.

quartata

0

Q: Golf a Purple Interpreter

Golf a Purple Interpreter Purple is an esolang which is designed with two main purposes: To be a minimization of Aubergine, since there just aren't enough self-modifying one-instruction languages around. To admit the possibility of terrifyingly small golfed interpreters. My first pass at a rea...

code-golf interpreter

Alex A.

@Maltysen Okay, so the limit as the distance function between two vectors goes to 0, yeah?

quartata

I feel like someone could do this IN PURPLE

@quintopia confirm

Anonymous

@El'endiaStarman The post has been updated with B_n for n in [0,60]. I used Wolfram to generate them and Python to format them, so it's possible something got lost in translation - let me know if you see anything off.

quintopia

3:43 AM

@quartata Purple is Turing-Complete...so you can do anything in it as long as it's computable!

Maltysen

@AlexA. yeah

Alex A.

So you have f(x) where x is an n-dimensional vector, say x = (x1, x2, ... xn). And for some vector y, you want to find lim dist(x, y) -> 0 of f(x).

Maltysen

yeah

Alex A.

Think of x and y as points in n-dimensional space. Then x is approaching y (their distance is going to 0) just as a single variable would approach a point in a univariate case.

quintopia

@quartata The obvious way to write a Purple self-interpreter probably wouldn't work though

Maltysen

3:46 AM

@AlexA. no I understand the definition. I wasn't sure how the lim of g(x) as f(x) -> 0 would work

dist(a,b) is the f(x)here

Alex A.

You just have to reformulate it as a variable approaching a point (x -> y), which is equivalent to dist(x, y) -> 0.

Anonymous

Next question: How can I run Mathematica code without buying Mathematica?

Alex A.

@Mego Get Methamphetica, my FOSS implementation of Mathematica.

Maltysen

@AlexA. ok now I'm just curious about how the limit as f(x) -> 0 would work ;P

cuz the epsilon-delta definition would be like "for all f(x) such that f(x) within delta" and can you pick arbitrary f(x)'s?

Anonymous

@AlexA. linkydink?

Alex A.

3:51 AM

@Mego I was just trying to make a joke out of a reference to illegal drugs.

El'endia Starman

Ta-da!

2

A: Bernoulli Numbers

Minkolang 0.14, 97 bytes I actually tried doing it recursively first, but my interpreter, as currently designed, actually can't do it. If you try to recurse from within a for loop, it starts a new recursion. So I went for the tabulating approach...which had precision problems. So I did the whole...

I want a bounty for this. -_-

This was surprisingly hard. o_o

Anonymous

@AlexA. Oh, I'm (digitally) running around like a madman trying to collect stuff to test submissions, and I didn't get the joke :P

Anonymous

@El'endiaStarman How about a "good job" and a thumbs up?

El'endia Starman

And change that downvote to an upvote! :P

Anonymous

Already did

El'endia Starman

3:53 AM

Yayyy. :)

Alex A.

@Maltysen In general I don't think you can arbitrarily take the limit of a function as another function goes to 0, for example. But in this case you can say: For all e > 0, there exists d > 0 such that if 0 < |dist(x, y)| < d, then |f(x) - L| < e.

New Meta Posts

0

Q: So what actually defines something as a "new" programming language?

So the title pretty much says it, but I'll repeat: What actually defines something as a "new" programming language and not just a library of functions for an existing language? I know that golf languages like Japt and Pyth are written through Javascript and Python, but what makes them fundamental...

discussion

Maltysen

@AlexA. ohhhhh thanks so much! that clears it up.

Alex A.

So that makes sense now?

Maltysen

yeah

I was trying to plug it in to the epsilon-delta definition and that wasn't working. But this makes sense.

Alex A.

3:59 AM

:D

Transcript for