The Nineteenth Byte

Okay, there's something I'm confused about. To do P+Q, you find the third intersection point, R, of the line through P and Q with the curve. But their sum is not on the line, but rather, it's on the other half of the curve (mirrored over the x-axis). I get why, it's because P+Q+R = 0, because a line through those three points on the curve doesn't intersect again and goes off to infinity, which is the additive identity, therefore P+Q = -R.

CoolestVeto

7:24 PM

And so my watch begins...

El'endia Starman

I'm confused, though, because the math and graphics aren't matching up conceptually like I want them to. :P

CoolestVeto

@CoolestVeto (blue blocks in Eclipse are "TODO" blocks)

flawr

@El'endiaStarman Well you did understand it perfectly=)

What graphics are you referring to?

Oh ok, I see now.

El'endia Starman

I'm trying to figure out a better way to order the concepts of the "How does the Addition work?" section.

flawr

I just didn't find any better graphics online.

El'endia Starman

7:26 PM

The graphics in the post are fine.

It's that the addition of two points is not on the line. It works out mathematically, but makes no sense. :P

I'm trying to figure out how to make it make sense. :P

flawr

@El'endiaStarman Well if you would not mirror the last point, you would lose associativity.

El'endia Starman

Okay, a point at infinity is the additive identity because the result of adding 2 points is the same regardless of whether you add the point at infinity or not.

flawr

Yup.

(The "infinity" comes from the fact that in the challenge, we looke at the curve in an affine plane, but you would usually consider elliptic curves in the projective plane. That is where you get the "infinity" from.)

El'endia Starman

ah-huh, that makes sense

GamrCorps

Yay! My first usecase for my new golfing lang! codegolf.stackexchange.com/a/75377/36670

flawr

7:44 PM

Should I add coments like those? Or would they only result in a bigger confusion?

@El'endiaStarman

PS: I found what I think is a better versoin of those images, don't oyu think?

TimmyD

TIL - "chipotle" is "dried jalapeño"

El'endia Starman

@flawr Yeah, that's better.

flawr

Are you editing right now or can I add those?

El'endia Starman

@flawr If you don't mind, I'm just going to rewrite the "How to add" section.

I'll add it.

flawr

Ok, great, thanks!

Alex A.

7:58 PM

@TimmyD Really? Interesting, I had no idea.

flawr

Oh hi alex=)

Alex A.

Hello!

Book recommendation for you, @flawr: Ray Bradbury's Frost and Fire.

flawr

*adding that to my TBR*=)

PS: chat.stackexchange.com/transcript/message/28186965#28186965

Alex A.

@flawr Holy shit this is amazing

TimmyD

16

A: Besides raisins, what other dried fruits and vegetables have their own names?

A number of Spanish names for chili peppers have migrated into English (at least in parts of the western and southwestern United States, where many types of chilies are sold in fruit and vegetable markets). Three varieties of these peppers have different names when fresh and when dry: poblano c...

Alex A.

8:05 PM

@TimmyD whoa

I learned so much

Optimizer

2+2?

Alex A.

Still don't know that one

Optimizer

:( still searching or someone who knows that one

flawr

@Optimizer I'm quite sure it is 0,1 or 4.

Morgan Thrapp

C'mon, it's 5.

Optimizer

8:10 PM

doesn't help

TimmyD

It's five.

380

Q: Write a program that makes 2 + 2 = 5

Write a program that seemingly adds the numbers 2 and 2 and outputs 5. This is an underhanded contest. Your program cannot output any errors. Watch out for memory holes! Input is optional. Redefining 2+2 as 5 is not very creative! Don't doublethink it, try something else.

@Optimizer ಠ_ಠ

XD

the real reason we code-golf here

Alex A.

8:13 PM

wat

Optimizer

nananananananana

Alex A.

I think you're missing a ba at the beginning.

Optimizer

batman

Alex A.

Optimizer

@AlexA. dude! you dont know the batman song?

Alex A.

8:14 PM

Banana man

Optimizer

How Ant-Man Should Have Ended

►

Alex A.

@Optimizer Of course I do, I was kidding.

flawr

@El'endiaStarman Still editing?

TimmyD

@NathanMerrill Do zeros weigh less than ones?

El'endia Starman

@flawr Yep, almost done because I have to leave quite soon.

Sherlock9

8:17 PM

@flawr I consider myself a math geek and I'm lost :P Though, to be fair, I haven't attempted learning elliptic curves

Optimizer

@TimmyD not sure. But spaces weigh less than tabs for sure

shots fired

TimmyD

:D

ETHproductions

0x20 > 0x09

Just sayin'.

Alex A.

@Optimizer \o/

Optimizer

@ETHproductions that's ASCII code. not weight

ETHproductions

8:20 PM

@Optimizer How do you weigh an ASCII char?

I suppose 0b00100000 is more eco-friendly than 0b00001001

El'endia Starman

Okay, done @flawr.

Optimizer

@ETHproductions throw them in water, the one which drowns first, is heavier

flawr

@El'endiaStarman Thank you very much!

So much better now!

ETHproductions

@Optimizer I'd rather not try that. I like my computer.

flawr

So you think I should include some explanations e.g. why 4A^3+27B^2 ≠ 0 is so important, and what happens for p=2,3 e.t.c?

ETHproductions

8:34 PM

So, I have a new esoteric language that's like a 2D language, but the source code is wrapped around the outside of a cube.

I'm trying to think of a good name so I can create a GitHub repository for it. Suggestions?

TimmyD

^3

Maltysen

cube twister

cubagony

ETHproductions

@Maltysen Martin said he wanted to make a language like mine, but based on a Rubik's cube so the code can be twisted at runtime. So I'll let him use that name if he wants

TimmyD

code³

Alex A.

@ETHproductions Cubert

ETHproductions

8:36 PM

@Maltysen Maybe

@AlexA. haha, that's good

Maltysen

@TimmyD that's pretty nice

Easterly Irk

@crayzeedude It was 9:30, I got up late. Homeschool has benefits.

But now its chem... :((

flawr

@EasterlyIrk You are at home at a school?

TimmyD

Codahedron

Easterly Irk

Yes.

crayzeedude

8:38 PM

@EasterlyIrk ahhhhh

Easterly Irk

@flawr Yes.

But the converse is also true.

flawr

You are a school at a home?

ETHproductions

@TimmyD Interesting...

flawr

@EasterlyIrk So how does taht work, do your parents teach you? Do you have some kind of private teacher?

ETHproductions

Cubode, maybe?

Not as catchy

TimmyD

8:42 PM

Cubed

Short and simple

ETHproductions

Nice

I like it

flawr

@TimmyD Reminds me of this cutie-pie:

Eurocopter X3

The Eurocopter X³ (X-Cubed) is an experimental high-speed compound helicopter developed by Eurocopter (now Airbus Helicopters). A technology demonstration platform for Eurocopter "high-speed, long-range hybrid helicopter" or H³ concept, the X³ achieved 255 knots (472 km/h; 293 mph) in level flight on 7 June 2013, setting an unofficial helicopter speed record. == Design and development == === Technology === The X³ demonstrator is based on the Eurocopter AS365 Dauphin helicopter, with the addition of short span wings each fitted with a tractor propeller, having different pitch to counter the torque...

Martin Büttner

@ETHproductions is it going to support Rubik's Cube permutations? :P

crayzeedude

@flawr people who are homeschooled are usually taught by their parent(s)

or sometimes by a private tutor

ETHproductions

@MartinBüttner Not planning on it

Martin Büttner

8:44 PM

Oh just saw your message about that.

I don't think I'll be doing that any time soon.

Feel free to take it if you want.

ETHproductions

OK, I'll think about it.

TimmyD

@flawr That's an interesting design.

ETHproductions

My language is currently crazy enough as it is, but maybe there's room for rotations like that.

So, Cubed it is! (Unless anyone has a better idea)

Martin Büttner

well, if you don't make them necessary then it might not be a problem

e.g. you can use Labyrinth perfectly fine without the (similarly confusing) grid rotations

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Parse default arguments code-golf Many languages have the concept of default/variable arguments. It basically means you can have a function that when given too few arguments, will fill in the missing arguments with specified values. For example, you can do the following in Python: WARNING: THE...

TimmyD

8:49 PM

But the grid rotations is what makes it neat.

Confusing, yes, but neat.

._.

@TimmyD :)

god, i can smell butter while watching that video

Maltysen

@Optimizer wow that was a pretty creative ending to the video

Alex A.

9:01 PM

@ETHproductions Cubert

flawr

@AlexA. Q*bert

Alex A.

That's what I was intending to reference :)

Strawpoll

Can I -1 "Cubagony"?

Kyūb

9:06 PM

WÜRFELSPRACHE

4

Alex A.

I'd also like to -1 Cubagony

Martin Büttner

Würfel

damn, ninja'd

Alex A.

Waffle?

Martin Büttner

translate: Würfel

(from German) Cube

ETHproductions

@MartinBüttner If you could, yes

Alex A.

9:06 PM

translate ja: Cube

(from English) キューブ

ETHproductions

I'll just say that Cubagony has a score of -2

flawr

translate: Würfel
(from German) Dice

Alex A.

Kyūbu

@ETHproductions Technically 0 because it has +2 in the poll and -2 in here

flawr

Jūbu

ETHproductions

So Cubert is the only name with a positive review

Alex A.

9:08 PM

translate: WÜRFELSPRACHE

(from English) WÜRFELSPRACHE

Martin Büttner

lol

Alex A.

Bing ftw

Lynn

Is this translate thingy automatic?

translate: kubus

Martin Büttner

mods only :P

Alex A.

It's a mod power

Lynn

9:08 PM

If only.

Alex A.

Ninja

Martin Büttner

@AlexA. "Würfelsprache" just means "Cube/dice language" and is as made-up as the English phrase

Alex A.

@ETHproductions Looks like you're stuck with Cubert. ;)

flawr

Or in dependence on Brotli / Zopfli, why not Wurfeli

Alex A.

@MartinBüttner Oh, okay.

translate: Würfel sprache

(from German) Cube language

ETHproductions

9:09 PM

If I were going to make a language called Cubert, I'd rather it be more similar to the game Q*bert. But maybe I'm the only one who thinks like that.

Alex A.

¯\_(ツ)_/¯

ETHproductions

It's more catchy, anyway

Alex A.

That feeling when it recently rained hard and your deck is covered in tree shit so you sweep it off then it starts to rain again ._.

CoolestVeto

strawpoll.me/7054613

Martin Büttner

ummm

Alex A.

9:11 PM

^

CoolestVeto

OH NO I FORGOT TO ADD CUBERT

TimmyD

Woop woop. Sub-1500 in the Dyalog 2016 challenge.

Alex A.

@CoolestVeto Waffle sprack

ETHproductions

@CoolestVeto I was just gonna say...

Martin Büttner

@CoolestVeto and the others in this one strawpoll.me/7054543

ETHproductions

9:13 PM

@TimmyD Oh, how'd I miss that this was a name suggestion? :P

flawr

> Your mom is so classless she's a marxist utopia

Alex A.

@CoolestVeto? More like rektest vesto.

flawr

> Your mom is so classless she's C

Alex A.

haha

TimmyD

@ETHproductions :D

Martin Büttner

9:14 PM

@flawr I'd post some ASCII art of the beard that joke has, but it would be too long for the character limit.

CoolestVeto

kek

ETHproductions

@Cool Are you making another poll, or shall I?

CoolestVeto

@ETHproductions Go ahead. :P

Optimizer

@flawr or python?

ETHproductions

strawpoll.me/7054681

flawr

9:17 PM

@Optimizer I thought python has classes?

Optimizer

idk

flawr

I'm sure python is supposed to be OOP

Maltysen

its very oop

everything is an object

Lynn

A fun thing: denote the rational number 2^a 3^b 5^c 7^d ... by its list of (positive or negative) prime exponents [a, b, c, d...]. Then consider functions f : ℤⁿ → ℤ for which f(0, ..., 0) = 0. Then define f* : ℚⁿ → ℚ by f([a₁, b₁, c₁, ...], ..., [aₙ, bₙ, cₙ, ...]) = [f(a₁, ..., aₙ), f(b₁, ..., bₙ), f(c₁, ..., c₂), ...]

Essentially, take a function and vectorize it over prime exponent lists.

+* is multiplication. min* is gcd, and max* is lcm.

Alex A.

@Maltysen You might even say it's Pure OOP.

ETHproductions

9:19 PM

For the record, I'm probably not going to go with Würfelsprache or キューブ because I want it to be short and memorable, mainly to English speakers

Vihan

@ETHproductions what does "Würfelsprache" mean?

@Vihan Cube language

@AlexA. ಠ_ಠ

haha

11 mins ago, by Alex A.

(from English) WÜRFELSPRACHE

Vihan

9:19 PM

@AlexA. I am getting "dice language" from google translate

Martin Büttner

cube and dice are both "Würfel" in German

Lynn

Those last two assume you limit it to non-negative exponents, I suppose

Alex A.

Martin says waffle is cube, flawr says waffle is dice

flawr

@Lynn Nice thing you noticed=)

Martin Büttner

(as is "cubes" and "die")

Maltysen

9:20 PM

> waffle

flawr

But I think it is quite well known in number theory=)

Why don't you call it DieWaffleDie?

Maltysen

Wafflelang

or just waffle

Alex A.

Wafflish

Vihan

@ETHproductions you could call it Cubix

flawr

Wafflang

Lynn

9:21 PM

@flawr You can prove some things about that operator in general, and then gcd(a, b) * lcm(a, b) = ab is as clear as min(a, b) + max(a, b) = a + b.

flawr

@AlexA. Walfisch

Martin Büttner

lel

Alex A.

translate: walfisch

(from German) Whale

haha

ETHproductions

Any more votes? You can pick more than one if you want. strawpoll.me/7054681

TimmyD

Is it based on a language?

ETHproductions

9:21 PM

@Vihan Another interesting idea

@TimmyD what is?

@ಠ_ಠ ಠ_ಠ

^

This cube language we're discussing.

Alex A.

It's based on cubes and languages

And waffles

TimmyD

9:22 PM

Like how Pyth is kinda based on Python.

flawr

Why don't you call it [0,1]^3?

ETHproductions

@TimmyD It's not really based on anything, although it was half-inspired by Hexagony

Martin Büttner

\o/

ETHproductions

I'm making it in JS because I don't know anything else :P

flawr

@ETHproductions Well if it is halfway inspired, then it should be Triagony.

ETHproductions

9:23 PM

And also JS lends itself nicely to online interpreters.

Lynn

@flawr Does it have a name, in general? I know the gcd/lcm thing isn’t novel – “min/max on the exponents” is a quite common definition of those. But perhaps you can extend it to some other functions and get interesting results.

Martin Büttner

@Lynn what's median of three? :)

ETHproductions

@flawr Martin started one called Triptych based on triangles, IIRC

flawr

I do not think so, but you can find it quite often in arithmetic functiosn.

Hexagony -> Tripity

ETHproductions

^

Vihan

9:25 PM

@ETHproductions s/I don't know anything else/it's the best/

flawr

> "If you put a million monkeys at a million keyboards, one of them will eventually write a Java program.

The rest of them will all write Perl programs."

12

Lynn

@MartinBüttner lcm(gcd(a, b), gcd(lcm(a, b), c)), I’d guess

ETHproductions

By the way, the other day I was thinking about what 0-operand operators should be called, when I came across this revelation:

4 -> quadnary
3 ->  trinary
2 ->   binary
1 ->    unary
0 ->     nary

Martin Büttner

yeah, except they are called nullary

(which I'm not a huge fan of though)

ETHproductions

oh bother

Lynn

9:27 PM

That step latter is neat though

However, I’ve never heard quadnary

CoolestVeto

thatmichaelpark.github.io/fractal-jigsaw-puzzle

Martin Büttner

but nary would probably be confused with n-ary

ETHproductions

@Lynn I've only heard it recently

@MartinBüttner true

flawr

@ETHproductions nary might be confused with n-ary

Martin Büttner

yeah, that should be quaternary I think

TimmyD

9:27 PM

So you're saying there's ...
( •_•)
( •_•)>⌐■-■
(⌐■_■)
nary an operator.
♫YEEEEEAAAAAHHHHHHHH!♫

flawr

ninjenga

> Yo momma so fat that the recursive function to calculate her weight causes a stack overflow.

ETHproductions

Alright, I'm going back to working on Würfelsprache now

Martin Büttner

@flawr ...

Sherlock9

@Lynn This is fantastic. Wonder what the Euler totient function and the Carmichael function would look like?

Martin Büttner

If you wanna make yo momma jokes, at least make funny ones.

TimmyD

9:29 PM

Rekt

ROASTE
D

Martin Büttner

> yo momma so stupid, she rotates the square in Tetris

TimmyD

etc.

ETHproductions

@MartinBüttner And this is the part where the other person says "I didn't make it up, I found it on yo momma's website"

Lynn

Another really good one: you can sort of cheat and do it a function ℕ → (ℕ, ℕ) as well!

Sherlock9

Yo momma so fat, LIGO can detect gravitational waves when she moves around

Martin Büttner

9:31 PM

hey, at least that's a new one.

Optimizer

yo momma so slow, even time travel doesn't help.

Maltysen

yo momma's so fat that she lives in 5 different zip codes

Optimizer

old

TimmyD

> Yo momma so fat ... she should go to a doctor because we are all concerned about her health.

Martin Büttner

Timmy wins

flawr

9:33 PM

I'm sure your moms are quite nice.

Optimizer

what a joke

Lynn

Then, vectorizing x → divmod(x, 2) over prime exponents gets you the “square root simplification” function.

Optimizer

@flawr ( ͡° ͜ʖ ͡°)

Lynn

That is, decomposition into (the square root of) a square and a square-free number.

(It maps 162 → (9, 2) because 162 = 9√2.)

Sherlock9

@MartinBüttner I've heard nary a peep of nullary :P

CoolestVeto

9:36 PM

> yo momma so fat that time bends for her, which compensates for how slow she is

TimmyD

> For a good time call ... your mom. She is a nice lady and worries about you. She wants to make sure you're safe.

Lynn

This mentions a ‘coreₙ’ function that corresponds to my (x → x mod n)*

Sherlock9

Yo momma so fat, she perturbs Jupiter, Saturn and Uranus in their orbits, and every time she moves an arm, it takes weeks for astronomers to compensate for it.

CoolestVeto

> yo momma so harsh and fat that she owns uranus

Alex A.

Yo mamma so sweet, she made cookies the last time I came over.

7

Easterly Irk

9:40 PM

@flawr Mom and math tutor who I go through geometry and precalc.

@AlexA. You like cookie baking mommas.

flawr

@AlexA. No diabetes jokes?

Maltysen

@EasterlyIrk what happened to algebra II?

flawr

@EasterlyIrk Do you like it that way?

Alex A.

@EasterlyIrk Idk, I like my mom and she makes cookies. ¯\_(ツ)_/¯

@flawr haha

Easterly Irk

@Maltysen Skipped.

The algebra 1 I took covered most, and precalc covers the rest.

@AlexA. same.

@flawr yes.

flawr

9:42 PM

Pi day special: PI MUST DIE !!!

►

CoolestVeto

o-o

Alex A.

Oh, it's almost π day, which means it's almost time to rewatching Pi.

Easterly Irk

ಠ_ಠ to the capital pi.

TimmyD

Have we had a repeating digit base-conversion question? I can't seem to find one. ... Meaning like how 55 repeats digits in base 10, but 90 repeats digits in base 14 (66) ... Challenge would be to find a base in which input x has repeat digits, or output a falsey value.

Easterly Irk

@AlexA. brownies are better.

flawr

9:46 PM

Aren't brownies ⊂ cookies?

Easterly Irk

@MartinBüttner When my brother started making stop motion videos, I showed my family your happiness film, they loved it. :P

Martin Büttner

Glad to hear that, thanks :)

Maltysen

@EasterlyIrk link 404ing

now it works