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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

anti-integral sentiment

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- Sat, 19 May 2018 20:55:41 EST 7K6K80ZQ No.15656
File: 1526777741014.jpg -(72899B / 71.19KB, 640x420) Thumbnail displayed, click image for full size. anti-integral sentiment
why do women hate math?
4 posts and 1 images omitted. Click View Thread to read.
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Lillian Fozzleshaw - Thu, 22 Nov 2018 23:07:42 EST 13EwkDw2 No.15716 Reply
>>15690
Yes but the best chefs are male. Your move, antifa
>>
Henry Billycocke - Wed, 20 Mar 2019 22:51:33 EST tscgkLF8 No.15721 Reply
>>15716

by what metric do you measure "best chef"? pay? michelin stars? size or numbers of business? numbers of employed? you see all of these are also deeply influenced by generations of gender roles in society being a part of the voluntary and involuntary conditionings and restrictions within the upbringing of females.

it is also bemusingly revealing that you mock someone who suggests women are underrepresented in mathematics for an outward, cultural reason rather than an inward deficiency, by calling them "antifa"?

"your move"? is this nothing more than a chess game of irony to you? reducing every possible random topic to its tenuous connection to politics, so you can huff and puff and beat your chest like a mighty brave conservative gorilla? why? do you truly believe you will convert any minds?

i think its pretty fucked up that you dismiss the entire concept of female under representation in certain fields of academia with a dismissive hand-wave of a chef trope, while taunting the liberal boogeyman of your feverish imagination

Tesseract

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- Wed, 20 Mar 2019 19:49:38 EST tscgkLF8 No.15720
File: 1553125778285.jpg -(31239B / 30.51KB, 1132x406) Thumbnail displayed, click image for full size. Tesseract
Ok so I've heard a tesseract described as being "like a cube, but in 4D." And people often say a tesseract is in the fourth dimension. I have a feeble understanding of the fact that it's like 6 cubes wrapped around into one, but how is that 4D? I thought the fourth dimension was time, or duration, a la the "ten dimensions explained" video. Could a tesseract not exist without the passage of time? What is a more accurate explanation of the fourth dimension, something you "fold through" to make wacky shapes like a tesseract, or the actual passage of time?

What's the biggest number?

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- Fri, 23 Sep 2016 09:54:08 EST XssdERJk No.15209
File: 1474638848911.jpg -(72632B / 70.93KB, 720x960) Thumbnail displayed, click image for full size. What's the biggest number?
Assume we had all the possible methods of information storage in the universe and all the resources of the universe at our whimsical disposal.

What's the largest number we could put down in some kind of recording before we ran out of universe?

So I guess the core question I'm asking is what's the most compact way to write large numbers? Is there anything that beats out scientific notation? And what's the greatest extreme to which we could conceivably take this?
51 posts and 6 images omitted. Click View Thread to read.
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Sophie Claybury - Tue, 11 Dec 2018 22:42:15 EST AQ7xCSUt No.15717 Reply
how high can you count?
>>
Augustus Tootway - Mon, 18 Mar 2019 02:31:42 EST MiFChTbJ No.15718 Reply
The biggest number is 9

STEM board

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- Thu, 01 Nov 2018 23:17:54 EST wEixRtMH No.15713
File: 1541128674493.jpg -(82993B / 81.05KB, 1280x720) Thumbnail displayed, click image for full size. STEM board
Incredibly slow board, maybe we should have /stem/
>>>/420/247062
>>
Rebecca Brumblefire - Tue, 06 Nov 2018 03:35:28 EST AQ7xCSUt No.15714 Reply
there are like 4 or 6 boards that make up stem

The Term(ak)inator

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- Sun, 25 Feb 2018 20:31:27 EST z4kZLurp No.15613
File: 1519608687520.jpg -(71509B / 69.83KB, 510x445) Thumbnail displayed, click image for full size. The Term(ak)inator
Are current Artificial-Intelligence/machine-learning projects harnessing the power of heuristic algorithms?
>>
Martin Sublingstock - Mon, 26 Feb 2018 14:24:39 EST ul+v22Tg No.15614 Reply
current AI learning projects have surpassed human understanding. we have bots who teach themselves via teacher bots but the methods are more of a pass/fail check and how the bot arrives at a passing grade no one knows
>>
Phineas Buzzman - Thu, 01 Nov 2018 07:00:28 EST b7eZ6RH9 No.15712 Reply
>>15614
I get tired of this "no one knows" thing which I feel is just a meme at this point. Just because these bots are learning faster than we can teach them and using languages that we find difficult to read doesn't mean their algorithms cannot be understood and used to teach humans how to perform the same operations.

I don't think any of these bots have been applied to or learned anything so complicated yet as to potentially require an unknown amount of time to grasp by humans. I'm not saying it wont happen eventually.

At least it's not as bad as the "Artificial intelligence" clickbait meme itself.

Advices for Mathematics Undergrad Student

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- Thu, 18 Oct 2018 08:03:00 EST ojtNcCTZ No.15696
File: 1539864180728.png -(233260B / 227.79KB, 496x349) Thumbnail displayed, click image for full size. Advices for Mathematics Undergrad Student
Hello guys.
I need your help. My first year in college is began boring me. I am mathematics undergrad student and I feel bored. Lessons are hard for me and I don't know how to work my lessons.
I need resources, working videos and something else.
I give you list of my lessons. I am waiting for your advices.

General Mathematics - Something like Beginning calculus, we use Adam's Calculus book. You can give advices for calculus and pre calculus.

Analytical Geometry

Abstract Mathematics

Physics 1 - 1 lesson for physics, we only see mechanics releated thing

I am depressed and my brain is crashing.

Last thing: I need cracked or free version of Maple 2015 or 2018. I use Linux.
>>
Lillian Pocklefuck - Sat, 20 Oct 2018 04:46:11 EST jg7MI6/F No.15707 Reply
You should stop saying you're bored when you mean you're challenged and finding it difficult.
Were you praised for cruising through highschool math without ever lifting a finger, and now you completely lack the ability to confront that? That is what it sounds like to me honestly (I tutored math undergrads for awhile and this happened a lot)
Talk to your advisor and your profs.
Nobody's going to provide you cracked software here, it's foolish to ask. Check maple's site if they have a demo, but likely you're asking because your course requires it, in which case your school probably has a license.

Get good sleep, get good exercise, forgive and love yourself.
>>
Martha Dartforth - Tue, 30 Oct 2018 21:20:05 EST wEJf0pZR No.15709 Reply
I went undergrad Physics, but there's obviously a lot of overlap with math. Here's a few things that helped me:

https://www.khanacademy.org/
A bit obvious because I think everyone knows Khan Academy by now. Sal's videos are informative, but he gets kinda spergy about certain things and goes on tangents, so they can get a little difficult to follow. Overall pretty helpful.

http://patrickjmt.com/
This guy does amazing videos, much better organized than Khan and he does really great example problems.

Superman Prime

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- Thu, 18 Oct 2018 19:38:58 EST bWRuE3ZW No.15697
File: 1539905938116.jpg -(74839B / 73.08KB, 568x438) Thumbnail displayed, click image for full size. Superman Prime
The largest mersenne prime starts with 738905609893065022733042746057570078131803155705518473240871278225225737960790577633843124850791217947737531612654788661238846036...-+1 It's the largest prime you can approach with computation.

Have a nice day.
5 posts omitted. Click View Thread to read.
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Simon Nirringford - Thu, 18 Oct 2018 20:16:17 EST bWRuE3ZW No.15703 Reply
So, in order to represent every prime possible you need a dimensional complexity equal to the limit of gamma(x) as x goes to infinity. Let's keep in mind that complex numbers has a dimensional complexity of 2 and octionions of 8.
>>
Simon Nirringford - Thu, 18 Oct 2018 20:18:14 EST bWRuE3ZW No.15704 Reply
>>15703
Imaginary numbers are useful for giving real numbers extra smoothness... But any expert can tell you that imaginary numbers are completely useless. Any imaginary number that exists can be represented by two reals.

This is law.
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Simon Nirringford - Thu, 18 Oct 2018 20:36:14 EST bWRuE3ZW No.15705 Reply
2^x as x goes to infinity can also be represented as a number near e^e with magnitude I've left unspecified.

Dabble

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- Tue, 21 Mar 2017 08:41:37 EST 6dRMI9a4 No.15425
File: 1490100097900.jpg -(73609B / 71.88KB, 600x400) Thumbnail displayed, click image for full size. Dabble
I have hardly a basis for math and forgot most of it anyway.
I'd like to get my math level a bit up, it seems like fun now

How do i start?
3 posts and 1 images omitted. Click View Thread to read.
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Isabella Singerhidge - Thu, 19 Apr 2018 16:12:23 EST aQB82KvS No.15644 Reply
are you good with geometry? thats pretty foundational to higher math. trigonometry specifically is like, the bridge to a bunch of crazy shit
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Lydia Bezzlewater - Tue, 02 Oct 2018 02:02:37 EST jv54YqLK No.15693 Reply
>>15642
this hit me and my unused math BS right in the sad bone

Plz Halpz

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- Wed, 12 Sep 2018 12:35:45 EST KKaDJ32c No.15685
File: 1536770145526.jpg -(64316B / 62.81KB, 500x540) Thumbnail displayed, click image for full size. Plz Halpz
So yeah this is for a test coming up, but it's not even in the book.
Nobody will probably answer in time, test is tomorrow (don't even know if this will come up), but I'm still curious how one would solve this:

For function ƒ where ƒ(x) = kx + m it's true that:
ƒ(x+4) - ƒ(x) = 2
and also
ƒ(m) = 6

Wanted answer is the ƒ itself.
My brain is full of fuck just trying to get a grip.
Any tips of direction would be greatly appreciated.
We've done solving for parts of it but never add/sub by ƒs themselves.
1 posts omitted. Click View Thread to read.
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Hedda Gazzlekot - Thu, 13 Sep 2018 01:27:30 EST tZxUrG1r No.15687 Reply
>>15685

Googling random shit will only take you so far. f(m)=6 tells you that km+m=6.

So m(k+1)=6.

Now the f(x+4)-f(x)=2 part. Plug in x+4 for x in to f(x)=km+m for the first one.

k(x+4)+m-(kx+m)=2

Distribute and cancel things out.

4k=2, so k=1/2. Now remember that we know m(k+1)=6. So we can plug in k=1/2 and solve for m.

This is a system of two equations with two variables (k and m for you) so you can solve it for a solution by taking one of them and solving for it, then plugging it back in to the other.
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Hedda Gazzlekot - Thu, 13 Sep 2018 01:31:12 EST tZxUrG1r No.15688 Reply
>>15687

The trickiest part of this is figuring out what f(x+4) is. The x+4 is replacing the variable x, so every occurence of x you replace with (x+4) *with the parenthesis*. Also with f(m)=6 it might make you want to think, oh ok, so m=6. But the same thing is true, you have to replace x with m to get km+m=6.
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Jenny Blemmlekone - Sun, 16 Sep 2018 12:51:28 EST KKaDJ32c No.15689 Reply
1537116688785.jpg -(28394B / 27.73KB, 196x270) Thumbnail displayed, click image for full size.
>>15687
>>15688
Thank you very much! Gonna give it another go in a bit with your replies in mind.

Thankfully this wasn't on the test, but even so, stuff like this that's related to what you're already doing but you don't have any idea how to go at it makes you so hungry for getting a grip on it.

Improving my math skills

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- Tue, 21 Aug 2018 07:10:17 EST 8YC3dOvK No.15680
File: 1534849817746.jpg -(37454B / 36.58KB, 680x680) Thumbnail displayed, click image for full size. Improving my math skills
Hello, I am a high schooler (non-american) with a weak base in mathematics. I want to get good at mathematics, physics and chemistry for future studies. Like I mentioned, my math skills aren't very good, my physics and chemistry are quite weak aswell.

I want to get good grades in the upcoming tests, and I thought of doing some drug to enhance my studies. Is this stupid? I feel like I could learn 10x what I would learn sober
>>
Henry Sellystone - Tue, 21 Aug 2018 10:22:32 EST /j1eU+l7 No.15681 Reply
Study High
Test High
Get High Scores
>>
Caroline Surrystock - Thu, 30 Aug 2018 18:16:45 EST KKaDJ32c No.15682 Reply
>>15680
I dunno if drugs would be a good idea.
But you could jedi math tricks, like chewing a specific flavour of gum every time you study math and then chew the same gum (if you're allowed to) while taking the tests. It's like pavlovs dogs but on math, instead of salivating you expept to do math so brain brings forth what it needs to solve math.

Most mathish drugs would probs be stimulants, but most don't have the willpower for it. Most report back that they just masturbated for 12 hours instead and got nothing done at all, even if they'd have done at least some work sober.

Hey Neeeeerd

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- Sun, 23 Jul 2017 18:23:32 EST n3nShEOS No.15542
File: 1500848612257.jpg -(59386B / 57.99KB, 580x407) Thumbnail displayed, click image for full size. Hey Neeeeerd
Why do you post here? Wouldn't it be easier to go to a forum or something that is specifically created for mathematics discussion? Why do you post here and wait like 4 weeks for a reply from some stoned hippy when you can go somewhere else for quicker and more informed input?
10 posts and 1 images omitted. Click View Thread to read.
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Charles Paffinghall - Thu, 22 Mar 2018 22:05:30 EST 5jiNtEAL No.15637 Reply
>>15542
for the same reason jesus hung out with hookers and leppers, because he was one
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Martha Bobberhall - Thu, 29 Mar 2018 05:39:35 EST suE+DM+5 No.15639 Reply
i ' m f u c k i n g h i g h , m a a a a n n n n n n n n n
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Wesley Dollerdidge - Thu, 21 Jun 2018 21:08:03 EST RDREtx1H No.15672 Reply
>>15610
combine math with tinfoil, because thats all math is at this point, a conspiracy theory

Is there a formal way of representing "currency denominations?"

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- Sun, 20 May 2018 16:15:17 EST KdxuUdQ5 No.15657
File: 1526847317954.gif -(772771B / 754.66KB, 380x285) Thumbnail displayed, click image for full size. Is there a formal way of representing "currency denominations?"
I've recently been trying to write a tail-recursive program which counts how many different ways `x` amount of money can be made using `y` denominations of currency.

I started making progress when I noticed that my denominations didn't need to have different values. They could all be worth the same amount, and the program would still work correctly. It seemed a little odd to me, that I was generating unique combinations of things that all had the same integral value. On my computer I just see:

f( 1 ) = 1
f( 2 ) = 1
f( 1 ) =/= f( 2 )

^and that makes me a little uncomfortable. Now, because these kinds of rules are actually really useful inside of my computer, I was wondering if they've been rigorously studied by mathematicians. Is there a name for these things? Are there papers I can read?
4 posts omitted. Click View Thread to read.
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Fanny Fupperford - Sun, 03 Jun 2018 02:26:17 EST 3oORF0f9 No.15667 Reply
1528007177643.gif -(1560B / 1.52KB, 174x14) Thumbnail displayed, click image for full size.
>>15664
Wolfram alpha says the thing what I am dealing with is called a "frobenius equation" which is a kind of diophantine equation where the coefficients and solutions must be non-negative integers.

I do have a textbook on discrete mathematics, but unfortunately the words "diophantine" and "frobenius" appear nowhere in the index.
>>
Fuck Sickledodge - Mon, 18 Jun 2018 16:39:08 EST DSHkuT0l No.15671 Reply
>>15668

If you want to solve these with a computer you could try one of the various math suites. Some of them support calls from other languages, so if you want to write your Python program and then call something else to solve your equation and give back some solutions as a list it shouldn't be a problem.

Considering switching majors because I feel stupid.

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- Fri, 01 Jun 2018 04:10:31 EST 8qcGgPl+ No.15665
File: 1527840631174.jpg -(584441B / 570.74KB, 1920x1200) Thumbnail displayed, click image for full size. Considering switching majors because I feel stupid.
Hey there /math/. So to make a long story short, I'm retaking Trig in school and now is the second time I'm doing poorly in the subject. I studied every day for a week for the last test and got a 62% (D). While it was a fantastic blow to my self esteem, I really don't want to give up on my major (CS) and change to accounting. I'm worried if I don't nip this in the bud now I'll never get anywhere.

I know I'm learning incorrectly. I genuinely enjoy mathematics and programming, thought I feel like once I get to discrete and calculus I'm going to be fucked.

Are there any methods/books/sites you recommend to learn math in way where you understand it? Once I get a concept down it's cake, I just seem to take longer than I think is normal to understand it.

Thanks in advance.
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Nicholas Sinningshaw - Fri, 01 Jun 2018 05:17:43 EST drSlH/C1 No.15666 Reply
>>15665

How are you studying? Any textbook for trig that you are told to get for the class should be decent. CS shouldn't require you to take more than a few calculus courses and the discrete course too. Are you struggling with the trigonometry or more fundamental stuff?

Make sure you read the section in the text before attempting problems, and the examples too. Most math classes won't have a problem on the test that isn't similar to something that was on a homework assignment, at least in the concept you used. I think the biggest mistake people make in math classes like this is just attempting the problems with what they know and could sponge from the lecture without reading the actual section in the book.

I'd suggest reading all the examples you have then attempting problems. The khan academy is a good place for videos. I watched their videos on stuff when I was learning calculus and it helped me. I wouldn't spend too much time on their exercises though, because as I said the stuff on your tests is going to be coming from your book and homeworks.

If you can't find a solution to a problem or two, write it down and take it to your instructor's office hours. The college you're in pays people just to sit their and wait for people to come in with questions like that, don't feel that you have to have a really tough problem or that you're burdening them. Most places should have a "math lab" type place where there tutors in a big room where you can bring your work and let them know if you're having trouble, they'll come over and get you pointed in the right direction most of the time.
>>
Martha Manderbury - Sun, 03 Jun 2018 12:28:56 EST sR7kJ2DP No.15669 Reply
It’s ok man. Your brain works like a muscle and sometimes you just have to give it a lot of exercises to make it a strong muscle. Then you’re good.

Read through the chapter, take notes and highlight (highlighting alone doesn’t actually do anything to help you learn but it never hurts). Follow all the examples. Review your notes and work the exercises. Don’t look at the answer until after you’ve tried it. It’s tougher but you’ll get more out of your studying that way.

I think your problem is just focus, which is not uncommon.
Also Khan Academy is great for visualing concepts and I recommend it to anyone having trouble.

how i relearned erry mathsz

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- Fri, 05 Feb 2016 02:37:19 EST mVsq12K/ No.15040
File: 1454657839252.png -(56956B / 55.62KB, 722x768) Thumbnail displayed, click image for full size. how i relearned erry mathsz
Everyday before work, I woke up 2 hours early and forced myself to read/do exercises of the following books. (this later became 3 hours). I averaged 3 books per month if they were survey books, and about 1-3 months for a rigorous book. This became an easy routine after the first week, and I'm still doing this.

>1) Daily Rituals by Mason Currey
https://books.google.ca/books/about/Daily_Rituals.html?id=hA-MoAEACAAJ
This is where I got the idea of making a routine from, it's a survey of historical artists, philosophers, scientists ect who all had a routine in order to get work done consistently. Franz Kafka would split his sleep up into 2 section in order to fit in work beside his regular office job.

>2) Basic College Mathematics by M. Lial et all
https://books.google.ca/books?id=ucUDMAEACAAJ&dq=basic+college+mathematics
As mentioned before in here this covers elementary school and Jr. High math basically. You can just survey this for the most part (not do any exercises) unless you don't understand something, then do the exercises. Took 3 days to survey this. When I later took Harvard's CS50 computer science course, the first lecture about Binary numbers directly was related to this book's first chapter on whole numbers. I torrented this book.

>3)Basic Mathematics by Serge Lang
https://books.google.ca/books?id=gBtvo480ng4C&dq=basic+mathematics
I got out the notepaper and did most of the exercises by hand. This was all focused on reasoning, why is this true, how do we prove this is true, ect. This book teaches you so well that applied calculus is your bitch afterwards. I torrented this book too since author dead, copies are like $80 on amazon.

>4)Introduction to Mathematical Reasoning by Eccles
https://books.google.ca/books?id=ImCSX_gm40oC&dq=mathematical+reasoning&source
Pretty much essential book, this should be required reading for anybody going to university. I downloaded this from libgen.io (library genesis, domain often changes due to copyright lawyers). At the same time as reading this, I watched the following:

A supplemental MIT lecture that explains wtf calculus actually is
https://youtu.be/UcWsDwg1XwM Calculus: Big Picture.

18.01 Single Variable Calculus lectures
https://youtu.be/jbIQW0gkgxo which I breezed through since Serge Lang's book + Intro to Mathematical Reasoning prepared me so well for this. I didn't do any exercises except for whatever following a long with the lectures which I often solved myself by pausing the video, doing them then watching him work out the answer. I finished this in a week doing it every morning.

Continued .........................
25 posts and 7 images omitted. Click View Thread to read.
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Ernest Claystone - Mon, 21 May 2018 10:51:24 EST hr6uWBv0 No.15658 Reply
im gonna make use of this one day
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Sophie Dicklestone - Tue, 29 May 2018 17:55:46 EST sR7kJ2DP No.15661 Reply
Honesty self-learning is the only way to learn math.
Coming from a guy who has an MS in math, you can only get so much out of taking a class on anything quantitative. It’s still you who has to work the homework and read the book.
I’m currently studying for my actuary exams and gotta study hours a day for it. It gets easier and easier over time.

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