Math is hard.

:)) finally a good answer

"I won't need math to make games!"

do math majors graduate with degrees or
radians?

These "math question" captchas are really stupid.
It's not even an image that has to be OCR-ed, it's just plaintext. Why can't these people understand a captcha is supposed to be something only a person can do? This is math. Computers are amazing at math.

Math teacher: 1+1=?
Me: one zero
Math teacher: wrong!
So i gived to her my calculator (in binary mode :-) )
Me: check the answer.
Math teacher: [saw 1+1=10 on calc] thinks about 10 seconds LOL then says: you calculator is broken!

When you're thinking about your code when doing math homework, but then realize you're accidentally putting semicolons after each step.

5!=120
(Not missing brackets)

"I don't need math!
I'll just make videogames when I grow up!"
[Myself as a child]

Math problems ...

Math: the imaginary unit is i.
Electrical engineering: no, it's j.
C hacker: hands off my loop variables!

Me:i want a mac book
Mum:Its pronounced as "math book"
me:😧

Math Prof.: What is the result of √-4 ?
Noobs: 2i
Geek: An Indian bread called "NaN" 😎

math and gaming

7 = 5😅

C language & math formulation, you are bound to miss one of these. 😓

Day 1:
I installed an alarm app that doesn't turn off until you solve some math problem.
Next morning:
* alarm turns on
* solve the math problem
* get back to sleep

Conclusion:
most dangerous thing in the morning is the " let me close my eyes for one second"

That moment when you realise f(x)=x²
that you did in 4th grade and now
Function(x){
return x*x;
}
....😯😮😲😱😵...
You realise that Everyone has been doing programming all their life....

Basic math class for devvys

Lemme prove that 2 = 1

a = b
a^2 = ab
a^2 - b^2 = ab - b^2
(a + b) (a - b) = b (a - b)
a + b = b
b + b = b
2b = b
2 = 1

Find a place where I got wrong...
And if you fall by this, you should go to preschool again

This reminds me of my discreet math books.....

I read somewhere that 3 out of every 2 developers suck at math.

Been telling relatives that I'm an applied math major to get out of helping them with their tech issues.

Microsoft can't math.

10 + 10 = 4

One of the math teachers at school wrote this on the whiteboard.
Merry X-mas everyone!

A friend just asked if I could get him an internship at the place I work. He has no computer/programming background at all but how hard could developing be.
So I informed him my CS degree required at least 7 math courses lowest being calculus.
You need to know math!?!?
Yeah we're the one who writes the programs that actually does the math for everyone else

Fuck it. Fuck my fear of math. Fuck it. Tomorrow I'm gonna stick my dick in OpenGL again.

Mandatory math classes for cs degree 😢

Is math related to health?

JavaScript math is hard.

At a job interview.

Them: Can you please write a function that calculates fibonacci numbers on the whiteboard please.

Me:

fib=_=>($=>$.round(($.pow((1+$.sqrt(5))/2,_)-$.pow(-2/(1+$.sqrt(5)),_))/$.sqrt(5)))(Math)

Math nerds do it better!

oh no! my greatest nemesis!

Q: What did the mermaid wear to math class?

A: An algae-bra.

Math pre-finals tomorrow.

I am scared as fuck.

Wish me luck, I need it.

I've got one thing to say:

Fuck. Math.

That's all.

Hardcore loli porn.

Just kiddig. Video games and math study. I believe that the most elegant solutions come in the form of math and the challenge they impose as well as the satisfaction of getting the correct result (or the estimate for it) are comparable to running a succesfull application.

Math everywhere.....😏😩

math be like:

"Addition (often signified by the plus symbol "+") is one of the four basic operations of arithmetic; the others are subtraction, multiplication and division. The addition of two whole numbers is the total amount of those values combined. For example, in the adjacent picture, there is a combination of three apples and two apples together, making a total of five apples. This observation is equivalent to the mathematical expression "3 + 2 = 5" i.e., "3 add 2 is equal to 5".

Besides counting items, addition can also be defined on other types of numbers, such as integers, real numbers and complex numbers. This is part of arithmetic, a branch of mathematics. In algebra, another area of mathematics, addition can be performed on abstract objects such as vectors and matrices.

Addition has several important properties. It is commutative, meaning that order does not matter, and it is associative, meaning that when one adds more than two numbers, the order in which addition is performed does not matter (see Summation). Repeated addition of 1 is the same as counting; addition of 0 does not change a number. Addition also obeys predictable rules concerning related operations such as subtraction and multiplication.

Performing addition is one of the simplest numerical tasks. Addition of very small numbers is accessible to toddlers; the most basic task, 1 + 1, can be performed by infants as young as five months and even some members of other animal species. In primary education, students are taught to add numbers in the decimal system, starting with single digits and progressively tackling more difficult problems. Mechanical aids range from the ancient abacus to the modern computer, where research on the most efficient implementations of addition continues to this day."

And you think like .. easy, but then you turn the page:

Given the pace of technology, I propose we leave math to the machines and play outside

I’ve realized that programming made me so much better at math!

Although I’ve caught myself writing “int x” once in the notebook.

Can you hate complex math and still be a backend developer? 🤔

credits to fb:@entertainmentxlab

A moment of silence for all those poor CS students who have to do hours of math exercises...

Mother fucking SQL, fuck mathematicians, fuck every thing!

So let's supose we'd only need the first char of a string. Every, and I mean fucking every (php, java, javascript, ruby, python, haskell) fucking language, uses something like `substring(input, 0, 1)` as it knows the input is nothing more than a fucking array of chars, otherwise known as motherfucking String. Logically the offset for the first char is 0.

Enter SQL, there you need to put `SUBSTRING(input, 1, 1)` because fuck every one! Fucking math guys who developed relational algebra on which (most) databases are based on (I love you for it, but come on you fuckers!), Decided that the first character should be at position 1...

Fuckers

The state of informatics education is just saddening.
You study "Software Development" and then you get to do exams asking you to do some basic linux commands - with full internet access on a computer. People are allowed to fail this and study on. On the other hand you have to do real coding with pen and paper, have to calculate from hex to bin to dec and stuff and most Importantly - know about all kinds of math stuff completely unreleated to cs.
Graph Theory absolutely makes sense in my eyes, but not if it's plain fucken math without even mentioning computers or applications of it. But if you fail that everyone looks weird at you.

I know about coding. I got A's and B's in all the coding exams _without even doing much for them_ but then fail all the fucken math exams. Makes no sense. FML.

Everyday, I am amazed at developers like those here on devRant. I look up at you in awe and admiration, always thinking about how awesome your life probably is, even though you rant about it sometimes. I want to be like many of you in the future.
Thank you for improving our lives with whatever​ you are doing. I feel like this doesn't get said enough.

Meanwhile, University sucks (failed exams), but I am expected to graduate with good grades. Sigh. I also feel like I'm not learning enough of those things that I need to become a good dev and rather overly complicated math which I'll never need in my later life.

Floating point math abridged

Well, I just learned how much of a pain it is to learn the math for learning neural networks. I really should have paid more attention in high school.

I will learn, the hard way I guess...

Honestly, i hate math or actually i hate that i suck at it. I graduated CS and if u put a math problem any bit more advanced than basic linear equations i will turn red. I wish i was good at it. I think if i was, id be able to do much more cool shit because combining math and the ability to control a computer basically makes you a demi god.

If i had some free time i’d love to go over the basics on khan academy or something. But free time doesnt come by a lot coz we’re too busy trying to make money and id rather just rest and chill when it does.

Tho if a cute girl offered to tutor me in that free time i’d definitely say yes 🧐

from math import randint
lines = code.lines()
bugs = lines + randint(1, 10)

Math.
The thing i am fucking bad in.
Even basic math shit is hell for me.

Me in school: Math? When do I need know those details? I can look them up and just code it.

Me in high school: Computer science is way too math-y. I want to code!

Me coding php: Just make it work.

Me coding typescript: Just make it work.

Me coding scala: Just make it ... what ... how do I make it work!?!

Me asking stackoverflow: How do I do X in scala some functional programming stuff in mind in order to keep immutability.

Somebody way smarter than I: "In scalaz, a function A => A is called an endomorphism and is a Monoid whose associative binary operation is function composition and whose identity is the identity function"

Me now: Fuck my old arrogant self.

Take more math than you need. Seriously. Computers are made of math. Nobody ever got an award for best looking web page. People do get awards for actual science.

Skills required for ML :
Math skills:
|====================|
Programming skills :
|===|

Skills required for ML with GPU:
Math skills:
|====================|
Programming skills :
|====================|

/*contemplating career choice*/
: /

Math is sexist because everything two-dimensional is presented in xy-coordinates

Discrete mathematics teacher said "13*37" in the middle of an Euclidean algorithm.
Half the class giggled and the other half just sighed.

These students are your future co-workers.

Status update: Almost two months ago I struggled alot with even basic math.
Now I've gotten way better in not just basic stuff, but also college level of math.

That's it. Bye.

math is a programming language in disguise 🌚

Is it just me or does this math not fucking work out??

I feel like I've ranted this before. many times. but here we go again because Australia.

why do people think you can just ban math? like really?! that's what crypto laws do. they require companies to use shitty math. and what prevents me from using the good math? nothing! oh I mean... I won't use it? scouts honor.

you can't ban math.
literally billions of internet users don't fall in your jurisdiction.
no single jurisdiction can cover more than a subset of the internet.
I will use whatever maths I damn well please.
fuck off. please stop making us less safe.
/discussion

After all these years in IT a coke bottle made me realize I fkin suck in math

oh, wait....

*Didnt understand anything mathematic back in grade and highschool

*Can understand math in code no problem.

Remember the post about bruce's constant?(4.5099806905005)

Well apparently theres a convergent series for it found all the way back in 2015.

Apparently its an actual thing. Which connects e to the square root of this series.

And it converges on (bruce-1)**0.5.
I confirmed it myself.

The two people who found the series that converges are N. J. A. Sloane and Hiroaki Yamanouchi

Thank you Sloane and Hiroaki!

The actual formula is a series of embedded square roots with the repeating numbers 1,4,2,8,5,7
like so...
sqrt(1+sqrt(4+sqrt(2+sqrt(8+sqrt...

What this means is you can find e using this series.

All you do is run the series, raise by a power of 2, add 1, calculate J and K like so

J = log(2, 1.333333333333333) / log(2, 2)
K = log(2, 1.333333333333333) / log(2, 3)

then calculate (J+K)-(bruce-1)
and out pops our buddy e:
2.7182818284591317

I guess I bullshitted myself for so long, that I didn't believe people like scor when they said they legit witnessed by math skills grow.

Or maybe a blind squirrel occasionally DOES find a nut.

Pretty cool find either way.

Wow, I still remember some math after decades. Today, I needed some parameter calculation in an interval with smooth transition at both ends (i.e. continuously differentiable). So I used a 3rd degree polynomial where the values and derivations gave a 4x4 linear equation system. I lazily hacked that into WolframAlpha, and it works nicely.

Apparently, floating point math is broken.

=SUM((2.1 - 2.0) - 0.1)

In PHP and Haskell this also happens

Why was the math book sad? Because it had too many problems.

A new mathematical constant was discovered recently: Bruce's constant

I took some code from the paper and adapted it in python.

def bruce(n):
J = log(n, 1.333333333333333) / log(n, 2)
K = log(n, 1.333333333333333) / log(n, 3)
return ((J+K)-e)+1

gives e everytime for ((J+K)-bruce)+1, regardless of the value of n.

bruce can always be aproximated with the decimal 4.5, telling you how close n can be used to aproximate e (usually to two digits).

Bruce's constant is equal to 4.5099806905005

It is named after that famous mathematician, bruce lee.

You'll start with four limbs and end up with two in a wheelchair!

I've got a teacher (math) in the university that let us use our phones as a calculator in the exam but without sim card and of course no wifi. I've spent a few hours programming a very ugly CLI app which let me calc and show me the steps of every type of exercise.
Another probe that programming can save your ass.
The exam wasn't difficult but basically they tell you to solve a few problems applying different methods, that hasn't advantage from others.

Got a mathematics library I develop and maintain. Someone filed a feature request ticket for matrices of matrices. As in, each value of the primary matrix is another matrix. Not understanding why anyone would need such a convoluted concept, I asked for clarification.

Response: "This piece of shit library isn't feature complete without it, now stop being a lazy fag in your mother's basement and actually do something"

Lololololol. Sure thing. Let me go waste two or more weeks of my life developing something i've never seen used in math, without any justification beyond "feature".

Having a math test tomorrow, wish me luck bois!

Upon reflection, I think that the amount of math I learned in school pales in comparison to the amount I learned about LaTeX. I could pretty reliably recreate the textbook rendition of the problem. Maybe it's just me but just knowing the solution felt too abstract. I want a solid looking execution of it.

I'm graduating today so I don't know how relatable this is for everyone else. I'm just reflecting.

you know what time it is. its "wisecrack-tries-to-do-math-again" time!

Think in math on paper before start programming

. <- math I know

Today, i finally started to develop in Unity. Now i know, i know nothing about math

When math you needed to know comes back to bite you :/

I have this math teacher and, wow, is she good at math. And, wow, should she never enter another field in her life. Today she asked us if anyone does code. The answer is yes, but I refuse to answer something that uses code as a verb.

Amazing math by people at Dell

1. Building stuff is awesome!
2. It's creative work that actually makes cash
3. I like writing algos and math

Currently writing code to write math.

What I'm saying is, I make nerds look good.

Those of you who like "The Imitation Game", you probably want to check out "Hidden Figures" (2016). It's on Netflix now.

About a team of female African-American mathematicians who wanted to "break the glass ceiling" in NASA.
- Dorothy : conquered the (recently acquired) IBM frameworks using Fortran and taught her team to program it
- Mary : appealed to court to be allowed to study in a all-white school to get her qualification to be an aerospace engineer
- Katherine : her skills in analytical geometry enabled her to be the first female African-American in the Space Task Group in calculating the momentous capsule launch into orbit

My lazy ass just can't fathom how someone who deals with so much math and pressure can still smile to their family after work. My grumpiness nature will surely turn me into a monster.

And now I know what "human computers" means.

A funny story I just remember while my code is compiling :

Back in high school, in Math, we were taught how algorithm works, and we made some exercises with practical examples.

I didn't know anything about it back then, so was curious. Was pretty fun, but one day, my teacher said that a IF is a loop. I said "no, this is a test" but she keeps saying that it was a loop, ignoring me (I dunno if she actually heard me) and no one actually noticed it as she repeated it several times (while I was saying that it's not). I just gave up trying to say it's wrong.

CS major is fun until the devil called math arrives

Still on the primenumbers bender.
Had this idea that if there were subtle correlations between a sufficiently large set of identities and the digits of a prime number, the best way to find it would be to automate the search.

And thats just what I did.

I started with trace matrices.
I actually didn't expect much of it. I was hoping I'd at least get lucky with a few chance coincidences.

My first tests failed miserably. Eight percent here, 10% there. "I might as well just pick a number out of a hat!" I thought.

I scaled it way back and asked if it was possible to predict *just* the first digit of either of the prime factors.

That also failed. Prediction rates were low still. Like 0.08-0.15.

So I automated *that*.

After a couple days of on-and-off again semi-automated searching I stumbled on it.

[1144, 827, 326, 1184, -1, -1, -1, -1]

That little sequence is a series of identities representing different values derived from a randomly generated product.

Each slots into a trace matrice. The results of which predict the first digit of one of our factors, with a 83.2% accuracy even after 10k runs, and rising higher with the number of trials.

It's not much, but I was kind of proud of it.

I'm pushing for finding 90%+ now.

Some improvements include using a different sort of operation to generate results. Or logging all results and finding the digit within each result thats *most* likely to predict our targets, across all results. (right now I just take the digit in the ones column, which works but is an arbitrary decision on my part).

Theres also the fact that it's trivial to correctly guess the digit 25% of the time, simply by guessing 1, 3, 7, or 9, because all primes, except for 2, end in one of these four.

I have also yet to find a trace with a specific bias for predicting either the smaller of two unique factors *or* the larger. But I haven't really looked for one either.

I still need to write a generate that takes specific traces, and lets me mutate some of the values, to push them towards certain 'fitness' levels.
This would be useful not just for very high predictions, but to find traces with very *low* predictions.

Why? Because it would actually allow for the *elimination* of possible digits, much like sudoku, from a given place value in a predicted factor.

I don't know if any of this will even end up working past the first digit. But splitting the odds, between the two unique factors of a prime product, and getting 40+% chance of guessing correctly, isn't too bad I think for a total amateur.

Far cry from a couple years ago claiming I broke prime factorization. People still haven't forgiven me for that, lol.

I hate OpenGL. I want to stab it in the face. I am not a math programmer.

We'll build an mathematics-6th-grader-calculation-game in IT-class. ("Math-Tetris")

In Java.

I hate Java.

Sit down to do a math lab in Maple on university computers. Struggle for a while with shitty software. Click on a help link provided by Maple for an error I was getting.

BSOD outta nowhere.

Hadn't saved my work. And Maple was developed by the best university in Canada. I hope they all catch something rare and incurable and die.

I just found something cool on accident.

Assuming you start the fibonacci sequence on 2, you can find any of the fibonacci numbers for a given index with a simple trick:

Let Phi = 1.618
Let your index n = n+1

Floor(phi**(n+1+0.328))+1 = the fibonacci number at index n in the sequence.

This probably breaks down past some point but its nifty.

Just finished up some math homework

One of the problems involved finding the side lengths of a triangle

Spend a good 20 minutes fucking around with the law of sines and the law of cosines before I realized it was a right triangle, and so I could use the Pythagorean theorem

I'm an idiot

I'm currently volunteering as a student assistant at my school, and today I've gotten the same question 20x. What question do you ask: "Why doesn't ^ return the power of the 2 numbers?"

It turns out that last week they've had a Math class from a new teacher (no programming experience) who said that if you want the power of 2 numbers you have to use the ^ operator...

If you don't know how to program, please don't teach it!

Can a person succeed in computer science if he is weak in math?

should i know math for learn ai?

My Precalculus teacher has such overstrict rules on showing work.

1. On tests, degree signs must be shown in all work. This wouldn't be outrageous except that if the answer is right but a single degree sign is missing in the mandated shown work, the entire question is wrong even with a correct final answer because the "answer doesn't match up with the work".

2. We must show work in the exact form mandated from on class. If even a single step of work is missing or wrong on even one say homework problem, no credit even if the entire rest of the sheet is correct and complete.

3. Never applied to me, but if a homework problem cannot be solved by a student, they must write a sentence describing how far they got and what wasn't doable, or no credit on the entire homework. Did I mention it is checked daily and is 2 unweighted points with 50-100 point tests?

4. On graphing calculator problems, one had to draw a rectangle representing the calculator screen, even for solving systems of equations without explicit drawing graphs as part of the problem, because otherwise, she had "no proof that a calculator was used". It isn't that hard to fake, and it was quite stupid.

5. Reference triangles were required even when completely unnecessary or the answers were assumed copied, even if a better method was shown in work.

And much, much more!

Does anyone else think discrete math is super satisfying? I love it so much more than algebra or Calc

My dad celebrated his birthday, I've decided to play with the decoration on the table

Chances are configurable in the project. Custemer didn't understand why something ALWAYS happened when he set it to 100%

Is math necessary for programming ?

Math Problem of The Day

For starters this is my first post, found devrant the other day you're all hilarious.

I hate math, I hate proofs. I'm in a class "Analysis of Algorithms" and I have understood and do understand the importance of optimizing algorithms and data structures and I understand the algorithms and data structures themselves. That being said, I'm fucking sick of math and proofs and all this bullshit that is probably pretty important but ugggghh, I guess I just have to push through, but writing this out helped.

yeah..

customer: I have a problem.
Smart Cell: here's a math problem, just divide it 3 times by 1024

wait a minute.....

fuck you too math

Riddle:

Alice and bob want to communicate a secret message, lets say it is an integer.
We will call this msg0.
You are Chuck, an interloper trying to spy on them and decode the message.

For keys, alice chooses a random integer w, another for x, and another for y. she also calculates a fourth variable, x+y = z
Bob follows the same procedure.

Suppose the numbers are too large to bruteforce.

Their exchange looks like this.
At step 1, alice calculates the following:

msg1 = alice.z+alice.w+msg0
she sends this message over the internet to bob.
the value of msg1 is 20838

then for our second step of the process, bob calculates msg2 = bob.z+bob.w+msg1
msg2 equals 32521
he then sends msg2 to alice, and again, you intercept and observe.

at step three, alice recieves bob's message, and calculates the following: msg3 = msg2-(alice.x+alice.w+msg0)
msg3 equals 19249. Alice sends this to bob.

bob calculates msg4 = msg3-(bob.x+bob.w)
msg4 equals 11000.
he sends msg4 to alice

at this stage, alice calculates ms5.
msg5 = (msg4-(alice.y)+msg0.
alice sends this to bob.

bob recieves this final message and calculates
the sixth and final message, which is the original hidden msg0 alice wanted to send:
msg6 = msg5-bob.y

What is the secret message?
I'll give anyone who solves it without bruteforcing, a free cookie.

Weeeell…

I have been in a team where every week they had this long and complex task of refactoring everything and changing lots of assets (~2 days of work every 2 weeks) cause the senior tards refused to use a script for it. Told them to use the goddamn backend or a script… the answer? “But that would take at least two days of work! Maybe even three! (As a one time job)” Math you ducking ducks! The second time you use it you are in a time profit!

I love technology. I love programming and developing software. I love self-learning new things.

But I REALLY REALLY REALLY hate Math. And suck at it too.

I want to study comp-sci at the university but I'm scared of the math.

Any tips?

Having a CS exam right now, wish me luck!

Finally, non-math shit.

Faster square roots?

Did you know if you multiply your
product by pi, and then use that as
the area of a circle while solving for
the radius, the result will be an
approximation of the square root
of your product.

Example:

let p (the product) = 492181
then √p = 701.5561274766261

492181*pi = 1,546,232~
(leaving off the fraction for
the sake of brevity)

area = 1,546,232

then the radius of the 'circle' would be 701.56

I wonder if anyone has stumbled on this before?

That moment when you just quit your successful paying job just to have more time to study and try to pass the fucking piece of trash math exam.

Fuck my asshole, fuck my life and fuck that motherfucking college degree. If I don't pass, I will eventually kill my self or quit college.

Jeez, I wonder what was in my head when I enrolled in college, oh wait.. Parents, society brainwashed me to think I need top tier education to be a successful computer programmer engineer.

Fuck you society, fuck my brain, fuck everything.

I think I've reached the point where I've been programming for so long that I have off by one errors doing normal math by hand. Nothing more humbling than getting beat out to a bunch of simple math problems to a grade schooler.

Math is defined as the following:

Giving you answers to questions you never had.

I think I did it. I did the thing I set out to do.

let p = a semiprime of simple factors ab.
let f equal the product of b and i=2...a inclusive, where i is all natural numbers from 2 to a.
let s equal some set of prime factors that are b-smooth up to and including some factor n, with no gaps in the set.
m is a the largest primorial such that f%m == 0, where
the factors of s form the base of a series of powers as part of a product x
1. where (x*p) = f
2. and (x*p)%f == a

if statement 2 is untrue, there still exists an algorithm that
3. trivially derives the exponents of s for f, where the sum of those exponents are less than a.
4. trivially generates f from p without knowing a and b.

For those who have followed what I've been trying to do for so long, and understand the math,
then you know this appears to be it.

I'm just writing and finishing the scripts for it now.

Thank god. It's just in time. Maybe we can prevent the nuclear apocalypse with the crash this will cause if it works.

Reminder: never do anything math related in JavaScript.

Develop my first mobile app with a restful backend for consumer usage

Learn more about cloud architecture/computing

Finish learning calculus

Learn linear algebra, discrete math, statistics and probability

Maybe start ML this year depending on math progress and time

in math someone said that if
x = x / 0 then x = undefined

he must be using a js calculator

Found a clever little algorithm for computing the product of all primes between n-m without recomputing them.

We'll start with the product of all primes up to some n.

so [2, 2*3, 2*3*5, 2*3*5*,7..] etc

prods = []
i = 0
total = 1
while i < 100:
....total = total*primes[i]
....prods.append(total)
....i = i + 1

Terrible variable names, can't be arsed at the moment.
The result is a list with the values

2, 6, 30, 210, 2310, 30030, etc.

Now assume you have two factors,with indexes i, and j, where j>i

You can calculate the gap between the two corresponding primes easily.
A gap is defined at the product of all primes that fall between the prime indexes i and j.

To calculate the gap between any two primes, merely look up their index, and then do..
prods[j-1]/prods[i]

That is the product of all primes between the J'th prime and the I'th prime

To get the product of all primes *under* i, you can simply look it up like so:

prods[i-1]

Incidentally, finding a number n that is equivalent to (prods[j+i]/prods[j-i]) for any *possible* value of j and i (regardless of whether you precomputed n from the list generator for prods, or simply iterated n=n+1 fashion), is equivalent to finding an algorithm for generating all prime numbers under n.

Hypothetically you could pick a number N out of a hat, thats a thousand digits long, and it happens to be the product of all primes underneath it.

You could then start generating primes by doing
i = 3
while i < N:
....if (N/k)%1 == 0:
........factors.append(N/k)
....i=i+1

The only caveat is that there should be more false solutions as real ones. In otherwords theres no telling if you found a solution N corresponding to some value of (prods[j+i]/prods[j-i]) without testing the primality of *all* values of k under N.

I see a lot of talk about complex numbers, and yet
for all they are worth, I have not once been
able to find an explaination on how to calculate
them by hand, namely the real component.
For example
(-5)**0.5
(1.3691967456605067e-16+2.23606797749979j)

2.23606 is obviously just the square root of 5, but where the hell did 1.369 come from?

Apparently no one fucking knows, and no site I've found gives a simple explanation for someone new to math in general.

"use a calculator", "hit a button",

How about no.

Working with surds recently, and found some cool new identities that I don't think were known before now.

if n = x*y, and z = n.sqrt(), assuming n is known but x and y are not..

q = (surd(n, (1/(1/((n+z)-1))))*(n**2))
r = (surd(n, (surd(n, x)-surd(n, y)))*surd(n, n))

s = abs(surd(abs((surd(n, q)-q)), n)/(surd(n, q)-q))
t = (abs(surd(abs((surd(n, q)-q)), n)/(surd(n, q)-q)) - abs(surd(n, abs(surd(n, q)+r)))+1)

(surd(n, (1/(1/((n+z)-1))))*(n**2)) ~=
(surd(n, (surd(n, x)-surd(n, y)))*surd(n, n))

for every n I checked.

likewise.

s/t == r.sqrt() / q.sqrt()

and

(surd(n, q) - surd(s, q)) ==
(surd(n, t) - surd(s, t))

Even without knowing x, y, r, or t.

Not sure if its useful, but its cool.

surd() is just..

surd(j, k ) = return (j+k.sqrt())*(j-k.sqrt())

and d() is just the python decimal module for ease of use.

1 notification.

Oh, devrant... It's not how math works <smh.gif>

While I was exploring multiplication tables I stumbled on something cool.
Take any power of 2 on the multiplication chart.
Now look at the number in the bottom left adjacent box.
The difference of these two numbers will always be a Mersenne number.
Go ahead. Starting on the 2's column of a multiplication table, look in the bottom left of each power of 2 and get the difference.

2-2 = 0
4-3= 1
8-5 = 3
16-9=7
32-17=15

etc.

While the online journal of integer sequences lists a lot of forumlas, I just wrote what came to mind (I'm sure its already known):
((2**i)-(((2**i)/2)+1))

The interesting thing about this is it generates not only the Mersenne numbers, but if you run i *backwards* it generates *additional* numbers.
So its a superset of mersenne numbers.

at i = 0 we get -0.5
i=-1 -> -0.75
i=-2 -> -0.875
i=-3 -> -0.9375
i=-4 -> -0.96875

And while this sequence is *not* mersenne numbers, mersenne numbers *are* in this set.

Just a curious discovery is all.

In math class: Using y = mx + b to calculate the slope of how downhill my life is going 😒

I should have studied for my math exam, but now I can program a terminal calculator in FORTRAN77
//masterofprocrastonation

The power of Linux in math

More masturbation with numbers.

If you take some product p,
and do

√p**(1/p)

and it's factors

a**(1/p)

and

b**(1/p)

you might find something interesting.

Take for example

a=21977
b=43331
p=a*b=952285387

(√p)**(1/p) = 1.0000000108551363

a**(1/p) = 1.0000000104986928
b**(1/p) = 1.0000000112115799

More often then not, a, b, or both, will share one or two of the most significant digits in the mantissa, as the root of p.

It doesn't always work, but it seems to be true more often than you might expect.

This is probably obvious in hindsight but I still think it's cool.

In some instances if you then do, say
sqrt(log(p, 1.000000010)), it comes pretty close to the original factors, but thats really hit or miss.

A couple times a week my girlfriend tells me that she leaves work. She travels with a motorised vehicle for about 45 minutes. I am responsible of cooking food on those days. The food preparation takes around 7 minutes of cutting vegetables and the cooking takes around 20 minutes. the current time of reading the message is 17:17. She had send the message at 17:08. At what time should I start making food in order to be finished at the time she gets home?

I start to relate more and more to school math questions...

Maybe I should make an app for this or website to calculate automatically.

Today I finally experienced the power of something I learned in university: propositional and predicate logic.

Many developers I know think that such education is useless. Well, today I have proven that it is very useful. On a day to day basis, working on banking software, complexity in purely logic is very low. However, we have a screen that must show or hide elements based on some input values and conditions associated with certain elements. How hard can that be, right? Well, there are many variables to take into account and as such it's absolutely not trivial.

This screen didn't work properly and maintaining the code is hard as there is a lot of logic to show/hide, enable/disable things and so on. After quite some time and attempts by fellow developers, I decided to refactor the whole thing. I'm responsible for the quality of the software and it was quite degrading, so I had to do something.

In order to get things working properly, I defined collections of constants (ui elements) and predicates. Then, I defined for which element what predicates must be true, in order to hide/show, disable/enable etc. I then translated these predicates into code. And guess what? It works! Of course it works. It's logic. But I'm very pleased I finally could actually use some of all the math I studied!

malaise, the haiku:

leaving my tech job,
becoming a math teacher
almost sounds quite nice.

My favorite part about parrot os so far :D

"I don't like math"

Doing some math with Javascript is like doing math with my six year old son.

Husband looking into online schools for CS. Anything data science related. He loves math (and is freaking good at it) and teaches himself R for fun.

I put 0 thought into my own schools (terrible, I know, but not likely to change any time soon). Any suggestions for good online data Science programs, with a math minor potentially?

It's for his bachelor's.

Math is hard….

Medium-sized math test in 30 minutes.

Wish me luck!

(I am going to update, so stay tuned)

Programmers: x=x+1

Mathematicians: x=x+1

*confused silence*

So.. name one fucken case where your database is not a computer backed thing.

Just asking because.. why the fuck? I don't think your database server supports input of fucking math symbols? JUST USE HUMAN LANGUAGE, AS YOU HAVE TO DO ANYWAY!

It's stupid how everything needs to be expressed mathematically ffs. Not that it's hard to understand - it's just more complex than of a very simple wording.

I just solved a math issue I came up with for no reason !

Darn... No more telling it, it's bad at math and to apologize and think about what's its done.

I'm fairly new (less than a year) to programming and I'm just wondering what everyone's thoughts are about this.

Is taking college math courses necessary to be a good programmer?

I am learning online and I'm worried I won't be a great programmer without all the math. The last course I took was Trig :/

Also add any suggestions you have. Thanks all!

Student: I f*cking hate this calculus I am not even good in math.
Professor: Then why did you choose Computer Engineering it needs a lot of math.
Student: Because I love computer.
Professor: 'FacePalm'

can we just get rid of floating points? or at least make it quite clear that they are almost certainly not to be used.

yes, they have some interesting properties that make them good for special tasks like raytracing and very special forms of math. but for most stuff, storing as much smaller increments and dividing at the end (ie. don't store money as 23.45. store as 2,345. the math is the same. implement display logic when showing it.) works for almost all tasks.

floating point math is broken! and most people who really, truely actually need it can explain why, which bits do what, and how to avoid rounding errors or why they are not significant to their task.

or better yet can we design a standard complex number system to handle repeating divisions and then it won't be an issue?

footnote: (I may not be perfectly accurate here. please correct if you know more)

much like 1/3 (0.3333333...) in base 10 repeats forever, that happens with 0.1 in base 2 because of how floats store things.
this, among other reasons, is why 0.1+0.2 returns 0.30000004

Question - is this meaningful or is this retarded?

if

2*3 = 6
2*2 = 4
2*1 = 2
2*0 = 0
2*-1 = -2

then why doesnt this work?

6/3 = 2
6/2 = 3
6/1 = 6
6/0 = 0
6/-1 = -6

if n/0 is forbidden and 1/n returns the inverse of n, why shouldn't zero be its own inverse?

If we're talking "0" as in an infinitely precise definition of zero, then 1/n (where n is arbitrarily close to 0), then the result is an arbitrarily large answer, close to infinite, because any floating point number beneath zero (like an infinitely precise approximation of zero) when inverted, produces a number equal to or greater than 1.

If the multiplicative identity, 1, covers the entire set of integers, then why shouldn't division by zero be the inverse of the multiplicative identity, excluding the entire set? It ONLY returns 0, while anything n*1 ONLY returns n.
This puts even the multiplicative identity in the set covered by its inverse.

Ergo, division by zero produces either 0 or infinity. When theres an infinity in an formula, it sometimes indicates theres been
some misunderstanding or the system isn't fully understood. The simpler approach here would be to say therefore the answer is
not infinity, but zero. Now 'simpler' doesn't always mean "correct", only more elegant.

But if we represent the result of a division as BOTH an integer and mantissa
component, e.x

1.234567 or 0.1234567,

i.e. a float, we can say the integer component is the quotient, and the mantissa
is the remainder.

Logically it makes sense then that division by zero is equivalent to taking the numerator, and leaving it "undistributed".
I.e. shunting it to the remainder, and leaving the quotient as zero.

If we treat this as equivalent of an inversion, we can effectively represent the quotient from denominators of n/0 as 1/n

Meaning even 1/0 has a representation, it just happens to be 0.000...

Therefore

(n * (n/0)) = 1

the multiplicative identity

because

(n* (n/0)) == (n * ( 1/n ))

People who math. Is this a yea or nay in your book?

Knowledge and hardwork vs. attitude.. Simple math.

I already forgot what are the different sorting algorithms I learned last week. I already forgot sin, cos, tan, log, and some Math concepts in school. How not to forget these things easily? I could recall them once I see a sample and a brief explanation.

* Math exists *
Javascript: Imma about to destroy this man's whole career.

If you want a really obtuse method for inverting numbers in python, here you go:

z0 = Decimal('78.56341431805592768684300246940000494686645802145994376216014333')

z1 = Decimal('1766612.615660056866253324637112675800498420645531491441947721134')

z2 = Decimal('1766891.018224248707391295083927186110075710886547799081463050088')

z3 = Decimal('15658548.51274600264911287951105338985790517559073271799766738859')

z4 = Decimal('1230189034.426242656418217548674280136397763003160663651728899428')

z5 = Decimal('1.000157591178577552497828947885508869785153918881552213564806501')

((((z0/(z1/(z2/(n)))))*(z3))/z4)/z5

From what I can see, it works for any value of n.

I have no clue why it works.

Also have a function to generate the z values for any n input.

Shitpost studios.

Bringing you QUALITY math posts since 2019!

"we shitpost because we care."

When I was in seventh grade, I learned to solve quadratic equations and how to convert from standard form to vertex form

Today, when I had to convert a quadratic equation, I completely blanked on how to do it

I can’t remember how to do math seventh graders know

Fml

!rant

I posted a rant a few days ago, saying Math sucks and I fucking hate it.

Don't you love it though, when everything falls into place nicely when it's really just mathematical laws. It's beautiful

When My ISP think I don't know math

I have two math final exams on the same day, and one is scheduled 30 minutes after the first one 🙁🙁

I fucking hate math, and this shit sure isn't helping me.

Web devs suck at math !
Thank you for reading.

When you're doing a math problem at school and you can't solve problems with loops and if statements

At math lessons I was like: "WTF is this shit, I don´t need that." Well I figured out that coding is not "copy&paste" from SO. :)

Colleague: The user said this [Total line] is not the average she expected.
Me: Okay? But she knows that averages are weighted?
Colleague: I'm gonna call her.

... 30 minutes fast forward

Colleague: Okay she wants an average, but she wants us to divide it by something else.
Me: Okay? But she knows an average is the sum of one thing divided by the sum of another thing and not just anything?
Colleague: Yeah, she said she wants it to be kinda this in relation to that.
Me: Okay, so rather some percentage value?
Colleague: To be honest, she just wanted to reproduce this old Excel formula.

God has left this planet ... and I admire my colleague for not completely freaking out in the face of the user.

I've been away a while, mostly working 60-70 hour weeks.

Found a managers job and the illusion of low-level stability.

Also been exploring elliptic curve cryptography and other fun stuff, like this fun equation...

i = log(n, 2**0.5)
base = (((int((n/(n*(1-(n/((((abs(int(n+(n/(1/((n/(n-i))+(i+1)))))+i)-(i*2))/1))/1/i)))))*i)-i)+i))

...as it relates to A143975 a(n) = floor(n*(n+3)/3)

Most semiprimes n=pq, where p<q, appear to have values k in the sequence, where k is such that n+m mod k equals either p||q or a multiple thereof.

Tested successfully up to 49 bits and counting. Mostly haven't gone further because of work.

Theres a little more math involved, and I've (probably incorrectly) explained the last bit but the gist is the factorization doesn't turn up anything, *however* trial lookups on the sequence and then finding a related mod yields k instead, which can be used to trivially find p and q.

It has some relations to calculating on an elliptic curve but thats mostly over my head, and would probably bore people to sleep.

Everytime I consult with senior devs on how to transition from my sysadmin job and get my first dev job they always tell me to get a CS degree.

Look. I will get that fucking degree eventually. But I want to build up dev skills and learn from a company before killing myself over math crap for 3 years. But it's like a vicious cycle. Every junior position I apply to rejects me because I have no degree.

I'm fucking frustrated and depressed.
What should I do? I want to break from the IT meme and get a dev job.

In the meantime I'm doing small projects and freelancing in my very little free time. But I feel I'll never truly be a developer until I work as one professionally.

If I have four unknown variables, x, y, j, and k, but know the values of x*j, y/k, and k/j, and x*j == y/k

How do I go about getting the values of the individual unknown variables?

What paradoxes taught me.

Perhaps each time a paradox is encountered in mathematics, there is a useful distinction or mathematical tool hiding in plain sight, one that hasn't be discovered or utilized. For cursory evidence I give you: division by zero, the speed of an arrow at any point in flight, and calculus.

Maybe this isn't true for some paradoxes, or even most, but as time goes on I suspect people will discover it is more true than they might have thought.

Undefined behavior and results aren't nonsense: They look to me like golden seams to be explored for possible utility when approached from uncommon angles with uncommon problems.

My favourite math operator? Distraction!

When we subtract some number m from another number n, we are essentially creating a relationship between n and m such that whatever the difference is, can be treated as a 'local identity' (relative value of '1') for n, and the base then becomes '(base n/(n-m))%1' (the floating point component).

for example, take any number, say 512
697/(697-512)
3.7675675675675677

here, 697 is a partial multiple of our new value of '1' whose actual value is the difference (697-512) 185 in base 10. proper multiples on this example number line, based on natural numbers, would be
185*1,
185*2
185*3, etc

The translation factor between these number lines becomes

0.7675675675675677

multiplying any base 10 number by this, puts it on the 1:185 integer line.

Once on a number line other than 1:10, you must multiply by the multiplicative identity of the new number line (185 in the case of 1:185), to get integers on the 1:10 integer line back out.

185*0.7675675675675677 for example gives us

185*0.7675675675675677
142.000000000000

This value, pulled from our example, would be 'zero' on the line.

185 becomes the 'multiplicative' identity of the 1:185 line. And 142 becomes the additive identity.

Incidentally the proof of this is trivial to see just by example. if 185 is the multiplicative identity of 697-512, and and 142 is the additive identity of number line 1:185

then any number '1', or k=some integer, (185*(k+0.7675675675675677))%185
should equal 142.

because on the 1:10 number line, any number n%1 == 0

We can start to think of the difference of any two integers n, as the multiplicative identity of a new number line, and the floating point component of quotient of any number n to the difference of any number n-m, as the additive identity.

let n =697
let m = 185
n-m == '1' (for the 1:185 line)

(n-m) * ((n/(n-m))%1) == '0'

As we can see just like on the integer number line, n%1 == 0
or in the case of 1:185, it equals 142, our additive identity.

And now, the purpose of this long convoluted post: all so I could bait people into reading a rant on division by zero.

Am I missing something here? Or did moment forget how to math?

Having a degree in math helpes immensely with programming. Abstract reasoning, calculation simplification, sussinct data representation, nice things to have.

I don't like vector math for gamedev. It's not that it's hard. Vector math isn't hard until operations become O(n log n). It's that it's unintuitive, slow to write, and when I finally come to a solution after arduous number crunching, it always looks obvious, boring and kind of ugly. I don't think I could ever write a piece of vector math that I could be proud of.

We were in math class at computers because we should test our math skills. Had some HTML skills at that point So on the score page changed my score to the best score. The first time I experienced the chrome developer tools.

any mathematician turned devs here?

I think developers with a formal mathematical education should be the ones actually developing softwares. Ordinary developers are just good cooks who know to prepare these recipes by knowing to mix and manage the Ingredients through their experience, developing software using various libraries and frameworks, I don't understand what innovation we devs do in it, makes me feel less passionate about my work sometimes.

(I embrace the fact that being a developer requires an arstisic craftsmanship to do it properly)

Math is like a language syntax. You understand the meaning of needed symbols and keywords, then you can write it the way you want.

Physics is like a framework. You have to understand how problems can be solved using patterns someone else thinks is the best way.

This is what I think when I should be reading for the big test of physics and math for upper secondary school.

heres something interesting:
The golden ratio is 1.618...

If you're not familiar with it, doing 1/goldenratio
the result is 0.618...
It gives you back the float component exactly.

Discovered that it is actually part of a series.

First of all:
2-(((5-sqrt(5))/2)-1) =
1.618033988749895 -> thats our golden ratio

In other words:
(2%gold) =
0.381966011250106

While:
((5-sqrt(5))/2) =
1.381966011250105

Ok, now we're getting somewhere. We can turn these into variables

First of all, lets see if we can get the golden ratio back out:
2-(((5-sqrt(5))/2)-1) = 1.618033988749895

Okay good.

The formula looks something like
j-(((i-sqrt(i))/2)-1)

Where j = (i*2)+1
That means we can easily figure out what j we need from our i value. (i-1)/2 = j

We run it back far enough we get
1-(((3-sqrt(3))/2)-1) =
1.3660254037844386

Thats the golden ratios little brother. Doesn't look anything like it, but it is part of the series.
And I found a boat load of research documents scattered *all* over the net, where this number and others in the series inexplicably crop up in power series, in chemistry, and elsewhere. Just looks like random floats if you don't know better.

We can actually go lower in the series:
0.5-(((2-sqrt(2))/2)-1)
1.2071067811865475

At the lowest positive value for j, we get
0-(((1-sqrt(1))/2)-1) = 1

It's kinda elegant.

I even wrote a little script to do the conversions:
def gr(k):
....i = k
....j = (i-1)/2
....return j-(((i-sqrt(abs(i)))/2)-1)

The dots are so devrant doesn't break pythons formatting.

I have an internship at some research company. My point is making face recognition apps with prog lang I know. This place is awesome. Well, compsci it's not my background, but I met many people. And they are great at math ....
.....

... Like they do 29 gray-scale images as a vector for PCA algorithm with size 64x64 pixel and COUNT A COVARIANCE MATRIXES WITHOUT TOUCHING ANY CALCULATOR OR PEN AND PAPER AND GET THE RIGHT NUMBER!

Man, this is insane. I don't even know 64x64. I love compsci