Rules and stuff
tl:dr No NSFW-stuff. Homework-questions allowed. Apparently hotwheels is a faggot and somehow fucked up the TeX-rendering.Sorry for being late about this; I simply forgot this thing existed. I believe that this may be interesting, and serve as a nice alternative to other ways of communicating mathematics. In particular, I wish for this board to act as an alternative to math.SE, where soft questions are less frowned upon. Homework-questions are, for the time being, allowed. I see no reason to leave them out as long as they are related to math.
Category theory
What do you guys think about type or category theory as a basis for the mathematical edifice rather than set theory?
Personally I don't think there is any point to it, but I would love to hear some arguments to the contrary.
What is the more practical foundation for mathematics?
Is there an equivalent modular arithmetic for complex numbers
(|2-log x|/3)+(|2-log x|/6)+(|2-log x|/12)+... <= 4/3 is true only if:
a) 0 < x <= 10^-4
b)10^4 < x <= 10^-3
c)10^-3 < x <= 10^-2
d)10^2 < x <=10
e)10^0 <= x <= 10^4
Philosophy time!
My friends and I have this argument all the time.
Is math a fundamental property of the universe, or is it something that humans invented to describe our observations?
To phrase it another way:
Is math objectively true, or is it a human construct?
I'm in a seminar-style mathematics class in my high school, for the best-of-the-best of high school. The first assignment of the year was to write a proof for a given question.
Mine was: pic related.
I had come up with a bit of a hack solution, and was what mathanons could come up with. I'll post my proof once I prettify it in TeX.
I'm fucking retard and don't know how to solve it.
5x²+(2m-1)x+(m-5) = 0
m = ?
Δ > 0
Proof
Working through Serge Lang's Basic Mathematics atm (thx /prog), and I seem to have arrived a different proof for one of the exercises than the answer given. Pretty sure it's solid, but I need to check in case my logic is faulty.
Let a = m/n be a rational number expressed as a quotient of integers m, where neither m nor n = 0. Show that there is a rational number b such that ab = ba = 1.
My answer: If b = 1/a, then ba = ab = a(1/a) = 1
Also, Lang's book rocks.
so lads I'm looking to learn Math where should I start?
Is there such a thing as a 4-way Merkel tree?
A way of relating partial information not as counterparts, but as hints to a search.
I was going to post is the comp sci boards, but I think this involves patterns more than systems techniques.
There will be win if this doable.
For example, Merkel trees are usually created by concatenating two values, but they can also be created using the XOR operation.
Say you have 4 data sources A, B, C, D and xy means x XOR y.
You can broadcast the root of the tree ABCD (A XOR B) XOR (C XOR D) as a way to retrieve partially available data.
The idea is that if you know AB and ABCD then you get CD for free,.
In a 4-way Merkel tree, knowing the root and one of the four branches gives you the 3 you don't have.
Prime factorization could be one way to do it.
The branches could also represent ranges for values rather than the values, revealing the values less ambiguously as you find more of the branches.
The real fun begins when you have 6 ways the four pieces can appear:
AB, AC, AD, BC, BD, CD
If the 4-way Merkel can be generalized to n-way then by permutations we have geometric performance increases.
Halps, me Anon Kenobi.
There will many straws to drink the big milkshake if this works.
Why do normalfags hate math so much? I love math, it's an elegant, self ordered system
I come to you because I do not like signing up to forums. Here is my problem. It's from the book Calculus: An Intuitive and Physical Approach by Morris Kline.
>An objects slides down an inclined plane OP' starting from rest at O, which is the top of a circle of diameter OP, where P and P' lie in a horizontal line. Show that the point Q reached in the time, t, required to fall straight down from O to P lies on a circle with OP as diameter.
Up until now it was going ok with familiar physics problems done in a way to explain derivatives. Never took trig.
Math, from the start
So if there were a list (I'm sure there is, but I strangely can't find it using any reasonable search terms) of basic mathematics concepts, what would it be?
1. Counting
2. Addition
3. Subtraction
4. Integers
5. Multiplication (including powers)
6. Fractions
7. Division
8. Roots
9. Permutations
10. Variables
What have I left out?
I'm trying to teach someone math from the very beginning and I'm sure that it can be done in far less time than the decade it would take in an ordinary American public school. I'm aiming for four years from "how to count" to knowing how to solve a quadratic equation. Before anyone suggests that this is unreasonable, I should add that I took Algebra when I was 8. (Catholic school, of course.)
Why is /v/ so retarded?
Hi /math/. I'm trying to design a scaling table for Dungeons and Dragons and my problem is thus:
"John designs a game. In it, people roll two dices, both of 20 faces. These two dices calculate the score.
When John rolls a result of 1 on the first dice and rolls a result of 1 on the second dice, he gets a score of 10.
When John rolls a result of 20 on the first dice and rolls a result of 1 on the second dice, he gets a score of 10.
When John rolls a result of 1 on the first dice and rolls a result of 20 on the second dice, he gets a score of 1.
When John rolls a result of 20 on the first dice and rolls a result of 20 on the second dice, he gets a score of 1.
In summary, a result of 1 on the second dice always scales the the first dice's result into a score of 10. A result of 20 on the second dice makes the the first dice's result become the score
Design a formula or two formulas, one for numbers under and one for numbers over 10, for this game.
"
geology trigonometry
Hi guys, I’m trying to build a model of something in excel, but I need to be able to find the xyz coordinates of the four corners of a rectangle where the rectangle is specified as follows:
Midpoint x: x
Midpoint y: y
Midpoint z:z
Lenth: l
Width : w
Dip (angle of surface from X-Y plane(degrees)) : d
Dip direction (angle of surface from X-Z plane(degrees)) :dd
I know that this is a trigonometry problem involving sin and cos for each of the axes, but having trouble working out each of them and describing them accurately.
It’s been a long time since I did much of this sort of thing. Could anyone help me out?
Any mathematician here?
Proving inequality
Pic related. How do I prove an inequality like this. Don't really care about this one specifically but how would I go about it in general?
So, in my lack of math classes over the last few years of college and my time off of high school I have forgotten how to do part A in problem 22. Also, please correct me if (when) im wrong, but the answer to part B should be that the slope represents the relation of the cost to produce to the units.
the y intercept (which means the place where the line crosses over the y axis right) represents where it either becomes more effective or less effective to produce that many appliances at that cost. (I would have to graph it and look at it.
And I also have a question about part c of the second photo (problem 27). If my math is right, the inverse equation is y=log_2 (1/x)
which i got for solving for y in said equation. But I dont understand what this means in relation to the question it self.
Is this board dead?
lol
>>>/tv/res/117721.html
check my prime
Factor your post number and tell us any other interesting things about it.
What are the best High School tier math textbooks?
Did you know much of the mathematic theory and practice we still use today was invented by Muslims? Join our board to learn more!
ITT times you dun goofed
>hum dee da working on graph theory take-home test>hmm question one seems interesting
>prove prove prove
>what a nice proof
>only one page
>...
>misread the problem
>actual problem requires only two lines
How many tennis balls are there?
>Top 3 posts are inane shitposting
Let's fix that.
What are your favourite non-textbook math books?
>Proofs from THE BOOK
A book full of very elegant proofs.
Have you taken the brown pill yet, mateys?
it's a tough pill to swallow! The brown pill was founded in 1999 by Sir Reginald Brownpill, who presents and narrates the attached video.
Forget red and blue pills, brown pills are the way of the future.
Video related. Please leave your questions, comments, and concerns below about this radical new paradigm of thinking!f
Swallow the brown pill today! Red pills are for fedora fucking wearing faggots, blue pills are for the ignorant masses. Ignore the other le epin /pol/ maymays, this one is the readl deal.5457547548548457
Hello, this place seems really dead but I'll try anyway.
If you were to brush up on high school level math. Where do you start?
I'm currently running through khan academy and using some books taken from here
http://www.math.kent.edu/~mathweb/ebooks/
Are these enough to work with? It seems all so confusing. I'm 22 and haven't touched any sort of academically inclined math in several years.
It would seem like the Math-rendering does not work. ($x^2$)
Until this is fixed, no further changes will be made to the board, as it is essentially useless.
Finish this
34 128 210 432 925 4512 3458 7056 __ __
answer format: 2 number and a space between
This board needs better moderation.
There should be one thread for homework, not one more. Rest should be serious math.
Shitposting threads should also be eliminated with no hesitation or mercy. No -1/12 or 0.999... shit.
The glorious nexus of shitposting
M A T H I S S H I T
A
T
H
I
S
S
H
I
T
Does /math/ play Plarrenheim's Constant?
If we consider the Chinese Diffusion Principle, then P's C would be x^2 divided by the root of bacon's density plus three.
From this follows that Nightenton's Equation applies, which would mean that we have to consider the Trinitas Absolute.
Therefore, x = 2,37 X 68c to the power of y, where y > the mean velocity of the moon.
In turn this means that one is to add Harris' Shortcut into the Einstein Bargain, which means that Plarrenheim's Constant would be exactly 129.
Your move, /math/.
I don't understand a thing about logic:
Let's say
p->q
if p is False and q is True, then p->q is True.
But why? Why it isn't something like "undefined"?
Because if p is True and q is False, we know that p->q is False, or if p is True and q is True, we know p->q is True.
The rule was p implied q, and that's it.
There is no information about what should happen if p is False, or if both p and q are False, so why in those cases should we define p->q as True?
Now, it is obvious that I'm missing something, can you help me fine what?
which equation does the graph of the systems of equations solve?
x2 − 2x + 3 = 2x2 − 4x − 3
x2 − 2x + 3 = 2x2 − 4x + 3
−x2 + 2x + 3 = x2 − 4x + 3
−x2 − 2x + 3 = x2 − 4x + 3
Newfag here. I just discovered this board. Anybody up for some brute force partial fractions?
Hello /math/
I was on the hunt for a list of self-study books that goes from High school level to undergraduate level or whatever you guys call it in the states.
So far I've some shit for Calculus and Linear Algebra, and another recommendations for Discrete mathematics, and stuff like that.
However, I'm struggle to find a nice self-contained book with rigorous math for High School. You know in order to have a nice foundation.
So far I've been recommended with Serge Lang's "Basic Mathematics" and "A Course of Pure Mathematics" by G. H. Hardy.
What do you guys recommend?
tl;dr op needs a rigorous high school math book to set a nice foundation for the upcoming shit.
A little help?
2x+3y=12-x+y=-1
If someone could answer and explain this to me that'd be swell
Trigonometry
Hey /math/, I'm doing high school math and I'm getting real confused; what's secant, cosecant and cotangent (more than being reciprocals)? Also what use do they have? It feels like they were only created to fuck people up in their math studies and make them learn more for no particular reason.>inb4 OP can't do simple maths
>inb4 OP can't inb4
I am getting stuck on what should be a simple integration.
Tried solving it the way I know and got 6e, which is wrong.
Picrel uses normal partial integration, but there are two constants which just appear out of thin air from my understanding, please send help.
I doodle sometimes. I did this:
Take a regular polygon of n sides. Create a copy of that polygon and fit it inside the first so that each point cuts the sides of the large polygon in two. The ratio of the enclosed area and the total area will be a defined value, as shown in pic related. Let this function be called A(n).I did this on graph paper to amuse myself a few hours ago and I could probably work this out myself, but I thought this board could use some activity and so here is my question. What is the general function A(n)? I suspect it is a polynomial.
Pic related has 4 values of A(n). The last one is to demonstrate that it asymptotically approaches 1 as the polygon becomes closer and closer to a circle, eventually resulting in you placing a circle inside a circle which fits its entire area, hence 1.
Since there do not exist polygons with 0, 1, or 2 sides, I was wondering if the general equation of A(n) would tell you. Would you be able to backtrack the function and assign some meaningful values to A(0), A(1), and A(2), or is the function undefined there?
https://www.youtube.com/channel/UCqmqvIej9MF8vfTBcbrFGhw
is this of any use to anyone?
I'm reviewing high school algebra and trig due to me wanting to return to university at 27 (it is free where I live).
I'm now studying functions, but I don't quite understand why they exists and are so important.
I can solve them, make operations with them, but I really don't get what's so special about them, and why we have a function called logarithmic function that is so important it required its own notation.
I know there is a reason, since I'm a pleb and in math there is always a reason, but I would like to know it in order to understand the subject better.
Can you help me in this?
yiff
hey /math/which Pokémon would you fuck?
C'mon hotwheels, be cool:
$x^2$
How do I solve this type again?
I need all the sides of the triangle, the perimeter and the radius of the circumscribed circle.
hexagons are the best shape ever. End of story.
Why am I doing shit in algebra for how simple it should be?
Pic not related
Hey /math/,
Rate my math IA
Tear it to shreds and especially mistakes.
Knock yourself out,
feel free to blatantly steal my work and call it your own.
Have fun
QUIZ TOMORROW!
Hey guys, guess what. MATH QUIZ TOMORROW!I'm in pre-calc, so can anyone give me some tips on some of these subjects?
>Evaluating trig ratios and inverses, point on terminal side of angle in relation to trig ratios, Linear Speed, Angular speed, Arc length, Law of sines and cosines, conversions, Understanding of graphs but no graphing.
Anomaly or I'm stupid?
Sup /math/fags?I'm mulling through some homework where I find an interesting inequality that I just can't seem to fucking solve.
((2-7x)/(5-4x))<4
I keep getting (-infinity , 5/4) U (2 , infinity) as the solution set for this. Even Wolfram said it is so. But when you substitute the numbers, it doesn't seem to be the case and that the right answer is actually (5/4 , 2).
Is this an Anomaly, /math/? Or am I missing something here?
Check out Wolfram yourselves:
http://www.wolframalpha.com/input/?i=%28%282-7x%29%2F%285-4x%29%29%3C4
Rosettas after-impact bouncing speed
As the topic so explicitly suggest, I wanted to have a realistic feeling of how it bounced.The mass of the comet is approximately 10^13 kg, and the distance from the ground (where it bounced to the graviti center is more or less 4 km.
We also know that after it bounced, it landed again 1h50 min after.
The gravitationnal pull isnt constant thanks to 67P being small (fuck you 67P)
So i got something like this:
d^2x/(dt)^2 * x^2 = K
where x is the distance to the comet's center of mass and K an aggregated constant.
I don't remember integrating such a system in my youth, and wolfram returns me a humongous solution.
Is it that complicated?
This board should have more traffic. Why not try to start a math project or something? No sticky? The creator of the board is not shilling hard enough.
HAVE SOME FREE PRIME NUMBERS!!!
primos.mat.br/Ate100G_en.htmlPIC NOT RELATED
Each rectangle is the sum of the two rectangles below it. Is /math/ bad ass enough to fill in all the blanks?
Yes, this is solvable and is neither overdetermined nor left with variables. The minimum information required is present. There is a faster way to win than bruteforce, and you're an idiot if you use bruteforce.
Good luck!
Excuse me.
Has anyone seen /masturbation/ near here, or are you "sorted differently" on this board?
First
u guise know any good solvers?
algebra too
http://symbolab.com/solver
http://symbolab.com/solver/simplify-calculator
OP is an idiot
I need help figuring this shit out (everything past the first question)
D'ya like dags?
[*tex]$x=x+1$[*tex]
dear mathematicians,
this is "fucking my heart"
i need help.
i have this way of finding zeros/roots
(see my scan)
what is the name of this? i think i learned this in high school.
Need an idea for a exploration, I am in the 12th grade. Any ideas? Maybe less used or creative ones please.
Also wallpaper thread
Hello I'm desperate and I need help.
I've been sitting here for 1 hour trying to figure this out and I just can't. Can someone who knows his maths please help me with this problem?
Dear /math/ematicians:
Normally I wouldn't advertise on other boards, but your's seems to be lacking in activity anyway so I figure it might be welcomed in a way.
>>>/alg/ is a help board for algorithms, and I figure you anons would fit right in.
Who /abstractalgebra/ here?
Test if MathJax-scripts work:
$x^2$