What's the first proof(s) to ever make you go "ey that's pretty clever"?
Apparently most people's first formal proof seen is the irrationality of sqrt(2) or some geometry proof for volume, but those never really tickled the ol' brain cell or felt interesting.
For me, I'd say the first proof I found interesting was Euclid's proof of infinite primes.
(pic unrelated)
Gabriel Johnson
irrationality of sqrt(some odd number) better than sqrt(some even number)
Carson Morgan
>>>/reddit/
Jonathan Bennett
>being annoyed by facebook comics about being socially awkward (a.k.a. normal) is now a right-wing extremist view guess I'm alt right now
Also, Euler turning the zeta function into a product involving primes was the most jaw-dropping proof I've read at the time.
Andrew Garcia
are you the guy that's been posting "back to " on every thread for the past days, even the ones that aren't related to politics at all ?
y ?
Jayden Rivera
Also Euclid's proof of infinite primes. But since it's been said already, I like the Spanish Hotel Theorem and it's proof.
Luis Ward
Not really the proof but the realization that e is just the sum of some specific rational numbers, but something about adding an infinite number of them makes the sum irrational.
Henry Davis
Oresme's proof for the divergence of the harmonic series is pretty cool:
So the harmonic series must diverge. It also nicely illustrates why the series diverges at logarithmic rate.
Sebastian Long
Delet this t. Manchild pretending to be self-aware
Zachary Richardson
You just know that whoever made this was as much of a manchild as her.
Nicholas Miller
well every irrational number can be the infinite sum of rational numbers.
ex. sqrt(2) = 1/1+4/10+1/100+4/1000+...
Ian Brooks
When I was in middle school I was able to prove there are infinite primes using math. I thought I was a genius but I was thousands of years too late.
Euclid's proof is much better.
Nolan Cruz
I don't think that proofs are necessarily beautiful, rather what we can draw from those proofs.
I think that that the Sieve of Eratosthenes is the most stimulating, as it is simple in concept but has still stood the test of time for all these years. Even the Sieve of Atkin isn't as great.
Ryder Gonzalez
Found the "artist" lampooned in OPs pic.
Blake Sanchez
>So the harmonic series must diverge. It also nicely illustrates why the series diverges at logarithmic rate. No, it doesn't. If it was an equality, it would
Kayden Miller
What was your proof? I never proved it, I just assumed it was true and took it for face value.
Jacob Scott
What is the point of this post? You don't actually think she would be on Veeky Forums.
Jace Peterson
Nice damage control.
Ian Cruz
The partial sums do grow logarithmically.
Noah Price
That may be the case, but it doesn't follow from that proof of it's divergence.
Henry Hill
That's why I said it illustrates it, not proves.
Landon Roberts
Bolzano–Weierstrass theorem
Ayden Bell
proving the double angle identities in trig.
Adam Perry
...
Ian Williams
Model of supply and demand I remember was the first time I actually understood a part of how the universe works. Another one was proof of evolution. That shit was beautiful and pretty much explained all of the questions I had back then.
But even after my intense studies in physics and mathematics, I still cannot answer the first question I asked when I was about 5 years old: how do I get rich? Thats simply the most important solution a man should ever ask for.
Evan Gutierrez
true wealth comes from love of your friends and family :)
Jack Morris
>true wealth comes from love of your friends and family :) t. poorfag
Jackson Carter
Goursat integral lemma. It is a theorem that is Cauchy's integral theorem but for triangles. Our lecturer wanted to give us more intuition about Cauchy's theorem than by just proving it through Green's theorem, and it was very involved with geometry, and very interesting and long proof, that involves creating an infinite sequence of triangles that converge to a point.
Juan Brooks
i learned it that way too, was nice (from Stein/Shakarchi's book i think)
Benjamin Young
I really loved that class actually, because the lecturer was incredible, and really, all the results in complex analysis are surprising (liouville, holomorphic implies analytic, residue theorem), and it gives a lot of motivation for the study of algebraic topology/homotopy theory.
It may be because I havent seen that much algebra, but the deep theorems in analysis definitely have the best proofs
Connor Gomez
Nah, the people who say money doesn't matter are usually richfags who don't know what it's like to live without it.
Jose King
But it is true. Money doesn't make you happy.
Wyatt Cox
some studies show that money does make you happy, but suffers serious diminishing returns after 70k a year.
Nicholas White
I've read that too, people making ~70k are frequently the happiest because they basically can get every fairly reasonable want they desire but aren't rich enough to be swamped in work or investments and aren't pestered/shamed/outed by poorfags
Henry Taylor
>proof of evolution
nice 1 dude; almost got me
Luke Parker
eulers solution to the basel problem awed me the first time i saw it
Kayden Murphy
The irrationality of sqrt(2) was also he first prove ever saw, but there is a far better version with prime decomposition, that also explains the n-th root and why it is either natural or irrational.
I actually have no idea what was the first I really liked, but I am reading euclids elements at the moment and it is full of really cool proofs.
Michael Gutierrez
money can give you freedom, which makes me pretty fucking happy :)
Levi Ross
In calc 3 we proved that an open set is connected if and only if it's path connected. We separate the set into two disjoint open subsetst in a really neat way for a contradiction.
Isaac Thompson
Euler's proof for the partition of a numbers using generating functions Euler's derivation of the product over primes formula from the zeta function
Truly the master of us all
Carson Nelson
Sarah is a legit 10/10 the only reason she makes strips like the second panel is to leech off uggos
John Barnes
the implications you get from a set of numbers just by applying pigeonhole principle
Christopher Richardson
the proof of abc conjecture
Logan Garcia
That there isn't any purely rational number p/q, for which p^2/q^2 = k. In other words proving for a square root of some integer to be irrational only requires you to find its decimal approximation, instead of doing a few more lines of equations about more number theory.
Ayden Lewis
pythagoras theorem sum of angles of a triangle quadratic formula sqrt(2) definition of a limit
Tyler Nguyen
Infinity of primes Uncountability of the reals
Nolan Sanchez
Godel's incompletude theorem
Ian Hall
gynocentrism needs to be destroyed
Carson Myers
nash's theorem
Hudson Myers
Here's a proof I didn't like, was that every ball of infinity norm is compact (proof by contradiction)
Joshua Williams
I'm not sure. It could have been that the inverse function of an increasing (or a decreasing) function is increasing (decreasing) proved using a chain [math]x
Eli Sanchez
dumb animeposter
Lucas Young
"if and only if" is not correct though, the Topologist's Sine Curve is a counterexample where it is connected but not path connected.
Grayson Gomez
Polygonal path connected and we were in R^n
Jeremiah Howard
Plus it needs open I specified.
Blake Fisher
my mistake
Daniel Reyes
Huh?
Blake Bennett
Proof that there exist irrational numbers x, y such that x^y is rational
Cooper King
pi ^ (1/pi) = 1
Dominic Green
sigh...(You)
Jackson Cruz
That is not an open set.
Jack Ortiz
this is simply not true in all topological spaces. Maybe you did the case for R^n or some other simple pleb shit
Aaron Collins
>calc 3 >topological spaces of course it was done in R^n you pretentious retard
Dominic Brooks
Not really a "proof", but the first time I was genuinely astounded by math was in Calc II when my professor showed how Gabriel's Horn had a finite volume but a divergent surface area. Still hard for me to believe.