1,506 reputation
825
bio website about:blank
location Berlin, Germany
age 19
visits member for 3 years, 6 months
seen 15 hours ago

I'm a highschool student from Germany interested in functional programming, especially Haskell.


Mar
5
accepted Equality of polynomials: formal vs. functional
Mar
5
comment How to prove the equality $\sum_{j=0}^n (x)^j (-1)^{n-j} \left\{{n \atop j}\right\} = x^n$?
Is your $(x)^j$ the same as $x^\overline{j}?$
Mar
5
comment Equality of polynomials: formal vs. functional
@Harry Stern: Yes :)
Mar
5
comment Equality of polynomials: formal vs. functional
@Qiaochu Yuan $a_k, b_k \in \mathbb{C}$
Mar
4
comment Equality of polynomials: formal vs. functional
Sorry, formulated the question wrong.
Mar
4
revised Equality of polynomials: formal vs. functional
added 73 characters in body
Mar
4
comment Equality of polynomials: formal vs. functional
@Jason DeVito: $a_k$ and $b_k$ are just coefficients. They're independent of $x$.
Mar
4
asked Equality of polynomials: formal vs. functional
Feb
23
accepted Three non-coplanar lines in the 3D-space always have a fourth one that intersect them all?
Feb
23
comment Three non-coplanar lines in the 3D-space always have a fourth one that intersect them all?
This proof is the easiest to understand for me. Thank you.
Feb
13
comment Does the formula $\sqrt{ 1 + 24n }$ always yield prime?
Uhhh... That's difficult. Thanks for this link.
Feb
12
comment Does the formula $\sqrt{ 1 + 24n }$ always yield prime?
Changed. I thought it's very difficult or impossible to find a prime generating function which only yields primes. Can you give me an example?
Feb
12
revised Does the formula $\sqrt{ 1 + 24n }$ always yield prime?
added 24 characters in body
Feb
12
answered Does the formula $\sqrt{ 1 + 24n }$ always yield prime?
Feb
12
awarded  Commentator
Feb
12
comment How can I systematically find a solution to this problem?
That was my approach before. With the reposity formula for geometric sequences, you can even find a closed form for even / odd $n$. But I considered it uggly, as it's unusable if you can't spot such pattern.
Feb
12
comment How can I systematically find a solution to this problem?
Has this method a specific name?
Feb
12
accepted How can I systematically find a solution to this problem?
Feb
12
comment How can I systematically find a solution to this problem?
That's cool. Thank you very much.
Feb
12
comment How can I systematically find a solution to this problem?
I'm a bit confused - can you explain the exact procedure on my example equation?