Marko Riedel

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Well it's me, Marko Riedel. ;-)


147 Answers

newest activity votes
13
Compute $\sum_{k=1}^{\infty}e^{-\pi k^2}\left(\pi k^2-\frac{1}{4}\right)$
feb 8 at 22:40
10
How to prove this identity $\pi=\sum\limits_{k=-\infty}^{\infty}\left(\frac{\sin(k)}{k}\right)^{2}\;$?
mar 16 at 3:48
9
Proof of $\frac{1}{e^{\pi}+1}+\frac{3}{e^{3\pi}+1}+\frac{5}{e^{5\pi}+1}+\ldots=\frac{1}{24}$
may 12 at 23:25
8
Closed form for $\sum_{n=-\infty}^{\infty}\frac{1}{(n-a)^2+b^2}$.
may 9 at 20:33
6
Bubble sorting question
nov 26 at 16:51
5
Closed form sum of $\sum^{\infty}_{n=1} \frac{1}{3^n-1}$
mar 24 at 23:28
5
Integral $\int\limits_0^\infty \prod\limits_{k=0}^\infty\frac{1+\frac{x^2}{(b+1+k)^2}}{1+\frac{x^2}{(a+k)^2}} \ dx$
feb 27 at 5:33
5
Identity for $\zeta(k- 1/2) \zeta(2k -1) / \zeta(4k -2)$?
nov 28 at 23:55
4
How to show that this function (related to the zeta function) is even?
jun 13 at 22:27
4
Evaluating a trigonometric integral using residues
apr 21 at 1:28
4
Summation of series using residues
apr 12 at 22:49
4
How many 2-edge-colourings of $K_n$ are there?
feb 26 at 3:25
4
contour integration of logarithm
feb 12 at 22:35
4
How many ways can one paint the edges of a Petersen graph black or white?
jan 20 at 22:42
4
Number of acyclic digraphs on $[n]$ with $k$ edges and each indegree, outdegree $\leq 1$
dec 23 at 22:00
4
Question on Euler Totient, and finding a function
nov 19 at 21:51
3
Closed form of $\sum\limits_{i=1}^n\left\lfloor\frac{n}{i}\right\rfloor^2$?
jun 7 at 22:53
3
$\sum_{k=1}^n m(k)$, where $m(k)$ is defined by $2^{m(k)} || k$.
may 23 at 20:52
3
Evaluating $\sum_{n=1}^{\infty} \frac{n}{e^{2 \pi n}-1}$ using the inverse Mellin transform
may 20 at 1:43
3
Proof of $\frac{1}{e^{\pi}+1}+\frac{3}{e^{3\pi}+1}+\frac{5}{e^{5\pi}+1}+\ldots=\frac{1}{24}$
may 13 at 23:34
3
Dirichlet series generating function
may 7 at 1:45
3
Proof of the number of partitions.
apr 20 at 21:02
3
Missing term in series expansion
mar 22 at 4:45
3
Number of permutations of a specific cycle decomposition
mar 15 at 23:44
3
Amount of ways to add M nodes to a N length cycle without extra cycles
jan 22 at 4:49
3
Asymptotic expansion of a series
jan 3 at 19:47
3
contour integration $\int_0^\infty \frac{dx}{x^p(x^2+2x\cos{\phi}+1)}$
dec 9 at 1:18
3
Evalulate $\int_{-\infty}^{\infty}\frac{1}{(1+x^{2n})^2}dx$ by using residue theorem
nov 20 at 18:38
3
Counting the sum of cycles of the elements in $S_n$.
oct 17 at 23:28
2
Determining upper bound for the sum $\sum_{n=1}^\infty \frac{1}{2^n - 3^n }$
jun 7 at 2:25
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