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apr 23 at 2:15
Compute $\lim_{n\to\infty}\frac{1}{n^3}\sum_{1\le i<j<k\le n} \sin\left(\frac{i+j+k}{n}\right)$
apr 10 at 0:11
Rational $n,q$ for which $n^2+q^2=1$
mar 27 at 13:46
Does this equation have integer solutions
mar 6 at 21:29
How to evaluate these $4$ integrals?
mar 5 at 11:37
How can I evaluate this limit?
jan 11 at 19:19
Proving an alternating Euler sum: $\sum_{k=1}^{\infty} \frac{(-1)^{k+1} H_k}{k} = \frac{1}{2} \zeta(2) - \frac{1}{2} \log^2 2$
dec 28 at 19:43
How is this a property of Pascal's triangle?
dec 28 at 12:03
How to evaluate the series $1+\frac34+\frac{3\cdot5}{4\cdot8}+\frac{3\cdot5\cdot7}{4\cdot8\cdot12}+\cdots$
dec 26 at 5:41
Large integer help
dec 24 at 10:05
Proving that $\left(1+\frac{z_{1}}{z_{2}}\right)\left(1+\frac{z_{2}}{z_{3}}\right)…\left(1+\frac{z_{n}}{z_{1}}\right)\in\mathbb R$
dec 16 at 11:17
How to find $1/x^3 + 1/y^3$?
nov 8 at 0:26
Prove that $\sum_{k\ge 1} k/(k+1)! = 1$
oct 29 at 22:35
Composition of two functions is constant
oct 28 at 7:33
Why $\cos^2 (2x) = \frac{1}{2}(1+\cos (4x))$?
oct 25 at 22:22
Is this sum related to the Gregory's limit?
sep 26 at 18:47
finding $\frac{3}{1!+2!+3!}+\frac{4}{2!+3!+4!} +\frac{5}{3!+4!+5!}+\cdots+\frac{2008}{2006!+2007!+2008!}$
sep 19 at 3:51
Geometric interpretation of Young's inequality
jul 3 at 20:28
${10 \choose 4}+{11 \choose 4}+{12 \choose 4}+\cdots+{20 \choose 4}$ can be simplified as which of the following?
jun 25 at 13:14
Does $\sum^{\infty}_{n=1} n/(n-1)!$ converge to something?
jun 25 at 2:09
Different ways of coloring a $4 \times 4$ game board
jun 24 at 23:24
What's the formula of this sequence?
jun 24 '12 at 0:39
Prove that $\sin(2A)+\sin(2B)+\sin(2C)=4\sin(A)\sin(B)\sin(C)$ when $A,B,C$ are angles of a triangle
jun 24 '12 at 0:39
A logarithmic equation?
jun 20 '12 at 16:08
Eigenvalues and Diagonalization
jun 14 '12 at 18:38
Infinite products - reference needed!
jun 13 '12 at 21:43
Show that $f'$ is not continuous at 0 for the following function:
jun 13 '12 at 21:43
Prove that $\frac{{a}^{2}}{b-1}+\frac{{b}^{2}}{a-1}\geq8$
may 30 '12 at 12:35
Why is Euler's Identity stated the way it is?
may 24 '12 at 19:08
$\lim_{n\to\infty} \left(\frac{1^p+2^p+3^p + \cdots + n^p}{n^p} - \frac{n}{p+1}\right)$ Evaluating this limit
may 21 '12 at 6:36
Is the determinant of a matrix lower when all its elements are lower?
apr 23 '12 at 23:25
Proof of Euler's Theorem without abstract algebra?
feb 12 '12 at 1:19
Evaluate $\sum\limits_{k=1}^n k^2$ and $\sum\limits_{k=1}^n k(k+1)$ combinatorially
feb 4 '12 at 22:22
Analyticity of a function depending on $z$ and $\bar{z}$
dec 4 '11 at 14:35
Determinant of a generalized Pascal matrix
oct 17 '11 at 8:40
How to raise a complex number to the power of another complex number?
oct 17 '11 at 8:40
evaluate the last digit of $7^{7^{7^{7^{7}}}}$
oct 17 '11 at 8:40
Does the formula $\sqrt{ 1 + 24n }$ always yield prime?
oct 17 '11 at 8:40
Intuitive explanation of a positive-semidefinite matrix
oct 17 '11 at 8:40
If $f$ continuous and $f(x^2) = f(x)$, then $f$ is a const
oct 17 '11 at 8:40
Combinatorial Proof of Binomial Coefficient Summation
oct 17 '11 at 8:40
If c is an eigenvalue of $A$, is it an eigenvalue of $A^{\mathbf{T}}$?
oct 17 '11 at 8:40
Making use of Fourier series to evaluate an infinite sum
