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Galois group
  • Member for 10 months
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  • Russia
9 votes
Accepted

Proving that $\lim_{ n \to \infty} \left\{ \frac{1}{2^{m n}} \sum_{r=1}^{2^n-1}(-1)^r r^m\right\}=-\frac{1}{2}$ independently of the value of $m$.

5 votes
Accepted

Asymptotic analysis of $e^{H_n}$

2 votes

Prove that $\lim_{x\rightarrow\infty}f(2x)-f(x)=0$ using the Mean value theorem

2 votes

Why does $\sum_3^\infty \frac{1}{n\ln n -n}$ diverge?

2 votes

About IMO 1989 - Problem 5

2 votes
Accepted

Equivariant splitting of short exact sequences with a $\mathbb {Z}/2\mathbb{Z}$-action

1 vote

Prove irreducible cubic polynomial over $\mathbb{Q}$ with a cyclic galois group has real roots

1 vote
Accepted

The join construction with spheres

1 vote

Linear algebra problem involving positive definite matrix

1 vote

Finite-dimensional faithful representation of a matrix algebra is completely reducible

1 vote

Convolution with delta in complex plane

1 vote
Accepted

Question about flat base-change

1 vote
Accepted

Does vanishing of $H^1$ for every open subset imply vanishing of higher cohomology generally?

0 votes
Accepted

Is there any spin group $Spin(n)$ for any value of $n$ which is isomorphic to $SU(3)$?

0 votes

Is it known whether the “sum of 3 cubes” problem has any parametric solution for integers other than 1 or 2 or multiples?

0 votes

Limit comparison test for infinite series

0 votes
Accepted

Why do these two schemes intersect properly?

0 votes

Galois group of $x^6-5$ over $\Bbb{Q}$.