Hagen von Eitzen

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23493
bio website von-eitzen.de/math/tntrep.xml
location Bonn, Germany
age 47
visits member for 8 months
seen 6 mins ago
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I did study math and had a knack for it, but I am sooo out of that business now ...


1,729 Answers

newest activity votes
6
Factorize $f(x)=x^p−x $ into a product of irreducibles in $\mathbb ℤ_{p}[x]$
6
Show that if each $X_k$ is open in $X,$ then $X$ is simply connected.
6
Integers with 15 divisors (from brilliant.org)
6
$\lim\limits_{n\to\infty} \frac{n}{\sqrt[n]{n!}} =e$
6
Finite intersection of open sets
6
Units in exponent - e.g. solve: $2^{3 years}$
6
The absolute value of a Riemann integrable function is Riemann integrable.
6
If $A$ is invertible, so is $A^*A$
6
Can a non-zero vector have zero image under every linear functional?
6
A question on Remainder Theorem
6
Does the shortest path have no crossings?
6
Surjectivity in exact sequence coming from the sheaf axioms
6
How to find the sum of all entries in the matrix $A^5$
6
Number of strings of length n formed by $\{0,1,2\}$ such that $1$ and $2$ do not occur successively.
6
Why $U\le A \times B$ does not imply $U=\left(A\cap U\right) \times \left( B \cap U \right)$?
6
Proving at least 99 pairwise sums of the reals are non-negative
6
Question about the $\epsilon-\delta$ definition of continuity of function
6
Irreducibility of a polynomial
6
Prove that for $A_k$ and $A_{k+1}$ when $A_n=n^2+3$, their largest common prime factor $\leq 13$
6
Can a cubic that crosses the x axis at three points have imaginary roots?
6
Topologically equivalent metrics
6
Continuity of the sign function
6
How to prove that G is a cyclic group
6
Derivate of $(\sin \theta)^{n-1}$
6
$\bigcap\limits_{n=1}^\infty A_n$ vs $\bigcap\limits_\infty^{n = 1} A_n$
6
Divide circle into 9 pieces of equal area
6
How to find constants a and b in this function?
6
How do I prove that a map from a quotient space is continuous
6
Finding all real zeros of the polynomial?
6
Is there a nontrivial semidirect product of two groups isomorphic to their direct product?
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