109,488 reputation
698199
bio website von-eitzen.de/math/tntrep.xml
location Bonn, Germany
age 48
visits member for 1 year, 11 months
seen yesterday

I did study math and had a knack for it, but I am sooo out of that business now ...


1d
answered The probability of $n$ being a square, given the units-digit in its decimal representation
Aug
26
answered Find isomorphism between $\mathbb{Q}[T]/(T^2+3)$ and $\mathbb{Q}[T]/(T^2+T+1)$
Aug
26
answered If $G$ is a simple $f$ an homomorphism, and $A\lhd H$ is such that $[H:A]=2$, show $f(G) \subset A$
Aug
26
answered Find the probability of winning at this lottery.
Aug
25
answered Is the Legendre sieve explicit?
Aug
25
answered Equivalence of ordered field and an order relation
Aug
25
answered derivative of $x\cdot|\sin x|$
Aug
25
answered Countable Set & Formal Grammar
Aug
25
answered Equality of cardinality of $\mathbb{N}$ and $\mathbb{N} - \{0\}$
Aug
24
answered $(A\cap B)C=AC\cap BC$ in an infinite group
Aug
22
answered Find the values of $f(0)$, $f(4)$, $f(6)$ and $f(18)$
Aug
22
answered How to solve the quadratic equation by completing the square?
Aug
21
answered The number of divisors of any positive number $n$ is $\le 2\sqrt{n}$
Aug
21
answered What's time complexity of algorithm for “Word Break”?
Aug
21
answered Is it true that a field is a vector space over a field?
Aug
21
answered For a cubic equation, prove that two critical points of the same sign imply one root
Aug
21
answered Estimate bias of a coin
Aug
21
answered Path Connectedness argument for $SO(n, \mathbb{R})$
Aug
21
answered What does linearly equivalent mean in this context
Aug
20
answered A continuous bijection from a Hausdorff space to a non-compact space which is not a homeomorphism