123,661 reputation
8117239
bio website von-eitzen.de/math/tntrep.xml
location Bonn, Germany
age 48
visits member for 2 years, 3 months
seen 5 hours ago

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


Dec
16
revised Solve $f\left(\frac{x-3}{x+1}\right)+f\left(\frac{x+3}{x+1}\right)=x$ $\forall x\neq -1$
added 6 characters in body
Dec
16
revised How to define a transition matrix mathematically?
added 290 characters in body
Dec
16
revised Why is $\varphi$ called “the most irrational number”?
added 3 characters in body
Dec
16
revised Proofs involving positive real numbers
added 5 characters in body
Dec
15
revised Showing $\gamma < \sqrt{1/3}$ without a computer
deleted 1 character in body; edited title
Dec
15
revised A possible defining characteristic of primitive roots.
added 18 characters in body
Dec
15
revised Suppose $P(X \in B) \in \{0,1\}$ for all $B \in \mathcal B(\mathbb R)$. Show $X = c$, $P$-almost-surely.
added 251 characters in body
Dec
15
revised Order of $\mathrm{GL}_n(\mathbb F_p)$ for $p$ prime
edited body
Dec
15
revised $f:\mathbb R\to\mathbb R$ continuous function. Which of the following sets can not be image of $(0,1]$ under $f$?
added 253 characters in body
Dec
13
revised Value of $K$ so that $f(x)=3x^3+6x^2+KX-4$ has the same remainder when it is divided by $x-1$ and $x+2$
added 8 characters in body; edited title
Dec
13
revised isomorphism and circle group
added 16 characters in body
Dec
13
revised How prove each $k$ there exits infinite set of numbers $n$, are divisible by $m$
added 5 characters in body; edited title
Dec
12
revised show that there exist an element $g$ of a group $G$ such that $g^q$ is in $H$
added 23 characters in body; edited title
Dec
12
revised Help with Random High Card Probability Question
added 115 characters in body
Dec
12
revised Construct quadrangle with given angles and perpendicular diagonals
added 109 characters in body
Dec
12
revised Construct quadrangle with given angles and perpendicular diagonals
added 49 characters in body
Dec
12
revised Help with Random High Card Probability Question
added 457 characters in body
Dec
12
revised Help with Random High Card Probability Question
edited tags
Dec
10
revised Solve $f\left(\frac{x-3}{x+1}\right)+f\left(\frac{x+3}{x+1}\right)=x$ $\forall x\neq -1$
added 294 characters in body
Dec
9
revised How do you do this *without* using a calculator? The ratio of three numbers is $3\frac{1}{3}:4\frac{1}{5}:6\frac{1}{8}$
deleted 21 characters in body