108,970 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 ...


2d
revised What's time complexity of algorithm for “Word Break”?
added 204 characters in body
2d
revised A continuous bijection from a Hausdorff space to a non-compact space which is not a homeomorphism
added 353 characters in body
Aug
20
revised How to bound the following sum
added 208 characters in body
Aug
20
revised Show $H_n$ is a subgroup of $G$ for any $n\in\mathbb N$
edited tags
Aug
20
revised Evaluating the limits $\lim_{(x,y)\to(\infty,\infty)}\frac{2x-y}{x^2-xy+y^2}$ and $\lim_{(x,y)\to(\infty,8)}(1+\frac{1}{3x})^\frac{x^2}{x+y}$
added 17 characters in body; edited title
Aug
20
revised General form for $2\int_{0}^{\infty} \frac{1-t^2}{(1+t^2)((a+b)t^2+a-b)} \mathrm dt$
Maybe this makes sense ...
Aug
11
revised Proof of an equality involving $\phi(n)$
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Aug
11
revised Uniqueness proof for a certain functional equation
added 33 characters in body
Aug
8
revised How to represent the ceiling function using mathematical notation?
edited tags
Aug
8
revised How to check if an object is on the line of fire?
edited body
Aug
7
revised Find polynomial whose root is sum of roots of other polynomials
added 859 characters in body
Aug
7
revised How to pick a random sample of given size from a set of unknown size
added 2 characters in body; edited title
Aug
7
revised Can I show these questions (is a set open or closed WRT metric) a faster way?
added 28 characters in body
Aug
7
revised Qualifier problem: Completeness of Metric Spaces
added 1 character in body
Aug
7
revised Relative orders of an element with respect to a subgroup
human OCR
Aug
6
revised Poker probability question [Texas hold'em]: Do chances to get a certain hand with the flop decrease with number of opponents?
edited tags; edited title
Aug
6
revised Poker probability question [Texas hold'em]: Do chances to get a certain hand with the flop decrease with number of opponents?
edited body
Aug
6
revised Find coefficients of a quadratic by tow points and mimimum value [Monbukagakusho exam 2010]
added 18 characters in body; edited title
Aug
6
revised How can vectors with different units (position, speed, …) “share” the same space?
added 34 characters in body; edited title
Aug
6
revised Let $V$ be a vector space, $W$ a supspace. Can we conclude that $W\oplus (V/W)$ and $V$ are isomorphic?
added 2 characters in body