114,089 reputation
7106211
bio website von-eitzen.de/math/tntrep.xml
location Bonn, Germany
age 48
visits member for 2 years, 1 month
seen 7 mins ago

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


Oct
18
awarded  Nice Answer
Oct
18
revised How to compute $ \prod_0^n( 1- { 2 \over (2+k)(3+k)}= $?
added 12 characters in body; edited title
Oct
18
answered How to evaluate $\lim_{x \to 0} ( \ln(1 - \sin x) + x)/x^2$ without using l'Hôpital?
Oct
18
revised How to evaluate $\lim_{x \to 0} ( \ln(1 - \sin x) + x)/x^2$ without using l'Hôpital?
deleted 3 characters in body
Oct
18
revised Two hundred balls into one hundred boxes
added 280 characters in body
Oct
18
answered Two hundred balls into one hundred boxes
Oct
18
comment Two hundred balls into one hundred boxes
You can only say "if there is a box with 1 ball, then there is no disjoint class of 99 balls".
Oct
18
revised Drawing a Right Triangle With Legs Not Parallel to x/y Axes?
added 273 characters in body
Oct
18
comment Drawing a Right Triangle With Legs Not Parallel to x/y Axes?
I just notice that my solution assumes that the "given side lengths" are integers. Are they? Or could also lengths like $a=3\sqrt 2$, $b=4\sqrt 2$, $c=5\sqrt 2$ be given?
Oct
18
answered Drawing a Right Triangle With Legs Not Parallel to x/y Axes?
Oct
18
comment Observation about SSA criteria.
.. which is also just a fancy way of saying that they add up to 180° if they are not equal; which is also immediate from the isosceley triangle $BCD$
Oct
18
revised Is this map surjective?
added 9 characters in body
Oct
18
answered Help in finding $\lim_{n\to \infty}\left ( \sum_{k=1}^{n} \frac{1}{\binom{n}{k} } \right )^n$.
Oct
18
answered The Fundamental Group - An explicit homotopy between $(f \circ g) \circ h$ and $f \circ (g \circ h)$
Oct
18
answered Is this map surjective?
Oct
18
answered How do I prove that $|z|^t$ is continuous?
Oct
18
comment Nearest factorial given a number.
What is en.wikipedia.org/wiki/McQ by the way?
Oct
18
comment Nearest factorial given a number.
Someting like unsigned lowfac(unsigned x) { unsigned n=1; while (x/=++n); return n-1; }
Oct
18
comment Is HHH a congurence criteria for triangles?
@DanShved "side side side", i.e. two triangles are congruent if their corresponding sides are equal
Oct
18
comment Observation about SSA criteria.
What is the following observation?