200 reputation
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location Germany
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visits member for 2 years, 5 months
seen Jul 12 at 20:49

Jul
2
awarded  Curious
May
9
comment Proof: Force always perpendicular and motion in a plane implies that the trajectory is a circle
@DanielV No I mean that the force which corresponds to $x''$ and $x'$ which corresponds to the velocity are perpendicular.
May
9
revised Proof: Force always perpendicular and motion in a plane implies that the trajectory is a circle
added 144 characters in body
May
9
asked Proof: Force always perpendicular and motion in a plane implies that the trajectory is a circle
Mar
22
asked Comic that makes clear that it might be a good idea to prove something…
Mar
15
comment Real world applications of exponential function; continous case
Well that's clear. The point is just that I cannot assume that students are familiar with $\mathrm{e}$.
Mar
15
comment Real world applications of exponential function; continous case
@mookid Yes but thats for the case $b < 1$, it's a decay. I know there are many interesting (quasi-)continous examples with $b < 1$, but I didn't know any really interesting examples for $b > 1$ which are not discrete.
Mar
15
asked Real world applications of exponential function; continous case
Oct
5
asked Visual proof ot the distributive property in $\mathbb{Z}$
Sep
29
awarded  Tumbleweed
Sep
22
asked Historical origin of the notation P(x|y) for points in elementary geometry
Sep
11
awarded  Popular Question
Mar
25
accepted Necessary and sufficient conditions that the difference of two quadratic equations has no solutions in $\mathbb{N}$
Mar
24
asked Necessary and sufficient conditions that the difference of two quadratic equations has no solutions in $\mathbb{N}$
Sep
21
accepted General definition of growth in mathematics
Sep
21
awarded  Supporter
Sep
21
comment Reference for similarity tests for triangles
Thanks for nice link! However it would be better to have a book as a reference since I want to cite it. By the way the link is about congruence, my question was about similarity.
Sep
21
asked Reference for similarity tests for triangles
Sep
21
awarded  Scholar
Sep
21
accepted Large numbers in real world