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Aug
27
suggested rejected edit on Prove $ \sqrt{\arctan(x)} = (1/2) \arccos((1-x)/(1+x))$
Aug
27
comment Prove $ \sqrt{\arctan(x)} = (1/2) \arccos((1-x)/(1+x))$
This statement is not true: Sqrt[ArcTan[x]] === 1/2 ArcCos[(1 - x)/(1 + x)] --> False. Can anybody check if my TeX-ification is correct?
Aug
27
comment Prove $ \sqrt{\arctan(x)} = (1/2) \arccos((1-x)/(1+x))$
This looks like a math problem, nothing to do with Mathematica. Migrate?
Aug
25
awarded  Good Question
Aug
7
awarded  Yearling
Jul
7
accepted What requirements should a CRC polynomial satisfy?
Jul
4
answered How to find the equation of a line tangent to a function
Jul
4
comment If a function is uniformly continuous on $(-\infty,-1]$ and $[-1,\infty)$ is it uniformly continuous on $\mathbb{R}$
@Lierre - I don't think it's a typo. It would be silly to leave out ]-1,1[ and conclude that it's uniformly continuous over $\mathbb{R}$. -1 and -1 mentioned 3 times in the question, and that's also how Henning in the accepted answer interpreted it. I therefore rolled back your edit.
Jul
4
suggested rejected edit on If a function is uniformly continuous on $(-\infty,-1]$ and $[-1,\infty)$ is it uniformly continuous on $\mathbb{R}$
Jul
4
comment If a function is uniformly continuous on $(-\infty,-1]$ and $[-1,\infty)$ is it uniformly continuous on $\mathbb{R}$
@Lierre - the question is about -1 as endpoints of both intervals, not -1 and 1.
Jul
4
comment If a function is uniformly continuous on $(-\infty,-1]$ and $[-1,\infty)$ is it uniformly continuous on $\mathbb{R}$
I don't agree. Your argument would be valid if the intervals were half-closed, but both are closed, so the union is uniformly continuous.
Jul
2
comment What is the most frequent number of edges of Voronoi cells of a large set of random points?
Not a useful answer if all you get to see is a table of contents.
Jun
28
awarded  Popular Question
Jun
20
revised Homework help with projectile motion
added 6 characters in body
Jun
20
answered Homework help with projectile motion
Jun
20
answered Sanity check, is $\{(-9,-3),(2,-1),(7,7),(-1,-1)\}$ a function?
Jun
11
comment How do I scale 3 fractions to 3 natural numbers?
Second question: now that I see it, it seems obvious. I just couldn't see how to take $a$ and $b$ apart. Thanks.
Jun
11
comment How do I scale 3 fractions to 3 natural numbers?
I saw that, but misinterpreted. Sorry about that.
Jun
11
comment How do I scale 3 fractions to 3 natural numbers?
Ah, the $x$, $y$ and $z$ are not my natural number result then? Because if they were, their $\gcd$ would also be natural.
Jun
11
comment How do I scale 3 fractions to 3 natural numbers?
"and that r is maximal rational number". Is $r$ rational, or natural?