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Apr
7
comment Why weren't continuous functions defined as Darboux functions?
Why can't $x^3\sin (1/x)$ be drawn?
Mar
10
awarded  Autobiographer
Feb
3
awarded  Yearling
Dec
29
awarded  Scholar
Dec
29
accepted Can this series be expressed in closed form, and if so, what is it?
Oct
21
comment Alternative ways to show $\int_{0}^{\infty}f(x)\, dx = \int_{0}^{1}f^{-1}(y)\, dy$
@tattwamasiamrutam I know that $f(0)=1$ because OP said so. That implies $f^{-1}(1)=0$. I assume that $f(\infty)=0$ because otherwise the integral of $f(x)$ wouldn't converge very easily. So if our integral is relatively sane, we can also assume that $f^{-1}(0)=\infty$ :)
Jan
27
comment An example of a problem which is difficult but is made easier when a diagram is drawn
Can you post the diagram?
Jan
13
comment Why does notation for functions seem to be abused and ambiguous?
@KCd Oh he knows what's going on. I think he is just venting.
Dec
25
comment What do bitwise operators look like in 3d?
Woah. 15char...
May
17
comment Nuking the Mosquito — ridiculously complicated ways to achieve very simple results
Huh, this is how I would solve it.
May
17
comment Nuking the Mosquito — ridiculously complicated ways to achieve very simple results
I wonder if any of them tried imagining the square. The official solution is fairly amusing :)
May
17
comment Nuking the Mosquito — ridiculously complicated ways to achieve very simple results
Isn't this true for all integrals? (not just integration by parts)
May
17
comment What is the most fundamental trigonometric function: cosine or sine?
Agreed. (Though I am biased towards $\cos(x)$ because of the Discrete Cosine Transform)
May
9
comment Hanging a picture on the wall using two nails in such a way that removing any nail makes the picture fall down
Ah, slots beside the nails. I knew there would be an easy solution ;)
May
9
comment Is there an identity for cos(ab)?
It does not have to be an integer: math.stackexchange.com/a/787186/12438
May
9
comment Is there an identity for cos(ab)?
@ColeJohnson There is a formula if $a$ is any integer.
May
8
answered Is there an identity for cos(ab)?
Apr
10
comment Visually deceptive “proofs” which are mathematically wrong
-_- Now that's just silly.
Apr
8
comment Visually deceptive “proofs” which are mathematically wrong
@Oliver They are not being serious, right?
Mar
20
comment How does the exponent of a function effect the result?
What are you smoking? $x^\frac{m}{n}$ is perfectly defined!