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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!