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location Buenos Aires, Argentina
age 21
visits member for 4 years, 2 months
seen 4 hours ago

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Dec
15
comment How to calculate$ \int_0^{\infty} e^{-x^2} \sin x dx$ in the most simple way
@Lucian: My comment is not as useful as I thought it would be. It would work if the limits were $\pm \infty$ (of course, the integral would be zero), but it doesn't work here because after completing the square, the limits of integration are not simple. It does let you get to the Dawson function quickly, but I thought you could get a closed form solution.
Dec
15
comment How to calculate$ \int_0^{\infty} e^{-x^2} \sin x dx$ in the most simple way
Use $\sin x = (e^{ix}-e^{-ix})/2$.
Dec
13
awarded  Nice Question
Nov
25
reviewed Approve Consider the following limit: $\lim_{n \to \infty } \frac{\ln(1+n)-\ln(n^{2})}{\sin(1/n)}$
Nov
13
accepted Does the matrix exponential take open sets into open sets?
Nov
13
comment Does the matrix exponential take open sets into open sets?
@m.g.: Well, that was simple. You should post that as an answer.
Nov
13
comment Does the matrix exponential take open sets into open sets?
@Jack: what about $x^2$ on $(-1,1)$?
Nov
13
asked Does the matrix exponential take open sets into open sets?
Nov
6
awarded  Nice Question
Oct
24
awarded  Yearling
Oct
23
awarded  Notable Question
Oct
8
comment How do I take the limit of this function?
You must be doing something wrong: when I put in $2.1$, $2.01$, $2.001$, I get $15$, $150$, $1500$, etc.
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Aug
24
accepted Where does the right hand rule appear in the “tensor” definition of the cross product?
Aug
24
asked Where does the right hand rule appear in the “tensor” definition of the cross product?
Jul
24
answered Confusion about Spherical Coordinates Transformation
Jul
15
reviewed Edit nth term derivative with f(0) plugged in
Jul
15
revised nth term derivative with f(0) plugged in
Improved formatting
Jul
2
awarded  Curious