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seen Jul 23 at 0:48

Jan
22
comment Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
@AsafKaragila, thanks!
Jan
22
revised Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
edit in response to follow up question
Jan
22
revised Derivative for log
improved formatting, capitalization
Jan
22
suggested suggested edit on Derivative for log
Jan
22
awarded  Editor
Jan
22
revised Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
added more info relevant to the question
Jan
22
revised Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
improved formatting
Jan
22
answered Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
Jan
22
suggested suggested edit on Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle
Jan
16
awarded  Yearling
Jan
10
accepted Defining the determinant of linear transformations as multilinear alternating form
Jan
3
accepted Is there a geometric argument that the Legendre transform of a convex function is convex?
Oct
7
asked Is there a geometric argument that the Legendre transform of a convex function is convex?
Sep
1
comment Is there a simple way to bound this contour integral?
Thanks for your comment. I realized that I was having a hard time phrasing my question. Now that I think about it, I wanted to be able to get a sharper estimation - I wanted to be able to get a feel for how $\int e^{-R^2 \cos2\theta} R \, d\theta$ behaves for large values of $R$ (even though to evaluate the original integral, we just needed to show this was $o(1)$). But like you said, this estimation isn't too bad. How did you get that estimate of yours?
Sep
1
comment Bounding a function by its second derivative using Fourier series
I am sorry, but I am confused. I am asking if there is a way to bound a function by its second derivative with Fourier series, not when a function has a Fourier series.
Sep
1
asked Is there a simple way to bound this contour integral?
Aug
29
accepted Proving the mean value property of harmonic functions using distributions?
Aug
29
asked Bounding a function by its second derivative using Fourier series
Aug
18
answered How to show that e.g. $\cos(z)$ is analytic using Cauchy- Riemann differential equations?
Aug
9
comment Proving the mean value property of harmonic functions using distributions?
Thank you! This was really easy to follow! One question I have is: how do we generalize this argument to higher dimensions? I know the radial component of $\Delta \phi$ will be $\phi_{rr}+\frac{n-1}{r}\phi_r$, but why is the integral of the remaining part zero?