705 reputation
1513
bio website martin-ueding.de
location Germany
age
visits member for 3 years, 4 months
seen Jul 18 at 20:09

Oct
10
awarded  Popular Question
Aug
5
awarded  Yearling
Jul
2
awarded  Curious
May
30
comment Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$?
Ah, the inverse function theorem holds in general if it is invertible. Good to know!
May
30
accepted Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$?
May
29
revised Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$?
Add duplicate
May
29
asked Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$?
May
8
comment Two halls 6 and 9 meters perpendicularly intersect. Optimization
@user2171981 I guess you should be able to carry it around the corner.
May
8
asked Chain rule for tensor of family of tensor fields
Mar
21
comment Why do we require radians in calculus?
In Physics, radians are unitless, but sometimes still mentioned. Just like counts/s or something like that. I think it is good to make it explicit.
Feb
27
awarded  Good Question
Feb
3
asked Closed complex integral that does not vanish
Jan
21
accepted Residuals and an identity of the cotangent
Jan
21
comment Residuals and an identity of the cotangent
Okay, I think I got it now. The doubling relation implies that $h(2z)$ is the mean of the values at $z$ and $z+\pi/2$. Therefore, if $2z$ is on the circle, it cannot be the maximum, if $h$ is not a constant. See my solution.
Jan
21
comment Residuals and an identity of the cotangent
“principal part” is the “Hauptteil der Laurentreihe”? I will keep working on it, that is fair :-)
Jan
21
comment Residuals and an identity of the cotangent
For the first part, I think I will manage it. For the second part: Having same poles with same residue means that the difference will have no poles? This makes some sense. Being odd implies $\equiv 0$ once shown that it is constant, is fine too. However, how do I apply this doubling relation? I do not see that yet.
Jan
21
comment Residuals and an identity of the cotangent
@DanielFischer: Thanks, I fixed it.
Jan
21
revised Residuals and an identity of the cotangent
deleted 6 characters in body
Jan
21
asked Residuals and an identity of the cotangent
Jan
6
comment Integral using residue theorem
Sounds good, we will try it out.