20,482 reputation
31747
bio website maths.lth.se/matematiklth/…
location Lund, Sweden
age 42
visits member for 3 years
seen 5 hours ago

Associate professor, Lund University. Research interests: several complex variables, in particular pluripotential theory.


20h
comment Which entire functions satisfy $\,\lvert\,f(z)\rvert \leq \lvert z\rvert^k$?
possible duplicate of Entire function bounded by a polynomial is a polynomial
1d
revised Velocity Vector Parallel To xy Plane
edited tags
1d
comment Velocity Vector Parallel To xy Plane
several-complex-variables, really?
1d
comment Integration problem
What on earth is "integration in physics"?
Nov
25
comment $f^{-1}(w)$ is finite $\forall w \in \Bbb C \Rightarrow f$ is a polynomial.
Both questions are frequent duplicates. For i) see this for example. For ii) this. (Besides, the <in ii) should almost certainly be )
Nov
24
comment Why do we have trigonometric functions besides $\sin(x)$?
You shouldn't underestimate the value of convenience. Good choice of notation is almost a necessity for a field of mathematics to thrive. In this particular case, there are also historical reasons for the abundance of trigonometric functions.
Nov
23
answered Need help with problems in complex analysis about analyticity
Nov
20
revised What is wrong with the following argument?
edited tags
Nov
19
comment Are $z^n$ and $p(z)/|p(z)|$ homotopic?
A complex polynomial with no zeros of degree $n$?? Please give us an example of such a thing.
Nov
19
comment Complex functions with Property
What kind of answers are you looking for? It's clear that all three functions are non-linear, but homogeneous (of degrees $-1$, $0$ and $0$, respectively).
Nov
19
comment Spivak proof for limits, rigorous, difficult.
You need to prove that if it is true that $\lim_{x\to a} f(x) = L$ then it is also true that $\lim_{x\to a} [f(x) - L] = 0$ and vice versa.
Nov
19
revised When is a path integrals just “ordinary integration”?
added 185 characters in body
Nov
19
answered Cardinal Arithmetic
Nov
19
answered When is a path integrals just “ordinary integration”?
Nov
19
answered Locally vs uniformly bounded in Montel's theorem
Nov
18
revised Reference for “Approximation of identity” of a convolution
Spelling of Hörmander
Nov
18
revised Reference for “Approximation of identity” of a convolution
Spelling of Hörmander
Nov
18
comment Determine $\lim_{n\to\infty}A^{n}$
Or just A^100. (A lot less typing than repeated multiplication.)
Nov
17
answered How to compute $(e^x -1)/x$ when $-10^{-8}<x<10^{-8}$
Nov
17
comment Prove that $N_2(\mathbf z)=(\sum_{k=1}^n \overline {z_k}z_k)^{1/2}$ is a norm on $\mathbb C^n$
\parallel and \mid give the wrong spacing: Better is \| and | (or \lvert and \rvert instead of |)