bio | website | regularize.wordpress.com |
---|---|---|
location | Braunschweig, Germany | |
age | 36 | |
visits | member for | 4 years, 2 months |
seen | 58 mins ago | |
stats | profile views | 1,749 |
Professor at TU Braunschweig.
Area: Inverse problems, regularization theory, applied functional analysis, mathematical image processing.
Oct 14 |
comment |
What is the maximum diameter of $N$ steps of a random walk?
Thanks so far for the comments and references! I'll check them out. @Igor: Is this also called Brownian motion if it is time discrete? Would it be right to say that the time discrete model is a sampled continuous Brownian motion? Sorry for my ignorance on this topic... |
Oct 13 |
asked | What is the maximum diameter of $N$ steps of a random walk? |
Oct 12 |
comment |
Best Poincare constants on the surface of a ball
Are there any such maps $\xi$ in the case of $\mathbb{R}^2$ which are in $H^1$? |
Oct 7 |
comment |
Fast root finding for strictly decreasing function
How fast? Is the derivative available? What is wrong with bisection? |
Sep 30 |
awarded | Yearling |
Sep 26 |
comment |
One-line proof of the Euler's reflection formula
Could a down-to-earth proof have one line? |
Sep 20 |
comment |
Do you know this form of an uncertainty principle?
I got a little bit confused with all these different inequalities around (many of them called Caffarelli-Kohn-Nirenberg) but now I see. That's an interesting relation though. The Heisenberg uncertainty is also included? ($\gamma=\alpha=0$, $\beta=−1$, $a=1/2$) |
Sep 20 |
comment |
Do you know this form of an uncertainty principle?
Wow, there are lot of constants involved. As far as I've seen, it seems that the case $\gamma=0$, $a=1$ and $\alpha=-1$ is not included? |
Sep 20 |
asked | Do you know this form of an uncertainty principle? |
Sep 19 |
comment |
Decomposing max-convolution of sum of functions ?
Sorry, I do not get several points: What are $x$, $y$, $dx$ and $dy$? What are the $d_i$'s? What do you mean by "random" matrices (especially in the light that they seem to depend on $x$ and $y$)? |
Sep 12 |
comment |
Unique limits of sequences plus what implies Hausdorff?
Thanks! Especially the topospaces.subwiki.org is pretty cool... |
Sep 7 |
revised |
When does symmetry in an optimization problem imply that all variables are equal at optimality?
Corrected wording |
Sep 7 |
comment |
Unique limits of sequences plus what implies Hausdorff?
I'm a bit confused. The Wikipedia page says that Frechet spaces are indeed Hausdorff. Also: Why do you have unique limits of sequences in the cocountable topology? |
Sep 7 |
revised |
Unique limits of sequences plus what implies Hausdorff?
Corrected link |
Sep 7 |
accepted | Unique limits of sequences plus what implies Hausdorff? |
Sep 7 |
comment |
Unique limits of sequences plus what implies Hausdorff?
Thanks! To clarify: First countable + non-Hausdorff implies "non-unique limits" and hence, "unique limits" + first countable implies Hausdorff, right? |
Sep 7 |
asked | Unique limits of sequences plus what implies Hausdorff? |
Sep 7 |
comment |
Mathematical habits of thought and action which would be of use to non-mathematicians
I guess that this technique is widely known in management under the name ""scenario technique"... |
Aug 29 |
awarded | Nice Answer |
Jul 23 |
comment |
Dual operators between Hilbert spaces : With or without riesz representation
I use the notion "dual" for the first one and "Hilbert space dual" for the second one... |