3,453 reputation
1551
bio website regularize.wordpress.com
location Braunschweig, Germany
age 36
visits member for 4 years, 6 months
seen Mar 29 at 17:30

Professor at TU Braunschweig.

Area: Inverse problems, regularization theory, applied functional analysis, mathematical image processing.


Jul
9
comment What functions can be obtained as a convolution of a Schwartz function and a tempered distribution?
Would you mind to show the argument?
Jul
9
answered Fiction books about mathematicians?
Jul
7
awarded  Organizer
Jul
7
comment $\ell_o$ Minimization (Minimizing the support of a vector)
Still a question remains: What is the aim of your reformulation? In other words: what is wrong with the $\ell^0$-minimization problem? As you have written: The problem is NP-hard and hence, there will be no "easy" reformulation with out any further assumption on $A$ (unless $P=NP$).
Jul
7
revised reference for perturbation of projection result
edited tags
Jul
7
comment $\ell_o$ Minimization (Minimizing the support of a vector)
I am confused: Do you look for an exact reformulation or an LP relaxation?
Jul
5
comment Colloquial catchy statements encoding serious mathematics
Not an exact duplicate. Here its about optimization and not about finance.
Jun
14
comment Blackbox Theorems
Sounds reasonable; Feel free to edit.
Jun
13
answered Blackbox Theorems
Jun
4
revised In search of an early picture of Max Dehn
New picture added
Jun
2
awarded  Enlightened
Jun
1
awarded  Nice Answer
Jun
1
answered In search of an early picture of Max Dehn
May
31
awarded  Popular Question
May
30
revised When (if ever) disclose your identity as a reviewer?
Clarification and extended question.
May
30
comment When (if ever) disclose your identity as a reviewer?
@Timothy: Thanks for the clarification! Somehow it seems that I couldn't make it clear enough...
May
29
awarded  Nice Question
May
29
asked When (if ever) disclose your identity as a reviewer?
May
18
comment Way to memorize relations between the Sobolev spaces?
Isn't that the "DeVore-diagram"?
May
12
comment Does the minima of a sequence of convex convergent functions converge?
By the way: The proper notions for convergence of minimizers is Gamma convergence: en.wikipedia.org/wiki/%CE%93-convergence.