bio | website | regularize.wordpress.com |
---|---|---|
location | Braunschweig, Germany | |
age | 36 | |
visits | member for | 4 years, 10 months |
seen | Jul 29 at 8:47 | |
stats | profile views | 1,991 |
Professor at TU Braunschweig.
Area: Inverse problems, regularization theory, applied functional analysis, mathematical image processing.
May 6 |
answered | Examples of common false beliefs in mathematics |
Apr 24 |
reviewed | Approve Embedding Theorem for topological spaces, and in general |
Apr 23 |
comment |
l1 Quadratic Programming
Noting that the above problem has all these guys as variables: Isn't that in standard for already? |
Apr 23 |
comment |
A question involving Mazur's Lemma
Well, the degenerate case $y_n = x_n$ does not work so some assumption on the convex combination is needed. |
Apr 21 |
reviewed | Reopen Decomposition space of $\mathbb{C}$ by concentric circles |
Apr 20 |
awarded | Good Answer |
Apr 14 |
revised |
Is there a classification of 2d extended TQFTs with defects?
spelled out TQFT and added link |
Apr 14 |
comment |
2, 3, and 4 (a possible fixed point result ?)
As far as I understood, the BGK (Browder-Göhde/Göbel-Kirk) fixed point theorem states that every non-expansive self-mapping on a non-empty, closed and convex subset of a uniformly convex Banach space has a fixed point. |
Apr 7 |
awarded | Necromancer |
Mar 27 |
comment |
Hadamard / matrix product adjoint
Ok, I see now. I think a better fit for this question would be scicomp.stackexchange.com. Anyway: The adjoint is defined by $\langle A^* y,x\rangle = \langle y,Ax\rangle$. You do adjoints one by one from outside to inside. |
Mar 26 |
comment |
Hadamard / matrix product adjoint
Sorry, but this does not make sense. What is the Hadamard product of the matrix S and the vector Fx? |
Mar 26 |
comment |
Hadamard / matrix product adjoint
Err... So x is a matrix? |
Mar 26 |
comment |
Hadamard / matrix product adjoint
I could not parse your definition of the operator A. If D and S are matrices, do you build the Hadamard product with the matrix of the Fourier transform? |
Mar 26 |
comment |
Convergence in energy of bounded (semi)subharmonic functions
Sorry for the late reply: I guess the best thing would be to write an answer yourself so that this is kept for the records. |
Mar 26 |
reviewed | Approve Are all rational exactly solvable differential equations known? |
Mar 24 |
awarded | Nice Answer |
Mar 24 |
reviewed | Leave Open Which way for reading the proofs? |
Mar 24 |
answered | Which way for reading the proofs? |
Mar 23 |
reviewed | Leave Closed If a polynomial $p(z)$ omits a value, then $p(z)-\dfrac{(1-e^{i\psi})}{n}zp^{\prime}(z)$ also omits that value |
Mar 23 |
reviewed | Leave Open Analysis of Sobolev spaces |