3,453 reputation
1551
bio website regularize.wordpress.com
location Braunschweig, Germany
age 36
visits member for 4 years, 6 months
seen 41 mins ago

Professor at TU Braunschweig.

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


2d
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.
2d
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?
2d
comment Hadamard / matrix product adjoint
Err... So x is a matrix?
2d
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
26
reviewed Close Closed Form Solutions To Simple Iterated Polynomial Building Blocks
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
Mar
17
comment Fredholm integral with functions constrained to [0;1]
For some reason I confused $g$ and $f$. Of course $f$ should be the unknown… Corrected.
Mar
17
revised Fredholm integral with functions constrained to [0;1]
corrected variable names
Mar
16
comment Fredholm integral with functions constrained to [0;1]
The most simple thing that comes to mind is the projected gradient method, see my update.
Mar
16
revised Fredholm integral with functions constrained to [0;1]
added 361 characters in body
Mar
16
answered Fredholm integral with functions constrained to [0;1]
Mar
10
reviewed Leave Open More recently published comprehensive reference on inequalities in the spirit of Hardy-Littlewood-Pólya
Mar
6
awarded  Necromancer
Mar
6
revised Some questions about Invexity
Formatted as a link.