3,553 reputation
12051
bio website regularize.wordpress.com
location Braunschweig, Germany
age 36
visits member for 4 years, 10 months
seen 2 days ago

Professor at TU Braunschweig.

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


2d
awarded  Notable Question
Jul
24
comment How to calculate $det(X^TX)$ efficiently, update one column of X each time
Not a good fit for this side - I suggest scicomp.stackexchange.com. Anyway: Why not do a factorization of $X_1$ (LU or QR) and down- and update that?
Jul
24
comment 9-point stencil “equivalent” for advection equation
This question should go well on scicomp.stackexchange.com.
Jul
17
comment question about $TGV^2$ space
Added something on the interpretation with Radon measures…
Jul
17
revised question about $TGV^2$ space
added 456 characters in body
Jul
17
answered question about $TGV^2$ space
Jul
17
comment Is this has anything to do with Riesz representation?
Nope, not linear since flipping the sign of my won't flip the sign of the value.
Jul
17
comment Is this has anything to do with Riesz representation?
One more thing: Your functional is not linear but only positively homogeneous, so what kind of result do you expect?
Jul
17
comment Is this has anything to do with Riesz representation?
What form of Sobolev norm are you using, i. e. how are the sup-norm of the function and it's derivative combined?
Jul
2
awarded  Necromancer
Jun
29
answered Discretizing probability measures
Jun
13
awarded  Populist
May
22
reviewed Close Searching for $C^*$
May
20
comment Projecting a convex partition onto a convex set
Err, sorry - of course, nonempty $X$ it should be…
May
20
comment Projecting a convex partition onto a convex set
$X$ could be empty or have $n-1$ points... You need some more conditions.
May
19
comment Splines linearly independent
What do you mean by "its unique smooth extension"?
May
14
comment Which way for reading the proofs?
@fanzheng I heard a similar quote about a famous optimizer "I don't read papers, I write them."
May
13
answered Rate of convergence for cyclic gradient descent
May
12
awarded  Necromancer
May
12
reviewed Close Can the image of a disk have nontrivial Hausdorff measure for $1 < d < 2$?