Dirk

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Name Dirk
Member for 2 years
Seen 20 hours ago
Website
Location Braunschweig, Germany
Age 34
Assistant professor at TU Braunschweig. Area: Inverse problems, regularization theory, applied functional analysis, mathematical image processing.
12

Questions
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When (if ever) disclose your identity as a reviewer?

may 31 at 8:29 PaPiro 1,346●1●9●26

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12
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Mathematical research inspired in fundamental part by mathoverflow

mar 4 12 at 20:58 GH 15.1k●1●33●55

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Does “taking the dual space” stabilize?

nov 16 10 at 9:11 Stefan Geschke 10.6k●1●14●37

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9
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1
answer
849
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Sarrus rules for 4 times 4

aug 28 at 2:49 Douglas Zare 13.2k●3●36●58

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6
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5
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386
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Metrization of weak convergence of signed measures

feb 4 at 8:35 Dirk 1,777●8●22

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116
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Lower semicontinuity of Bregman distances/divergences

nov 5 10 at 5:00 Dirk 1,777●8●22

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49

Answers
votes newest views recent
37
What are your favorite instructional counterexamples?
30
Proofs that require fundamentally new ways of thinking
21
In search of an early picture of Max Dehn
18
Titles composed entirely of math symbols
15
Elementary+Short+Useful
13
A sudden smiley? :-)
10
When does symmetry in an optimization problem imply that all variables are equal at optimality?
9
Applications of mathematics
7
New grand projects in contemporary math
6
How to solve a system of linear equations without storing the matrix?
6
Mathematical modeling of voting/rating (e.g. political elections, questions on MO, gadgets on amazon,…)
5
Can we approximate an arbitrary function as a (probably infinite) sum of bell shapes?
5
Is the boundary $\partial S$ analogous to a derivative?
5
Refereeing a Paper
5
Modern developments in finite-dimensional linear algebra
5
“Wild” solutions of the heat equation: how to graph them?
4
ODE’s without a Lipschitz condition
4
Is there an integration free proof (or heuristic) that once differentiable implies twice differentiable for complex functions?
4
Non-computational software useful to mathematicians
4
How to do DFT for irregular sampling period ?
3
Fiction books about mathematicians?
3
Why do we want to have orthogonal bases in decompositions?
3
Some questions about Invexity
3
Range of the Radon Transform
3
Smoothing L1 norm, Huber vs Conjugate
3
Elaborating Mercer’s theorem (RKHS) on Cameron-Martin space $k(x,y)=\min(x,y)$
2
Why is Set, and not Rel, so ubiquitous in mathematics?
2
Generalized notions of solutions in various areas of mathematics
2
The metric space associated to a measure space
2
Recovering a matrix instead of a vector
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