I am a Senior Lecturer at the University of Hamburg. Most of my work is in Set Theory of the reals and Boolean algebras. I am also interested in Discrete Math.
44 What's a magical theorem in logic? Aug 30 '11
28 Arguments against large cardinals Oct 29 '10
28 The sets in mathematical logic Apr 24 '11
27 Interpretation of the Second Incompleteness Theorem Sep 9 '10
24 Proof that no differentiable space-filling curve exists Mar 30 '15
23 Is there a measure zero set which isn't meagre? Oct 25 '10
21 Axiom of Choice: Ultrafilter vs. Vitali set Jul 6 '11