## Links

Most of my recent preprints can be downloaded from the international preprint server http://arXiv.org/find/math

I am participating in the DFG-Forschungsschwerpunkt SPP 1489 on "Algorithmic and Experimental Methods in Algebra, Geometry and Number Theory".

I am participating in the SFB-TRR 195 on "Symbolic Tools in Mathematics and their Application".

Computer Algebra Systems

Macaulay 2 is a software system devoted to supporting research in algebraic geometry and commutative algebra. It is especially valuable to study syzygies.

Singular and CoCoA are alternative computer algebra packages for commutative algebra and algebraic geometry

Surf is a computer program to visualize real algebraic geometry.

Polyray is an alternative interaktive Computerprogram from France.

Online Mathematics

Eric Weisstein's world of mathematics

The MacTutor History of Mathematics archive

Interactive mathematics on the internet (France)

Mathematical organizations

Mathematical Research Institutes

Oberwolfach | MSRI | Mittag-Leffler Institute | Max-Planck-Institut Bonn |

Miscellaneous

Numberphile (Videos about Numbers and Stuff)