| I hail from
My research interests lie between mathematics and computer science.
I am mainly interested in proving lower bounds on computational complexity of concrete problems.
Most of my papers are available on-line.
My collection of links.
I have also written several books, the last one with Igor Sergeev. Click on the images to visit their home pages:
What interesting happened during my stay in Frankfurt:
Ben Rossman's visit (2013)
Mario Szegedy's visit (2010)
Sasha Razborov's visit (2002)
my student, Matthias Krieger, has written an interesting paper on monotone circuits.
I serve on editorial teams of:
Lithuanian Mathematical Journal
Electronic Colloquium on Computational Complexity
My work is/was supported by:
Institut für Informatik,
Lst. Theoretische Informatik,
Postfach 11 19 32,
D-60054 Frankfurt am Main
Please do NOT use my old address "email@example.com ..." to reliably reach me (too much spam there).