Holger Kammeyer

Holger Kammeyer is Assistant Professor of Algebra and Geometry at the University of Düsseldorf. His research interests include algebraic topology as well as arithmetic and profinite groups. A particular field of his expertise is the theory of ℓ2-invariants on which he has authored the textbook Introduction to ℓ2-invariants (Lecture Notes in Mathematics, Volume 2247, Springer).