Holger Kammeyer

Dr. Holger Kammeyer

  • Karlsruher Institut für Technologie
    MATH | IAG | AG Topologie
    Englerstr. 2 | Mathebau (20.30)
    76131 Karlsruhe

 I am a postdoc in the topology group of the Institute for Algebra and Geometry at KIT. My mathematical interests range around algebraic topology, ℓ²-invariants and arithmetic groups. I am member of the Priority Program 2026 "Geometry at Infinity" and of the RTG 2229 "Asymptotic Invariants and Limits of Groups and Spaces". Here you can find slides of a talk on "The construction of the regular 65.537-gon with compass and straightedge" at the Day of Mathematics 2019 (in German).

Introduction to ℓ²-invariants

An up-to-date and user-friendly introduction to the rapidly developing field of ℓ²-invariants.

Springer Lectue Notes in Mathematics, Vol. 2247

Introduction to l2-invariants Springer 2019
Publications
Title Coauthors Journal

Caterina Campagnolo

Journal of Algebra,
Volume 579, (2021), 237-255

Acta Arithmetica,
197.3 (2021), 311-330

Steffen Kionke, Jean Raimbault, Roman Sauer

Forum of Mathematics, Sigma,
Vol. 8, (2020), 1–22

Roman Sauer

Groups, Geometry, and Dynamics,
14 (2020), no. 3, 857–869

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Springer Lecture Notes in Mathematics,
Vol. 2247 (2019), viii+181 pp.

Bull. Lond. Math. Soc.,

49-3 (2017), 428–442

Groups, Geometry, and Dynamics,

11-4 (2017), 1231–1251 

Wolfgang Lück, Henrik Rüping

Geometry & Topology,
20-3 (2016), 1275--1287

Algebraic & Geometric Topology,

14 (2014), 2475-2509

Journal of Lie Theory,

24, No. 2 (2014), 307-319 

Survey articles and publications in quantitative finance
Title Coauthors Journal

Jörg Kienitz

Wilmott Magazine, Issues 57, 58, 59, (Jan 2012, March 2012, May 2012), 46-53, 34-45, 44-49

Roman Sauer

to appear in Oberwolfach Snapshots of Modern Mathematics

Theses
Title Type, University

doctoral thesis, University of Göttingen

diploma thesis, University of Göttingen 

  

Winter term 2020/2021
Summer term 2020
Winter term 2019/2020

RG-Seminar "Topology" Thu 03:45-05:15 pm, SR 2.059 (20.30)

Summer term 2019
Winter term 2018/2019
Summer term 2018
Winter term 2017/2018
Summer term 2017
Winter term 2016/2017

No teaching due to scientific stay in Bonn. 

Summer term 2016
More Information on the lecture "Algebraic Topology" is given in the course announcement.
Winter term 2015/2016

More information on the lecture "L²-invariants" is given in the course announcement.

Summer term 2015
Since April 2015 Postdoc at Institute for Algebra and Geometry
(working with Roman Sauer)
Karlsruhe Institute of Technology
July 2013 - March 2015 Postdoc at Mathematical Institute
(working with Wolfgang Lück)
University of Bonn
July 2010 - May 2013 Doctoral studies at Mathematical Institute
(working with Thomas Schick)
University of Göttingen
August 2009 - June 2010 Fulbright scholar at Department of Mathematics University of California Berkeley
July 2008 - October 2008 Internship in team "Quantitative Analysis" Deutsche Postbank, Bonn
October 2004 - July 2009 Diploma studies in mathematics with minor theoretical physics University of Göttingen