Prof. Dr. Stefan Schwede

E-mail: schwede(at)
Phone: +49 228 73 3158
Room: 4.008
Location: Mathematics Center
Institute: Mathematical Institute
Research Area: Research Area A2

Academic Career


Dr. math., University of Bielefeld


Postdoc, University of Chicago, IL, USA

1997 - 1998

Postdoc, Massachusetts Institute of Technology, Cambridge, MA, USA

1998 - 2001

Assistant Professor (C1), University of Bielefeld


Habilitation, University of Bielefeld

2002 - 2003

Head of Junior Research Group, DFG Collaborative Research Center SFB 478 “Geometric structures in mathematics”, University of Münster

Since 2003

Professor (C4), University of Bonn

Research Profile

My main area of expertise is algebraic topology, specifically stable homotopy theory. I contributed to the foundations of stable homotopy theory (comparison of models for the stable homotopy category, rigidity theorem for the stable homotopy category, foundations of the theory of symmetric spectra). Further research concerned basic questions about triangulated categories, in particular the existence and uniqueness of models for triangulated categories, the distinction of algebraic and topological triangulated categories and examples of exotic triangulated categories.

Much of my current and future research is in equivariant stable homotopy theory, in particular ''global'' phenomena, i.e., spaces or spectra with simultaneous and compatible actions of all compact Lie groups, up to deformations that preserve all symmetries. I introduced a framework for global equivariant homotopy theory based on orthogonal spectra which opens the door for a rigorous study of global stable homotopy types. The global perspective reveals systematic patterns and facilitates equivariant calculations, for example in the rank filtrations of equivariant infinite symmetric products or global equivariant K-theory.
Future goals include a better understanding of the universal properties of global K-theory (both algebraic and topological) and global equivariant bordism. Alongside, we want to further exploit naturally occuring global structures for new computations.

Research Projects and Activities

DFG Research Training Group GRK 1150 “Homotopy and Cohomology”
Scientific Member

DFG Priority Program SPP 1786 “Homotopy Theory and Algebraic Geometry”

Series of Oberwolfach Workshops on “Homotopy theory” (2007, 2011, 2015)

Abel Symposion, 2007

HIM-Trimester, 2015

Semester program “Homotopy Harnessing Higher Structures” at Isaac Newton Institute, 2018

“Bonn International Graduate School of Mathematics”
Director, 2013 - 2017

DFG Cluster of Excellence “Hausdorff Center for Mathematics”
Vice-Coordinator (2017 - 2019) and Principal Investigator

Publication List

MathSciNet Publication List (external link)

ArXiv Preprint List (external link)


• Documenta Mathematica (2003 - 2016)
• Mathematische Zeitschrift (2006 - 2012)
• Geometry & Topology (since 2016)



Fellow of the American Mathematical Society

Selected Invited Lectures


Plenary talk, Joint International Meeting UMI - DMV, Perugia, Italy


Plenary talk, European Mathematical Society -- Joint Mathematical Weekend, Copenhagen, Denmark


Christian Ausoni (2008), now Professor, University of Paris 13, France

Gerald Gaudens (2010)

Steffen Sagave (2013), now Assistant Professor, Radboud University Nijmegen, Netherlands

Selected PhD students

Steffen Sagave (2006): “Universal Toda Brackets of Ring Spectra”,
now Assistant Professor, Radboud University Nijmegen, Netherlands

Constanze Roitzheim (2007): “Rigidity and Exotic Models for the K-local Stable Homotopy Category”,
now Senior Lecturer, University of Kent, England, UK

Morith Rahn (née Groth) (2011): "On the theory of derivators",
now Akademischer Rat, University of Mainz

Lennart Meier (2012): “United elliptic homology”,
now Assistant Professor, Utrecht University, Netherlands

Irakli Patchkoria (2013): “Rigidity in equivariant stable homotopy theory”,
now Lecturer, University of Aberdeen

Karol Szumilo (2014): “Two models for the homotopy theory of cocomplete homotopy theories”,
now Postdoc, University of Leeds

Markus Hausmann (2016): “Symmetric products, subgroup lattices and filtrations of global K-theory”,
now Postdoc, University of Bonn

Supervised Theses

  • Master theses: 19, currently 1
  • Diplom theses: 15
  • PhD theses: 14, currently 2
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