I am Junior Professor for String Geometry in the Algebra and Number Theory group at the Department of Mathematics, of Universität Hamburg. I am also a member of the "Cluster of Excellence" Quantum Universe.

Before that I was a College Associate Lecturer and Fellow of St John's College, affiliated with the University of Cambridge, a Senior Research Associate at Lancaster University, a Postdoctoral Fellow at the Max Planck Institute for Mathematics in Bonn and a College Lecturer and Fellow of Christ's College.


Julian Holstein
Fachbereich Mathematik
Bundesstrasse 55
20146 Hamburg

Room 336, Geomatikum

Email: julian.holstein,


My research interests lie at the intersection of algebraic geometry and algebraic topology with higher category theory and homotopical algebra.

If you are interested in doing a PhD with me, or working with me as a Masters student or postdoc, send me an email!

Here is a list of my papers and preprints in reverese chronological order:

The paper title links to the arxiv, the journal title links to the published versions; there are no differences in content.

The last three papers are based on my PhD thesis Morita Cohomology. My advisor was Ian Grojnowski.


In Wintersemester 2019/20 I am teaching Topologie (Bachelor) at Universität Hamburg.

In Lent Term 2015 I was lecturing a Part III course, Homological and Homotopical Algebra at University of Cambridge.


My mother is Susannne Holstein, she is an artist.