My research concerns various aspects of homotopy theory, and I am particularly interested in questions relating to (parametrized) higher category theory, (global) equivariant homotopy theory, algebraic K-theory, and the interactions between these subjects.

Publications and preprints

1. Revisiting (∞, 2)-naturality of the Yoneda embedding
   preprint, 5 pages
   arXiv:2508.11526

2. Mackey functors and classical equivariant K-theory
   preprint, 27 pages
   arXiv:2508.11525

3. Universality of span 2-categories and the construction of 6-functor formalisms
   joint with Bastiaan Cnossen and Sil Linskens
   preprint, 57 pages
   arXiv:2505.19192

4. Norms in equivariant homotopy theory
   joint with Sil Linskens and Phil Pützstück
   preprint, 105 pages
   arXiv:2503.02839

5. Universality of Barwick’s unfurling construction
   joint with Bastiaan Cnossen and Maxime Ramzi
   preprint, 15 pages
   arXiv:2502.18278

6. Normed equivariant ring spectra and higher Tambara functors
   joint with Bastiaan Cnossen, Rune Haugseng, and Sil Linskens
   preprint, 64 pages
   arXiv:2407.08399

7. Parametrized (higher) semiadditivity and the universality of spans
   joint with Bastiaan Cnossen and Sil Linskens
   preprint, 77 pages
   arXiv:2403.07676

8. Homotopical commutative rings and bispans
   joint with Bastiaan Cnossen, Rune Haugseng, and Sil Linskens
   J. Lond. Math. Soc. 111 No. 6 (2025), ID e70200, 33 pages
   published version   arXiv version (arXiv:2403.06911)

9. The Adams isomorphism revisited
   joint with Bastiaan Cnossen and Sil Linskens
   Math. Z. 308 No. 2 (2024), Paper No. 33, 32 pages
   published version   arXiv version (arXiv:2311.04884)

10. Simplicial *-modules and mild actions
    joint with Anna Marie Schröter
    Homology Homotopy Appl. 26 No. 2 (2024), pp. 229–258
    published version   arXiv version (arXiv:2307.11002)

11. Partial parametrized presentability and the universal property of equivariant spectra
    joint with Bastiaan Cnossen and Sil Linskens
    Trans. Amer. Math. Soc. (to appear in print), 62 pages
    published version  arXiv version (arXiv:2307.11001)

12. Global model categories and topological André-Quillen cohomology
    joint with Michael Stahlhauer
    to appear in Trans. Amer. Math. Soc., 79 pages
    arXiv:2302.06207

13. Parametrized stability and the universal property of global spectra
    joint with Bastiaan Cnossen and Sil Linskens
    preprint, 110 pages
    arXiv:2301.08240

14. Genuine versus naïve symmetric monoidal G-categories
    Doc. Math. 28 No. 5 (2023), pp. 1079–1161
    published version   arXiv version (arXiv:2203.02277)

15. Global homotopy theory via spectral Mackey functors
    preprint, 28 pages
    arXiv:2202.07272

16. Categorical models of unstable G-global homotopy theory
    Cah. Topol. Géom. Différ. Catég. 64 No. 4 (2023), pp. 439–481
    published version   arXiv version (arXiv:2109.02067)

17. G-global homotopy theory and algebraic K-theory
    Mem. Amer. Math. Soc. 306 No. 1545 (2025), v + 246 pp.
    published version  arXiv version (arXiv:2012.12676)

18. On the global homotopy theory of symmetric monoidal categories
    New York J. Math. 29 (2023), pp. 635–686
    published version   arXiv version (arXiv:2009.07004)

19. Parsummable categories as a strictification of symmetric monoidal categories
    Theory Appl. Categ. 37 (2021), Paper No. 17, pp. 482–529
    published version   arXiv version (arXiv:2006.15068)

20. Homotopy (pre)derivators of cofibration categories and quasicategories
    Algebr. Geom. Topol. 18 No. 6 (2018), pp. 3601–3646
    published version  arXiv version (arXiv:1712.07845)

Teaching

Winter 2025/26

• Graduate seminar Higher Algebra
  with Stefan Schwede

• Assistant for lecture Algebraic Topology I (lecturer: Stefan Schwede)

Summer 2025

• Graduate seminar Lie Groups and Their Representations
  with Jack Davies

• Assistant for lecture Topology II (lecturer: Stefan Schwede)

• Bachelor thesis seminar
  joint with the rest of the topology group

Teaching in previous terms

Winter 2024/25

• Assistant for lecture Topology I (lecturer: Stefan Schwede)

• Assistant for lecture Einführung in die Algebra (lecturer: Gebhard Martin)

Fall 2023 (Utrecht)

• Lecture course Bewijzen in de Wiskunde (Proofs in Mathematics)
  with Johan Commelin, Mireia Martínez i Sellarès, Lennart Meier, Guido Terra-Bleeker, and Marieke van der Wegen

Summer 2022 (Bonn)

• Lecture course Selected Topics in Topology: Homotopy Coherent Algebraic Structures

• Seminar Topologische Anwendungen algebraischer K-Theorie (Applications of Algebraic K-Theory in Topology)
  with Stefan Schwede

Winter 2021/22 (Bonn)

• Graduate seminar Lie Groups and Their Representations
  with Stefan Schwede

• Assistant for the lecture Topology I (lecturer: Daniel Kasprowski)