Merlin Christ

christ (at) uni-bonn (dot) de
Office: 1004
Mathematisches Institut
Endenicher Allee 60
53115 Bonn, Germany

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©Universität Bonn/Bernadett Yehdou

Bio

I am a Professor (Bonn Junior Fellow, temporary W2) in the Mathematical Institute at the University of Bonn.
Previously, I was a postdoc at the Institut de Mathématiques de Jussieu - Paris Rive Gauche (IMJ-PRG) with mentorship by Bernhard Keller.
Before that, I obtained my Ph.D. from the University of Hamburg under the supervision of Tobias Dyckerhoff.

Research interests

Higher category theory, representation theory, noncommutative algebraic geometry.

Upcoming and recent activities

Notes for my talk Perverse schobers for exceptional collections III on January 14th in Bonn can be found here.

Summer school on Perverse Sheaves and their Categorification in Geometry and Representation Theory in Venice (Link). 13-17 July 2026.
I will give a mini-course with the title "Introduction to perverse schobers".

Masterclass on Interactions between homotopy theory and representation theory in Copenhagen (Link). 10-14 November 2025.
I gave a mini-course with the title "A gentle introduction to sheaves of stable ∞-categories". Lecture notes

Publications and preprints

  1. Cluster theory of topological Fukaya categories. Part II: Higher Teichmüller theory
    Preprint: arxiv:2510.05925.
  2. Induction in perverse schobers and cluster tilting theory
    Preprint: arxiv:2509.01689.
  3. ∞-categorical group quotients via skew group algebras
    Preprint: arxiv:2501.13666.
  4. Perverse schobers, stability conditions and quadratic differentials II: relative graded Brauer graph algebras
    (with Fabian Haiden and Yu Qiu)
    Preprint: arxiv:2407.00154. Submitted.
  5. Lax Addivity (with Tobias Dyckerhoff and Tashi Walde)
    Preprint: arxiv:2402.12251. To appear in Doc. Math.
  6. Relative Calabi-Yau structures and perverse schobers on surfaces
    Preprint: arXiv:2311.16597. To appear in J. Noncommut. Geom. Updated version.
  7. Perverse schobers, stability conditions and quadratic differentials I (with Fabian Haiden and Yu Qiu)
    Preprint: arxiv:2303.18249. Submitted. Updated version.
  8. Complexes of stable ∞-categories (with Tobias Dyckerhoff and Tashi Walde)
    Preprint: arxiv:2301.02606. Submitted.
  9. Cluster theory of topological Fukaya categories
    Preprint: arXiv:2209.06595. Submitted.
  10. Geometric models for the derived categories of Ginzburg algebras of n-angulated surfaces via local-to-global principles
    Preprint: arXiv:2107.10091. Submitted.
  11. Ginzburg algebras of triangulated surfaces and perverse schobers
    Forum Math. Sigma, 10:e8, 2022, doi:10.1017/fms.2022.1. arXiv:2101.01939.
  12. Spherical monadic adjunctions of stable infinity categories
    Int. Math. Res. Not. IMRN, 2023(15):13153–13213, 2022, doi:10.1093/imrn/rnac187. arXiv:2010.05294.