Merlin Christ

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

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Bio

I am a Professor (Bonn Junior Fellow, temporary W2) at the Mathematical Institute at the University of Bonn.
I obtained my Ph.D. from the University of Hamburg under the supervision of Tobias Dyckerhoff in 2023. Afterwards, I was a postdoc at the Institut de Mathématiques de Jussieu - Paris Rive Gauche (IMJ-PRG) with mentorship by Bernhard Keller.
A short CV.

Research interests

Higher category theory, representation theory, noncommutative algebraic geometry.

Recent activities

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

Publications and preprints

  1. Categorical Lusztig cycles and weave schobers (with Roger Casals)
    Preprint: arxiv:2605.22440. Submitted.
  2. Lagrangian structures on the derived moduli of constructible sheaves (with Enrico Lampetti)
    Preprint: arxiv:2603.04983. Submitted.
  3. Cluster theory of topological Fukaya categories. Part II: Higher Teichmüller theory
    Preprint: arxiv:2510.05925.
  4. Induction in perverse schobers and cluster tilting theory
    Preprint: arxiv:2509.01689.
  5. ∞-categorical group quotients via skew group algebras
    Preprint: arxiv:2501.13666. Submitted. Updated version.
  6. Perverse schobers, stability conditions and quadratic differentials II: relative graded Brauer graph algebras
    (with Fabian Haiden and Yu Qiu)
    Sel. Math. New Ser. 32, 62 (2026). doi:10.1007/s00029-026-01170-w. arxiv:2407.00154.
  7. Lax Addivity (with Tobias Dyckerhoff and Tashi Walde)
    Doc. Math. 31 (2026), no. 4, pp. 787–853. doi:10.4171/dm/1051. arXiv:2402.12251
  8. Relative Calabi-Yau structures and perverse schobers on surfaces
    J. Noncommut. Geom. 20 (2026), no. 3, pp. 871–951. doi:10.4171/jncg/663. arXiv:2311.16597
  9. Perverse schobers, stability conditions and quadratic differentials I (with Fabian Haiden and Yu Qiu)
    Compos. Math. 162 (2026), Issue 9, pp. 2100-2156. doi:10.1017/S0010437X26103479. arxiv:2303.18249.
  10. Complexes of stable ∞-categories (with Tobias Dyckerhoff and Tashi Walde)
    Preprint: arxiv:2301.02606. Submitted.
  11. Cluster theory of topological Fukaya categories
    Preprint: arXiv:2209.06595. Submitted. Updated version
  12. Geometric models for the derived categories of Ginzburg algebras of n-angulated surfaces via local-to-global principles
    Accepted for publication in Sel. Math. New Ser. arXiv:2107.10091.
  13. Ginzburg algebras of triangulated surfaces and perverse schobers
    Forum Math. Sigma, 10:e8, 2022, doi:10.1017/fms.2022.1. arXiv:2101.01939.
  14. Spherical monadic adjunctions of stable infinity categories
    Int. Math. Res. Not. IMRN, 2023(15):13153–13213, 2023, doi:10.1093/imrn/rnac187. arXiv:2010.05294.