Talks

Below are slides or notes from selected recent talks.

1. Abelian gauged Rozansky--Witten theory via quantum Lie superalgebras. Slides. RHIND Seminar on Physical Mathematics, June 2024.

2. Abelian gauged Rozansky--Witten theory via quantum Lie superalgebras. Slides. MIST 2024 workshop, The Chinese University of Hong Kong, June 2024.

3. Topological field theories from Gaiotto--Witten Lie superalgebras. Slides. Seminaire de Geometrie et Topologie, Institut de Mathematiques de Toulouse, May 2024.

4. Representations of unrolled quantum Lie superalgebras and non-semisimple topological field theory. Slides. Oberseminar Representation Theory, University of Bonn, May 2024.

5. Topological field theories from Gaiotto--Witten Lie superalgebras. Slides. Topology Seminar, Texas State University, April 2024.

6. Hall algebras via 2-Segal spaces. Slides. Higher Segal Spaces and their Applications to Algebraic K-Theory, Hall Algebras, and Combinatorics, Banff International Research Station, Jan. 2024.

7. Uq(gl(1|1)) and U(1|1) Chern-Simons theory. Slides. TQFT Club, IST Lisbon, Mar. 2023. A recording of the talk is available here.

8. Uq(gl(1|1)) and U(1|1) Chern-Simons theory. Slides. USask PIMS Geometry, Algebra and Physics Seminar, Feb. 2023.

9. Matrix factorizations and Landau-Ginzburg B-models. Notes. NSF Workshop and Matrix Factorizations and Related Topics, University of Notre Dame. Nov. 2022. Recordings of the talks are available here.

10. Uq(gl(1|1)) and U(1|1) Chern-Simons theory. Slides. Fall AMS Sectional Meeting, University of Utah, Special Session on Geometry and Representation Theory of Quantum Algebras and Related Topics, Oct. 2022.

11. Uq(gl(1|1)) and U(1|1) Chern-Simons theory. Slides. Fall AMS Sectional Meeting, University of Massachusetts Amherst, Special Session on the Combinatorics and Geometry of Jordan Type and Commuting Varieties, Oct. 2022.

12. Categorical group actions on matrix factorizations and Knorrer periodicity. Slides. Fall AMS Sectional Meeting, University of Massachusetts Amherst, Special Session on Homotopical Algebra and Higher Structures, Oct. 2022.

13. Orientation twisted transgression in representation theory and physics. Slides. Virtual Spring AMS Sectional Meeting, Special Session on Connections between homotopical algebra and geometry, May 2021.

14. Algebraic K-theory and Grothendieck-Witt theory of monoid schemes. Slides. Virtual Spring AMS Sectional Meeting, Special Session on Tropical Geometry, F1-connections and Matroids, Mar. 2021.

15. Green-type theorems for representations of Hall algebras. Slides. Birmingham-Warwick-Pretoria Algebra seminar, Feb. 2021.

16. Real categorical representation theory in topology and physics. Slides. Opening Workshop of the Higher Homotopical Structures programme, Centre de Recerca Matematica, Feb. 2021.

17. An introduction to refined Donaldson-Thomas theory. Slides. Reading group on Stability conditions, DT invariants and their geometry. Max Planck Institute for Mathematics, May 2020.

18. Green-type theorems for Hall modules of quivers. Notes. Representation Theory Seminar, RWTH  Aachen, Nov. 2019.

19. Twisted loop transgression and categorical character theory. Notes. Geometric Representation Theory Seminar, Yau Mathematical Sciences Center, Tsinghua University, Oct. 2019.

20. Orientifold Donaldson-Thomas theory and Green-type theorems for Hall modules. Notes. Algebra and Representation Theory in the North, University of Edinburgh, Sept. 2019.

21. Unoriented topological field theory in low dimensions. Notes. Topology Seminar, Max Planck Institute for Mathematics, July 2019.

22. Characters in higher (Real) representation theory. Slides. Representations of monoidal categories and 2-categories, University of East Anglia, July 2019.

23. Degenerate versions of Green's theorem for Hall modules. Notes. Thomas Poguntke Memorial Conference, Universitat Autonoma de Barcelona, Feb. 2019.

24. Unoriented Dijkgraaf-Witten theory. Notes. Algebra and Mathematical Physics Seminar, Universitat Hamburg, Jan. 2019.

25. Introduction to orientifold Donaldson-Thomas theory. Notes from an expository lecture in the Hall algebras Learning Seminar, The University of Bonn, Jan. 2019.

26. Notes on Chern-Simons theory. Notes 1, 2 from expository lectures in the Topology Seminar, Max Planck Institute for Mathematics, Fall 2018.

27. The Real categorical representation theory of finite groups. Notes. Oberseminar Representation theory, University of Bonn, Nov. 2018.

28. The Real categorical representation theory of finite groups and unoriented topological field theory. Slides. NYU Abu Dhabi, Oct. 2018.

29. Real 2-representation theory in mathematics and physics. Poster from String Math 2018, Tohoku Forum for Creativity, Sendai, Japan, June 2018.

30. Video of my lecture series Cohomological Donaldson-Thomas theory with orientifolds. String Field Theory of the B-model, IBS Center for Geometry and Physics, Jan. 2016.

31. Video of my talk A mathematical approach to BPS state counting in orientifold string theory. IBS Center for Geometry and Physics, Dec. 2015.

32. Cohomological Hall modules and Donaldson-Thomas theory with orientifolds. Poster from GAP XIII: Derived Geometry. IBS Center for Geometry and Physics, July 2015.

33. Orientifold Donaldson-Thomas theory of quivers. Slides from a talk given at KIAS Conference on Strings, Quivers and Cluster Algebras in Mathematical Physics, Dec. 2014.

34. Quiver Invariants and Orientifolds. Slides from a talk given at String Math 2014, June 2014.