Calum Crossley
- Location: University College London
- E-mail: calum dot crossley dot 23 @ucl.ac.uk
- CV: cv.pdf (updated 2025)
About
Hello! I'm Calum Crossley, currently a PhD student in mathematics at UCL as part of the LSGNT, supervised by Ed Segal.
My research is within algebraic geometry, working with derived categories of sheaves on varieties. I am also interested in matrix factorizations of polynomials, which give a deformed version of these derived categories. More specifically, I have been using matrix factorizations to study categorical resolutions.
Preprints
- ' A categorical flop in dimension one' (2025).
Talks
- 'Guide to Orlov's theorem' for DOGS (notes), 25 Nov '25.
- 'Categorical resolutions from geometry' for DANCE (notes, video), 3 Nov '25.
- 'Crepancy of categorical resolutions' for the MAGIC Seminar, 23 Jun '25.
- 'Quivers and Koszul duality' for the Imperial Derived Categories Seminar (notes), 10 Mar '25.
- 'Matrix factorizations and Knörrer periodicity' for the KCL / UCL Junior Geometry Seminar (notes), 20 Jan '25.
- 'Matrix factorizations and Knörrer periodicity' for DOGS (notes), 14 Jan '25.
- 'Cohomology and derived categories' for the Imperial Junior Geometry Seminar, 4 Oct '24.
Travels
- GAP XX, Kyoto, Apr '26.
- FanoHK, Toulouse, Dec '25.
- CAGE, Leiden, Sep '25.
- BrAG VII, Nottingham, Sep '25.
- Workshop on derived categories, Cetraro, Jul '25.
- GLEN, Sheffield, Apr '25.
- Mirrors in the Midlands, Birmingham, Aug '24.
Organization
- DOGS (Derived Obsessed Graduate Students), 2025-2026.
- KCL / UCL Junior Geometry Seminar, 2024-2025.
Teaching
- Algebra 2 (UCL), TA, Spring '26.
- Algebra 3 (UCL), TA, Autumn '25.
- Advanced Linear Algebra (UCL), Marker, Spring '25.
- Effective Methods in Algebra (LMO), TA, Spring '25.
- Algebra 1 (UCL), TA, Autumn '24.
- Foundations and Proofs (UCL), Marker, Autumn '24.