Glen Lim
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Seminar talks

Extending the Reshetikhin–Turaev TQFT, November 2025, Junior Geometry and Group Theory Seminar, University of Oxford.

On the work in [Lim26b]. Abstract. Handwritten notes.

Central extensions of bordism bicategories, March 2025, Oxford Weekly Symmetries Meeting, University of Oxford.

On the work in [Lim26a]. Handwritten notes.

Topology Advanced Class, Oxford

Schedules and synopses can be found here. Notes for the other talks are generally available on the respective speakers' websites.

The Reeh–Schlieder theorem and additivity of conformal nets, May 2026, Topology Advanced Class on conformal nets and chiral CFTs.

The Reeh–Schlieder theorem on the cyclicity of the vacuum vector. The additivity property of conformal nets. Handwritten notes, based on [Hen14, pp. 16-20], [FJ96], [Tak72]. Typeset version (some analysis omitted).

Modular functors, February 2026, Topology Advanced Class on modular functors from conformal blocks of VOAs.

On classical and modern definitions of topological and complex modular functors. Handwritten notes, based on [BK01, Chapters 5-6], [MW20, Section 2], [DW25, Section 3].

Hochschild and cyclic homology, November 2025, Topology Advanced Class on the even filtration.

Hochschild homology, cyclic homology and variants. The HKR theorem and HKR filtration and their analogues. Handwritten notes, based on [Mor19, Sections 2-3].

Construction of super fibre functors, May 2025, Topology Advanced Class on Tannakian categories.

The construction of a super fibre functor for a Tannakian category. The category of complex super vector spaces as a categorified algebraic closure of the category of real vector spaces. Handwritten notes, based on [Del02 (English translation)] and [Joh15, Section 2].

The chain rule in Goodwillie calculus, February 2025, Topology Advanced Class in Goodwillie calculus.

The chain rule in Goodwillie calculus for functors from spectra to spectra. The statement of the generalisation of Blans–Blom. Handwritten notes, based primarily on [Chi07] with some reference to [Lur17, Section 6] and [BB24].

Noether's theorem, November 2024, Topology Advanced Class on factorisation algebras.

The generalisation of Noether's theorem in Costello–Gwilliam's factorisation algebras formulation of quantum field theory. Handwritten notes, based on [CG21].

Chern–Weil theory, May 2024, Topology Advanced Class on differential cohomology.

Connections and curvature of vector bundles and principal bundles. The Chern–Weil homomorphism from invariant polynomials to de Rham cohomology. Handwritten notes, based on [ADH21, Section 11] and [KN96, Chapter 2].

Sullivan's PL de Rham functor, February 2024, Topology Advanced Class on rational homotopy theory and formality of little disks.

Sullivan's PL de Rham functor as a Quillen equivalence. Minimal models as cofibrant objects in the model category of cdgas. Handwritten notes, based on [Hol21, Lectures 2-6].

Results about six-functor formalisms, November 2023, Topology Advanced Class on six-functor formalisms.

On circumstances in which the pullback and extraordinary pullback (or pushfoward and extraordinary pushfoward) in six-functor formalisms agree. Handwritten notes, based on [Sch22, Lecture VI].