Ka Ho Wong - Asymptotics of K-L-V partition function, cusped 3-manifolds, and Teichmuller TQFT

Ka Ho Wong - Asymptotics of K-L-V partition function, cusped 3-manifolds, and Teichmuller TQFT

Formal & Physical Sciences Mathematics PBMathematicsPBPTopology
🎙 Ka Ho Wong 👥 44K 📅 October 13, 2026 ⏱ 51 min 👁 408 📄 original study 🧭 2026-10-16
Available in: English (current) Français

Keywords

KLV partition functioncusped 3-manifoldsasymptoticsquantum dilogarithmNeumann-Zagier

Summary

This is a research talk by Ka Ho Wong at IPAM’s Hyperbolic Structures and Quantum Invariants Workshop. The speaker introduces the Kashaev-Luo-Vartanov (KLV) partition function for ideal triangulations of cusped 3-manifolds supporting angle structures. He reviews its definition using quantum dilogarithms and hyperbolic gamma functions, and explains its invariance properties under Pachner moves and angle deformations. A key tool is the equivalence between the KLV partition function and a Teichmüller TQFT, argued through a decomposition property and the relationship with the Andersen-Kashaev partition function. The main result states that for geometric triangulations, the asymptotic expansion of the KLV partition function captures hyperbolic volume and adjoint twisted Reidemeister torsion. To prove this, the speaker constructs a generalized Jones function for knots in S^3 and shows a relation between the KLV and Teichmüller TQFT partition functions. The talk concludes with ongoing work on the asymptotic behavior of a related Reshetikhin-Turaev type function. The presentation is highly technical and targets an audience of specialists in quantum topology and hyperbolic geometry.

167 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk presents original research with clear mathematical value: establishing rigorous asymptotic results for the KLV partition function and connecting it to known invariants. The argumentation is structured and uses a combination of known results (e.g., Neumann-Zagier theory, quantum dilogarithm properties) and new constructions (generalized Jones function). The speaker gives explicit formulas and highlights logical steps, making the reasoning accessible to experts. The conjecture linking KLV to Teichmüller TQFT is motivated by structural analogies and supported by the decomposition property, lending credibility to the overall framework.

Scientific Rigor, Source Quality, Title Accuracy

The talk is grounded in the published work of Kashaev, Luo, Vartanov, Andersen, Ben Aribi, and others, and the speaker explicitly credits these sources. The title accurately describes the content, though it is long and technical. The presentation adheres to standard mathematical rigor; definitions and theorems are stated precisely. The lack of a full proof in the talk is compensated by the depth of the ideas and the apparent validity of the results as per the abstract. No public comments are available to assess broader reception.

187 words

Title / Content Match

The title accurately reflects the content: the speaker discusses the KLV partition function, its asymptotics, and its connection to Teichmuller TQFT, including generalized Jones functions and volume conjectures.

Quality & Reliability

9/10

The talk is given at a high-level IPAM workshop by a Yale researcher, presenting rigorous mathematical results with proofs sketched; the technical content is typical of original research, and the presentation is coherent and precise.

Key Moments

Cited Sources

Contribution & Novelties

The talk presents a rigorous asymptotic analysis of the KLV partition function, linking it to hyperbolic geometry and Teichmüller TQFT. The generalization of the Jones function for knot complements is an original contribution. This bridges combinatorial quantum invariants with geometric invariants, strengthening the volume conjecture framework.

Pour aller plus loin :

  • Volume conjecture — Directly relevant to the asymptotic behavior discussed.
  • Teichmüller TQFT — Background on the Teichmüller space and TQFT connections.
  • Turaev–Viro invariants — Related state sum invariants in quantum topology.
  • Quantum dilogarithm — Key function used in the constructions.

91 words

Radar Profile

The radar profile shows very high technical level and information quality, with slightly lower quantity due to the density of the presentation. Reliability is moderate high, consistent with a workshop talk. The talk is heavy on formalism, as expected for this mathematical audience, resulting in a strong but narrow profile.

Reliability 8/10