NCG-Leiden
Seminars
- 2026 fall
- - Research seminar on NCG and solid-state physics
- 2024 spring
- - Research seminar
- 2023 fall
- - Foliations
- 2022 fall
- - Groupoid C*-algebras
- 2022 spring
- - K(K)-Theory
- 2021 fall
- - Deformation Quantization and Index Theory
Mini-courses
- 2024 spring
- - Connections and curvatures in NCG
Workshops
- 2025
- - A day on operator algebras and NCG
- - NCG Day 2025
- 2023 spring
- - Geometry and Operator ALgebras 2023
- 2022 fall
- - NCG Day 2022
Noncommutative Geometry Research Seminar
In the first semester of 2026/2027 the noncommutative geometry group will run a local NCG research seminar.
List of talks
10 Sep 2024: Matt Verhoeven (Leiden)
Title: Spectral truncations and the spectral localizer on SU(2)
Abstract: In this talk I will present parts of my master thesis. Spectral truncations in the sense of Connes–Van Suijlekom are a method to approximate noncommutative spaces (spectral triples) by considering only a finite amount of spectral information, typically provided by a Dirac operator. I will present this framework and its application to the manifold SU(2). Furthermore, this can be applied to determine K-theoretic invariants of SU(2) using the spectral localizer introduced by Loring and Schulz-Baldes.