* Dates within the next 7 days are marked by a star.
Shinji Koshida (Aalto University)
Tensor categories of Virasoro modules
* Tuesday 11 November 2025, 10:15, M3 (M234)
This talk is meant as a complement to Alexiss talk from last week. The goal is to demystify the construction of tensor categories of modules for vertex operator algebras (VOAs). There is a famously large body of work on this by HuangLepowsky and HuangLepowskyZhang, and it is certainly reasonable for most people to treat it as a "black box". However, I will try to explain that the tensor product of VOA modules is not as mysterious as it might seem. In fact, it fits into quite familiar mathematical ideasarising from a universal property, just as so many other constructions do. To keep things concrete, I will focus on the Virasoro algebra, following Alexis. So no prior knowledge of VOA theory will be needed.
Dr. Francesca Arrigo (University of Strathclyde)
Katz centrality... Just a one-trick pony?
* Tuesday 11 November 2025, 15:15, U3 (U141)
Further information
Complex networks are ubiquitous in our daily lives. Frequently, practitioners are interested in identifying the most important, or central, entities within the network. This goal can be achieved using centrality measures, which are functions that assign nonnegative scores to the entities in order to quantify their importance. There are several (families of) centrality measures in the literature, and in this talk I will focus on a specific one; Katz centrality. This centrality was introduced in the 1950s to measure the relative influence of an actor within a social network. Since its introduction, Katz centrality has been adapted to handle various types of graphs and relations, and I will cover some of these after a smooth introduction to networks, walk-based centrality measures, and the original Katz centrality. The goal of my talk is to help you decide for yourself whether the question in the title should be answered positively.
Ryan O'Loughlin (University of Reading)
The Numerical Range as a Spectral Set (50 minutes)
* Wednesday 12 November 2025, 10:15, M3 (M234)
The speaker is a guest of Jani Virtanen (UEF); his visit to Aalto is coordinated by Tuomas Hytönen.
Analysis seminar
4 speakers: Junnila, Melin, Schreuder, Troscheit
Helsinki-Stockholm Probability and Mathematical Physics days
Thursday 13 November 2025, 13:00, U5
Further information
Helsinki-Stockholm PMP 2025
4 speakers: Haunschmid Sibitz, Lafay, Toropova, Izyurov
Helsinki-Stockholm Probability and Mathematical Physics days
Friday 14 November 2025, 09:00, U5
Further information
Helsinki-Stockholm PMP 2025
Prof. Eveliina Peltola (Aalto University & Universität Bonn)
TBA
Tuesday 18 November 2025, 10:15, M3 (M234)
Anna-Mariya Otsetova
Malliavin calculus and a central limit theorem for the stochastic heat equation
Wednesday 19 November 2025, 10:15, M3 (M234)
Seminar on analysis and geometry
Finnish Mathematical Society Colloquium
TBA
Wednesday 19 November 2025, 16:00, U7
TBA
Finnish Mathematical Society Colloquium
Prof. Eveliina Peltola (Aalto University & Universität Bonn)
TBA
Tuesday 25 November 2025, 10:15, M3 (M234)
Leah Schätzler
TBA
Wednesday 26 November 2025, 10:15, M3 (M234)
Seminar on analysis and geometry
Prof. Tuomas Hytönen (Aalto University)
TBA
Tuesday 09 December 2025, 15:15, M1 (M232)
TBA
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