* Seuraavan viikon tapahtumat merkitty tähdellä
Dr. Alexis Langlois-Rémillard (Universität Bonn)
Quantum groups at roots of unity with a view towards logCFT
* Tuesday 04 November 2025, 10:15, M3 (M234)
Quantum groups are deformations of the universal enveloping algebras of a Lie algebra with a parameter q. When the parameter q is generic, the representations follow the structure of those of the Lie algebra, but when it is a root of unity, the representation theory becomes much richer. In addition to becoming richer, there are multiple ways of defining a quantum group at roots of unity. The goal of this talk is to survey the versions of the quantum group Uq(sl2) at roots of unity and report on a categorical equivalence between their representations and those of vertex operator algebras given in recent work by Gannon--Negron.
Erno Vihanto
Minimizers on Discrete Approximations of Metric Measure Spaces (MSc thesis presentation)
* Wednesday 05 November 2025, 10:15, M3 (M234)
Seminar on analysis and geometry
Lin Wu (Xiamen University)
Schatten properties of commutators of fractional integrals on spaces of homogenous type
* Wednesday 05 November 2025, 11:15, M3 (M234)
Analysis seminar / Hytönen
Olavi Nevanlinna (Aalto)
Basics on SCI-hierarchy and towers of algorithms
* Wednesday 05 November 2025, 14:00, M2 (M233)
Numerical Analysis seminar
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 OLoughlin (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
Anna-Mariya Otsetova
TBA
Wednesday 19 November 2025, 10:15, M3 (M234)
Seminar on analysis and geometry
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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