2024-02-28

Speaker: Bjarne Kosmeijer (Univ. Amsterdam, Netherlands)

Lie groupoids are important objects in the study of symmetries, because they encode a broader notion of symmetries than just actions of Lie groups.
It is important, for instance in the context of index theory, to understand the equivariant geometric aspects of a Lie groupoid.
For Lie...

2024-02-28

Speaker: Carlos André (CMUC & Univ. Lisboa)

Describing the conjugacy classes or irreducible characters of the unipotent upper triangular group over a finite field is known to be an impossibly difficult problem. Superclasses and supercharacters have been introduced (under the names of "basic varieties" and "basic characters") as...

2024-03-13

Speaker: Gonçalo Varejão (CMUC, UC|UP PhD student)

2024-04-24

Speaker: Aram Diaw (CMUP, Univ. Porto)

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