Centre for Mathematics, University of Coimbra

Seminars

Discrete harmonic analysis related to classical orthogonal polynomials

2024-04-23

Speaker: Alberto Arenas (University of La Rioja, Spain)

https://www.mat.uc.pt/~pgsfop/events.html...

On C^2-actions on complex surfaces

2024-04-24

Speaker: Aram Diaw (CMUP, Univ. Porto)

Given a complex surface \( S \), we are interested in the description of an \( C^2 \)- action on \( S \). It is well-known that this kind of action can be seen as the group of transformations given by the global flows of a pair of commuting complete vector fields. Our goal is to...

Torsionfree representations of Smith algebras

2024-04-24

Speaker: Samuel Lopes (Univ. Porto)

We will discuss representations of the Smith algebra which are free of finite rank over a subalgebra which plays a role analogous to that of the (enveloping algebra of the) Cartan subalgebra of the simple Lie algebra \( \mathfrak{sl}_2 \). In the case of rank 1, we obtain a full description...

TBA

2024-05-07

Speaker: Anabela Silva (Univ. Aveiro)

https://www.mat.uc.pt/~pgsfop/events.html...

TBA

2024-05-21

Speaker: Elena Berdysheva (Univ. Cape Town, South Africa)

https://www.mat.uc.pt/~pgsfop/activities.html...

On chain polynomials of posets

2024-06-26

Speaker: Leonardo Saud Maia Leite (KTH Royal Institute of Technology, Sweden)

The chain polynomial of a finite lattice \( \mathcal{L} \) is given by \( p_\mathcal{L} (x) = \sum_{k \geq 0} c_k(\mathcal{L})x^k \), where \( c_k(\mathcal{L}) \) is the number of chains of length \( k \) in \( \mathcal{L} \). The chain polynomials of posets in several important classes have...

Gap labelling for periodic Jacobi matrices on trees

2024-09-24

Speaker: Barry Simon (Caltech, USA)

https://www.mat.uc.pt/~pgsfop/activities.html...