Centre for Mathematics, University of Coimbra

Seminars

On the structure of the infinitesimal generators of semigroups with discrete Lyapunov functionals

2024-04-17

Speaker: Carlos Rocha (Instituto Superior Técnico, Lisbon)

Dynamical systems generated by scalar reaction-diffusion equations enjoy special properties that lead to a very simple structure for the semiflow. Among these properties, the monotone behavior of the number of zeros of the solutions plays an essential role. This discrete Lyapunov functional...

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...

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...