Centre for Mathematics, University of Coimbra

Seminars

Convex matrix functions

2024-09-18

Speaker: Takashi Sano (Yamagata Univ., Japan)

In this talk, we will address some topics related to Loewner and Kraus matrices, inertia of Kraus matrices, matrix perspectives, strongly convex matrix functions, positive definiteness of Hadamard inverses, and inequalities of indefinite type....

Gap labelling for periodic Jacobi matrices on trees

2024-09-24

Speaker: Barry Simon (Caltech, USA)

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

Pointfree theories of T0 spaces

2024-09-24

Speaker: Anna Laura Suarez (CMUC, Univ. Coimbra)

Pointfree topology regards certain order-theoretical structures, called frames, as topological spaces. We regard frames as spaces in virtue of the lattice of open set of every space being a frame. Not all frames are lattices of open sets; nonetheless, studying all frames as spaces offers...

Some recent results on algebras of partial functions

2024-09-24

Speaker: Brett McLean (Ghent Univ., Belgium)

We will investigate algebraic structures that are isomorphic to a set of partial functions equipped with selected operations (e.g. composition, intersection, etc.). I will spend most of the time describing results about completely representable algebras - these are the algebras that can be...

TBA

2024-10-09

Speaker: Federico Moran (Universidad Autónoma de Madrid, Spain)

TBA...

TBA

2024-10-22

Speaker: Diana Rodelo (CMUC, Univ. Algarve)

TBA...

Right-preordered groups from a categorical perspective

2024-10-22

Speaker: Maria Manuel Clementino (CMUC, Univ. Coimbra)

TBA...