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....

TBA

2024-09-20

Speaker: Lubos Pick (Charles University, Prague, Czech Republic)

TBA...

TBA

2024-09-20

Speaker: Luís Daniel Abreu (NuHAG, University of Vienna, Austria)

TBA...

Differential relations and other properties of two families of 2-orthogonal polynomial eigenfunctions

2024-09-20

Speaker: Teresa A. Mesquita (Polytechnic Institute of Viana do Castelo & CMUP)

TBA...

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...

Operations in Khovanov homology

2024-10-09

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

I will give an introduction to Khovanov homology, a link invariant introduced by Khovanov twenty-five years ago, and then explain how to construct operations on this link invariant following the work of Lipshitz and Sarkar on Khovanov spectra....

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)

Following the study of the categorical features of preordered groups of [1], in this talk we study the category of right-preordered groups and monotone homomorphisms. We start by showing that this category has exactly the same exactness properties as the category of preordered groups....

Rectifiability in Carnot groups

2024-12-03

Speaker: Daniela Di Donato (University of Pavia, Italy)

TBA...