Centre for Mathematics, University of Coimbra

Seminars

When are exact categories co-exact?

2025-10-07

Speaker: James Gray (Stellenbosch Univ., South Africa)

The aim of the talk is two-fold: (i) to explain that finitely co-complete pretoposes are co-ideally-exact [J] and co-arithmetical [P], and (ii) to explain that there are conditions in common between additive and lextensive categories, which together with exactness (and finite...

Noncommutative Poisson structure and invariants of matrices

2025-10-07

Speaker: Xabier García-Martínez (Univ. de Santiago de Compostela, Spain)

In this talk we will explain how we used methods coming from non-associative algebras and from computational algebra to obtain the full description of the ring of invariants of pairs of \( 4\times 4 \) matrices, which could not be solved using the standard representation theory methods....

Polynomial identities in Algebra

2025-10-08

Speaker: Ginevra Giordani (Università degli Studi dell'Aquila, Italy)

See attached PDF...

Basic zero-dimensional spaces: a unifying framework for continuity and openness

2025-10-21

Speaker: João Areias (DMUC)

TBA...

Dimension-free Fourier restriction inequalities

2025-10-24

Speaker: Diogo Oliveira e Silva (IST, Lisboa)

Let \( {{\bf R}_{\mathbb S^{d-1}}}(p\to q) \) denote the best constant for the \( L^p(\mathbb R^d)\to L^q(\mathbb S^{d-1}) \) Fourier restriction inequality to the unit sphere \( \mathbb S^{d-1} \), and let \( {\bf R}_{\mathbb S^{d-1}} (p\to q;\textup{rad}) \) denote the corresponding...

Marcinkiewicz exponent and boundary value problems for iterated Cauchy-Riemann and Dirac operators in fractal domains

2025-11-04

Speaker: Carlos Daniel Tamayo Castro (Instituto Politécnico Nacional, Mexico)

TBA...

Special Colloquium on Fraudulent Publishing in Mathematical Sciences

2025-11-17

Speaker: Ilka Agricola (Chair of the Committee on Electronic Information and Communication of the IMU, Philipps-Universität Marburg, Germany)

TBA moderated by Jorge Buescu (EMS Vice-President, University of Lisbon, Portugal)...

Terminal coalgebras in graduated categories

2025-11-20

Speaker: Jirí Adámek (Czech Technical Univ., Prague, Czech Republic)

Graduated categories were introduced in [1] in order to prove that finitary endofunctors are right adjoints iff they preserve countable limits. Recently, these categories turned out to be useful in categorical colagebra: every finitary endofunctor preserving finite intersections has a...

TBA

2025-12-02

Speaker: Nadja Egner (UCLouvain, Belgium)

TBA...

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2025-12-02

Speaker: Tom Leinster (The University of Edinburgh, Scotland)

TBA...

On extremal properties of Laplace transform and non uniqueness solutions of the heat equation

2025-12-11

Speaker: João Fontinha (Univ. Lisbon, Portugal)

TBA...

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2025-12-15

Speaker: Karl Grosse-Erdmann (Université de Mons, Belgium)

TBA...

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2026-01-13

Speaker: Nicola Gambino (University of Manchester, UK )

TBA...

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2026-01-13

Speaker: Geoffrey Cruttwell (Mount Allison University, Canada)

TBA...

The ODE/IM correspondence for the quantum KdV model

2026-01-20

Speaker: Gabriele Degano (Univ. Lisbon, Portugal)

TBA...

Degenerate versions of hypergeometric Bernoulli and Euler polynomials

2026-02-25

Speaker: Yamilet Quintana (Universidad Carlos III de Madrid, Spain)

TBA...