Centre for Mathematics, University of Coimbra

Seminars

Propagation of weak log-concavity along generalised heat flows via Hamilton-Jacobi equations

2026-03-11

Speaker: Louis-Pierre Chaintron (EPFL, Lausanne, Switzerland)

A well-known consequence of the Prékopa-Leindler inequality is the preservation of log-concavity by the heat semigroup. Unfortunately, this property does not hold for more general semigroups. In this talk, leveraging the probabilistic notion of reflection coupling, I will present a slightly...

Yet another characterization of discrete classical orthogonal polynomials on linear lattices?

2026-03-12

Speaker: Guillermo Gordillo-Núñez (CMUC, University of Coimbra)

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Construction and classification of multi-bubble solutions for some critical evolution equations

2026-03-13

Speaker: Jean-Baptiste Castéras (Univ. Lisboa)

In this talk, I will review recent results on the construction and classification of multi-bubble solutions for the critical heat/wave/Schrödinger equation. ...

Dual presentations of locales

2026-03-17

Speaker: Graham Manuell (Stellenbosch Univ., South Africa)

Just as usual presentations of frames allow us to define frames using sets of generators and relations, we will discuss how to define frames using compact Hausdorff locales of generators and relations. I will explain how to present a compact Hausdorff locale in terms of itself and describe...

Perfectly regular frames

2026-03-17

Speaker: Ana Belén Avilez (Chapman Univ., USA)

Cozero elements of a frame play an important role in point-free topology. The set of cozero elements, \( \mathrm{Coz}L \), of a frame \( L \) is a sub \( \sigma \)-frame of \( L \) (that is, a sublattice closed under countable suprema and finite infima). Moreover, the lattice \(...

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2026-03-20

Speaker: Tiago Picon (Universidade de São Paulo, Brazil)

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2026-03-27

Speaker: Sven Jarohs (Goethe-Universität, Frankfurt, Germany)

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2026-04-01

Speaker: Pedro M. Silva (Univ. Lisboa)

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Partial regularity in nonlocal problems

2026-04-16

Speaker: Giuseppe Mingione (Università di Parma, Italy)

The theory of partial regular regularity for elliptic systems replaces the classical De Giorgi-Nash-Moser one for scalar equations asserting that solutions are regular outside a negligible closed subset called the singular set. Eventually, Hausdorff dimension estimates on such a set can be...

Block eigenvalues and matrix roots of matrix polynomials: Applications to ordinary differential matrix equations and matrix differences equations

2026-04-17

Speaker: Manuel A. Facas Vicente & José Vitória (Univ. Coimbra, Portugal)

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2026-05-04

Speaker: Soichiro Fujii (Kyoto Univ., Japan)

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2026-05-04

Speaker: Zeinab Galal (Kyoto Univ., Japan

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Can a non-trivial isometric quotient of the unit n-sphere be made arbitrarily small?

2026-05-07

Speaker: Claudio Gorodski (Univ. São Paulo, Brazil)

We will explain our proof of the existence of \( \varepsilon >0 \) such that every quotient of the unit sphere \( S^n (n\geq 2) \) by a isometric group action has diameter zero or at least \( \varepsilon \). The novelty is the independence of \( \varepsilon \) from \( n \). The...

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2026-05-12

Speaker: Juan Gabriel Calvo (Univ. of Costa Rica, Costa Rica)

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2026-06-16

Speaker: Rafael Díaz Fuentes (Università di Cagliari, Italy)

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2026-06-19

Speaker: Irene Fonseca (Carnegie Mellon University, USA)

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2026-10-22

Speaker: Thomas Kriecherbauer (Univ. of Bayreuth, Germany)

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