The Gruenberg-Kegel graph of a group is defined as the graph whose vertices are the primes that…
Seminars
Future and Ongoing Seminars
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
Speaker: Diego Lucas Garcia
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
Chen, Erdős, and Staton asked in 1996 how many edges are required in an n-vertex graph to…
Speaker: António Girão
FC1 031 and online |
Algebra, Combinatorics and Number Theory
This has been an open question for more than 70 years. I'll review what is known, including some…
Speaker: Ken Brown
FC1 031 and online |
Algebra, Combinatorics and Number Theory
Quasi-hereditary algebras are a class of finite-dimensional associative algebras that appear…
Speaker: Tiago Cruz
FC1 1.09 |
Geometry and Topology
Abstract: I will review the application of Hamiltonian flows in imaginary time…
Speaker: João Luís Pimentel Nunes
FC1 031 and online |
Algebra, Combinatorics and Number Theory
Quasigroupoids and weak Hopf quasigroups are non-associative generalizations of groupoids and…
Speaker: Ramón González Rodríguez
FC1 031 and online |
Algebra, Combinatorics and Number Theory
Polynomial expansion concerns the heuristic expectation that, for a typical polynomial P in n…
Speaker: Nuno Arala Santos
Past Seminars
room 006 (FC1-Maths Building) |
Algebra, Combinatorics and Number Theory
In a joint work with Marco Mackaay, we categorify the extended affine type A Hecke algebra and the a
Speaker: Anne-Laure Thiel (Uppsala Univ./Sweden)
Room M031 |
Dynamical Systems
In this talk, we describe some recent results on super-polynomial decay of correlations for geometri
Speaker: Paulo Varandas (UFBA - Brasil)
Room M004 |
Dynamical Systems
We consider some nonuniformly hyperbolic invertible dynamical system which are modeled by a Gi
Speaker: Benoit Saussol (Laboratoire de Mathématiques de Brest, Université de Bretagne Occidentale, Brest)
Room M031 |
Dynamical Systems
We analyze the dynamics of a class of $\mathbb{Z}_6-$equivariant systems of the form $\dot{z}=pz^2\b
Speaker: Adrian Murza
Anfiteatro 0.03 |
Geometry and Topology
There is (almost) no information available on the literature about complex algebraic surfaces of gen
Speaker: Carlos Rito
Room M031 |
Dynamical Systems
We consider time dependent mean-field games (MFG) with a local power-like dependence on the meas
Speaker: Edgard Pimentel (CAMGSD{IST{UTL, Lisbon)
Room FC1030 |
Semigroups, Automata and Languages
In order to solve the k-word problem for the pseudovariety LG of local groups, we began constructing
Speaker: Lurdes Teixeira (DMat-UM / CMat-UM)
Room M031 |
Dynamical Systems
Synchronization is a fundamental nonlinear phenomenon, which can be observed in many real systems. W
Speaker: Acilina Caneco (ISEL - CIMA - Universidade de evora)
Room M031 |
Dynamical Systems
We study the set of C1 area-preserving maps on a surface displaying a reversing
isometry of degree 2
Speaker: Alexandre Rodrigues (FCUP - CMUP)
Room M031 |
Dynamical Systems
Consideramos difeomorfismos de uma variedade Riemanniana possuindo em alguma região compacta positi
Speaker: Jose Ferreira Alves
Room FC1006, DMat-FCUP |
Semigroups, Automata and Languages
To each irreducible subshift over a finite alphabet, one may naturally associate a regular J-class o
Speaker: Jorge Almeida
(FCUP - CMUP)
(FCUP - CMUP)
Room M031 |
Dynamical Systems
We present an extension of the notion of infinitesimal Lyapunov function to singular flows, and from
Speaker: Vítor Araújo (UFBA - Brasil)
Room M030 |
Dynamical Systems
A classical theorem on symmetric random walks on groups asserts that the spectral radius of the asso
Speaker: Manuel Stadlbauer (Universidade Federal da Bahia, Brasil)
Anfiteatro 0.29 |
Geometry and Topology
Exponential families are a particular class of statistical manifolds which are important in statisti
Speaker: Mathieu Molitor (University of Bahia, Salvador)
Room M031, DMat-FCUP |
Semigroups, Automata and Languages
Malcev and independently Neumann and Taylor have shown that nilpotent groups can be defined by using
Speaker: Mohammad Hossein (CMUP)
M003, DMat-FCUP |
Geometry and Topology
Gromov width of a symplectic manifold M is a supremum of capacities of balls that can be symplectica
Speaker: Milena Pabiniak (IST, Lisbon)
Room M005, DMat-FCUP |
Semigroups, Automata and Languages
Synchronizing automata has previously been studied for finite automata. In a finite automaton, a wor
Speaker: Mahsa Shirmohammadi
(LSV, ENS de Cachan, France and ULB, Belgium)
(LSV, ENS de Cachan, France and ULB, Belgium)
Room M029. Coffee with the speaker is served after the talk (15h30-16h00). |
Dynamical Systems
In the first part of the talk there will be introduced definitions of covering and locally covering
Speaker: Sergey Zhukovskiy (DEEC - FEUP)
Room FC1-M031 (Maths Building) |
Analysis
We deal with a family of orthogonal polynomials as perturbed of Chebyshev polynomials of second kind
Speaker: Pascal MARONI
CNRS - Centre National de Recherche Scientifique
Laboratoire Jacques-Louis Lions
Universite Pierre Marie Curie, Paris, France
CNRS - Centre National de Recherche Scientifique
Laboratoire Jacques-Louis Lions
Universite Pierre Marie Curie, Paris, France
Room M029. Coffee with the speaker is served after the talk (15h30-16h00). |
Dynamical Systems
We consider a discrete dynamical system f : M -> M, where M is a Riemannian manifold and f is a…
Speaker: Davide Azevedo (FCUP)