The concept of a rank function on an additive category with cokernels, or more generally, on one…
Seminars
Future and Ongoing Seminars
FC1 1.09 |
Geometry and Topology
Abstract: I will review the application of Hamiltonian flows in imaginary time to problems in…
Speaker: João Luís Pimentel Nunes
Past Seminars
Room M031 |
Dynamical Systems
Discutiremos alguns exemplos no bordo do conjunto dos sistemas uniformemente hiperbólicos. Destaca
Speaker: Isabel Rios (IMPA, Brasil)
Room M029 |
Dynamical Systems
We consider stochastic processes arising from dynamical systems by evaluating an observable
function
Speaker: Jorge Freitas
Room M031 |
Dynamical Systems
L.A. Bunimovich and B.Z. Webb developed a theory for isospectral graph reduc- tion. This procedure m
Speaker: Maria Joana Torres (CMAT e DMA, Universidade do Minho)
Room 0.06, FC1 |
Geometry and Topology
I will discuss work in progress aiming to characterize certain cohomological obstructions to symplec
Speaker: Gustavo Granja (IST, Lisbon)
Room M031 |
Dynamical Systems
We develop the concepts of ontogenesis and phylogenesis in the context of discrete
dynamical systems
Speaker: Carlos Ramos (Universidade de Évora)
FC1 - 0.06 |
Geometry and Topology
It is well known that, in dimension three, every tight contact structure on a connected sum is a con
Speaker: Paolo Ghiggini (Nantes)
Room M031 |
Dynamical Systems
We consider random perturbations of general non-uniformly expanding maps, possibly having a non-deg
Speaker: Hélder Vilarinho (UBI)
Room FC1.007, DMat-FCUP |
Semigroups, Automata and Languages
Given a regular language $L$, we study the language of words $dis{L}$, that distinguish between pa
Speaker: Rogério Reis (FCUP/CMUP)
FC1 - 0.06 |
Geometry and Topology
It is known since Beauville (1979) that if the canonical image $\phi(S)$ of a surface of general typ
Speaker: Carlos Rito (CMUP)
Room M031 |
Dynamical Systems
We construct networks from simple robust heteroclinic cycles in R4.
Under appropriate assumptions on
Speaker: Alexander Lohse (Universitat Hamburg, Germany)
Room FC1.006, DMat-FCUP |
Semigroups, Automata and Languages
In this talk, I will collect some results about random walks on regular languages over a finite alph
Speaker: Lorenz Gilch (University of Graz, Austria)
FC1 0.06 |
Geometry and Topology
We propose an extension of Heegaard Floer homology to contact manifolds of higher dimensions based
Speaker: Vincent Colin (Nantes)
Room M031 |
Dynamical Systems
Solutions of functional equations may have exotic properties: they may be singular, fractal or ev
Speaker: Cristina Serpa (CMAF, Lisboa)
Room FC1.029, DMat-FCUP |
Semigroups, Automata and Languages
The word problem for omega terms over a variety (of finite monoids) V is the following decision prob
Speaker: Jan Philipp Wachter (University of Stuttgart, Germany)
Room 0.07, FC1 |
Geometry and Topology
A celebrated theorem due to Gromov and Eliashberg states that the C^0-limit of a sequence of sym
Speaker: Rémi Leclercq
Room FC1.006, DMat-FCUP |
Semigroups, Automata and Languages
The Karoubi envelope plays a fundamental role in Tilson's Delay theorem. It is also known that two s
Speaker: Alfredo Costa (FCTUC/CMUC)
Room 0.06, FC1 |
Geometry and Topology
The work of Hausel proves that the Bialynicki-Birula stratification of the moduli space of rank two
Speaker: Ronald Zúñiga-Rojas (CMUP, CIMM-Universidad de Costa Rica)
Room M031 |
Dynamical Systems
Apresentamos alguns resultados sobre a existência de órbitas periódicas no
problema restringido d
Speaker: Alessandro Margheri(*) (University of Lisbon and CMAF)
M006 |
Geometry and Topology
In this talk I will use a long exact sequence (after recalling its construction) relating the Legend
Speaker: Baptiste Chantraine (Nantes)
Room FC1.029, DMat-FCUP |
Semigroups, Automata and Languages
In this work, we define a congruence $\eta^{\ast}$ on semigroups. For the finite semigroups $S$, $
Speaker: M. Hossein Shahzamanian (CMUP)