Seminars

FC1.004 |
Dynamical Systems

Quenched decay of correlations for random expanding Lorenz maps

The expanding Lorenz map, which is obtained by taking a Poi…

Speaker: Andrew Larkin
FC1.030 |
Dynamical Systems

About the stability of heteroclinic cycles: a new approach

Title: About the stability of heteroclinic cycles: a new approach

Speaker: Alexandre…

Speaker: Alexandre Rodrigues
Room M030, DMat-FCUP |
Computational Mathematics

Tempered Monoids of Real Numbers, the Golden Fractal Monoid, and the Well-Tempered Harmonic Semigroup

Abstract

Speaker: Maria Bras-Amorós
FC1.030 |
Dynamical Systems

Symmetries of smooth flows and their time-t maps

We study the discrete centralizers of smooth flows and their time-t maps. Centralizers describe…

Speaker: Wescley Bonomo
Online Zoom meeting |
Semigroups, Automata and Languages

Eventually fixed points of endomorphisms of virtually free groups

The study of the subgroup fixed by an automorphism of a free group started with the work of…

Speaker: André Carvalho
FC1.031 |
Dynamical Systems

Product of isometries of strongly hyperbolic spaces

The study of random products of operators appears naturally in many
areas of mathematics…

Speaker: Luís Sampaio
Online Zoom meeting |
Semigroups, Automata and Languages

Alternating and symmetric groups with Eulerian generating graph

Given a finite group $G$, the generating graph $\Gamma(G)$ of $G$ has as vertices the (…

Speaker: Claude Marion
Online seminar |
Algebra, Combinatorics and Number Theory

Domino tilings in dimension 3

In dimension 2, a domino is a $2\times 1$ rectangle. Domino tilings of quadriculated regions…

Speaker: Nicolau Saldanha
FC1-029 |
General seminar of CMUP

Frailty Variation in Population Dynamics: adventures and disadventures of an elusive concept

Abstract: Selection acting on unmeasured individual variation is a common source of bias in the…

Speaker: Gabriela Gomes
1.09 |
Geometry and Topology

Finite group actions on $G$-Higgs bundle moduli spaces and a Prym--Narasimhan--Ramanan type construction

In 1975 Narasimhan and Ramanan studied the action of a line bundle $L$ of finite order on the…

Speaker: Guillermo Barajas Ayuso
FC1.031 |
Dynamical Systems

Strange attractors in a seasonally forced epidemic SIR model

We analyse the forced SIR model to investigate the…

Speaker: João Carvalho
Online Zoom meeting |
Semigroups, Automata and Languages

Freeness of Schützenberger groups of primitive substitutions

Following a correspondence due to Almeida, every uniformly recurrent language determines a…

Speaker: Herman Goulet-Ouellet
FC1-029 |
General seminar of CMUP

Behavior of a typical automorphism

Abstract: We will discuss three simple automorphism groups: the group of bijections on the set…

Speaker: Dario Darji
FC1.004 |
Dynamical Systems

Generalized hyperbolicity and the shadowing property

In this talk we discuss hyperbolicity, expansivity, the shadowing property and structural…

Speaker: Dario Darji
online |
Geometry and Topology

On semicompleteness of Halphen systems

Abstract. In this talk we will focus on semicomplete Halphen vector fields.

Speaker: Ahmed Elshafei
Online Zoom meeting |
Semigroups, Automata and Languages

Well Quasi-Orders Arising from Finite Ordered Semigroups

In 1985, Bucher, Ehrenfeucht and Haussler studied derivation relations associated with a given…

Speaker: Ondřej Klíma
Online Zoom meeting |
Semigroups, Automata and Languages

Combinatorial results for order-preserving partial injective contraction mappings

Let $I_n$ be the symmetric inverse semigroup on \$…

Speaker: Georg Klein
Online Zoom meeting |
Semigroups, Automata and Languages

Representations and identities of plactic-like monoids

Finite rank plactic monoids are infinite monoids arising from a natural combinatorial…

Speaker: Marianne Johnson
Online Zoom meeting |
Semigroups, Automata and Languages

How to prove that a language is regular or star-free?

The class of regular languages is the smallest class of languages containing the finite…

Speaker: Jean-Eric Pin
Online Zoom meeting |
Semigroups, Automata and Languages

A Combinatorial Description for DAb

The variety (of finite semigroups) DAb is the class of finite semigroups whose regular 𝒟-classes…

Speaker: Jan Philipp Wächter