# Seminars

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
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 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

Let $I_n$ be the symmetric inverse semigroup on $… Speaker: Georg Klein Online Zoom meeting | Semigroups, Automata and Languages ### Representations and identities of plactic-like monoids Finite rank plactic monoids are infinite monoids arising from a natural combinatorial… Speaker: Marianne Johnson Online Zoom meeting | Semigroups, Automata and Languages ### How to prove that a language is regular or star-free? The class of regular languages is the smallest class of languages containing the finite… Speaker: Jean-Eric Pin Online Zoom meeting | Semigroups, Automata and Languages ### A Combinatorial Description for DAb The variety (of finite semigroups) DAb is the class of finite semigroups whose regular 𝒟-classes… Speaker: Jan Philipp Wächter FC1.031 | Dynamical Systems ### Holder continuity for Lyapunov exponents of random linear cocycles In 2017, Baraviera and Duarte extended a classical theorem from Le Page. Speaker: Marcelo Durães FC1.031 | Dynamical Systems ### Uniform convergence rate for Birkhoff means of certain uniquely ergodic toral maps In this talk, we will present an estimate on the uniform convergence rate of the Birkhoff… Speaker: Aline Melo Online Zoom meeting | Semigroups, Automata and Languages ### The Finite Index Basis Theorem The Finite Index Basis Theorem is an elegant result connecting bifix codes, symbolic dynamical… Speaker: Alfredo Costa FC1.031 | Dynamical Systems ### On Ergodic Theory of Impulsive Semiflows Impulsive Dynamical Systems (IDS) can be seen as suitable mathematical models of real… Speaker: Jaqueline Siqueira FC1.004 | CMUP Informal PHD Seminar ### On The Zeros of a Class of Dirichlet series Let$Q(x,y)=ax^{2}+bxy+cy^{2}\$ be a real and positive definite quadratic form. The classical…

Speaker: Pedro Ribeiro