A reduced word for a permutation of the symmetric group is its own commutation class if it has…
Seminars
Future and Ongoing Seminars
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
Speaker: Diogo Soares
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
We introduce the concept of a nonassociative (i.e. not necessarily associative) inverse…
Speaker: Mikhailo Dokuchaev
Online |
Geometry and Topology
I will present recent joint work with Jérémy Toulisse and Richard Wentworth on a differential…
Speaker: Brian Collier
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
In the 1950’s Davenport, Mirsky, Newman and Rado proved that if the integers are partitioned by…
Speaker: Martino Garonzi
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
The Gruenberg-Kegel graph of a group is defined as the graph whose vertices are the primes that…
Speaker: Diego Lucas Garcia
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
Past Seminars
Online Zoom meeting |
Semigroups, Automata and Languages
It is well-known that the subword complexity of an automatic sequence grows at most linearly,…
Speaker: Jakub Konieczny
Online seminar |
Algebra, Combinatorics and Number Theory
Given a group $G$ acting on a set $X$, an element $g$ of $G$ is called a derangement if it…
Speaker: Daniele Garzoni
Online Zoom meeting |
Semigroups, Automata and Languages
Since the seminal work of Nambooripad (among others), people…
Speaker: Xavier Mary
FC1 007 |
Algebra, Combinatorics and Number Theory
The length of a finite system of generators for a finite-dimensional algebra over a field is the…
Speaker: Alexander Guterman
FC1 .029 |
Geometry and Topology
In this talk, we will study a gauge-theoretic construction of (branched) complex projective …
Speaker: Pedro M. Silva
FC1 007 |
Algebra, Combinatorics and Number Theory
The simple positive energy representations for an affine vertex algebras associated to higher…
Speaker: Oscar Morales
FC1 007 |
Algebra, Combinatorics and Number Theory
In 1972, Kantor introduced the class of conservative algebras, which contains many other…
Speaker: Renato Fehlberg Júnior
FC1 0.29 |
Geometry and Topology
Mirror symmetry is a somewhat mysterious phenomenon that relates the geometry of two distinct…
Speaker: Goncalo Oliveira
FC1.031 |
Dynamical Systems
The variational principle states that the topological entropy of a compact dynamical system is…
Speaker: Reza Mohammadpour
Online Zoom meeting |
Semigroups, Automata and Languages
We introduce the notion of a crossed module over an inverse semigroup which generalizes…
Speaker: Mykola Khrypchenko
FC1 007 (and online) |
Algebra, Combinatorics and Number Theory
I will present some results that were obtained in collaboration with Csaba Schneider (…
Speaker: Raimundo de Araújo Bastos Júnior
Online Zoom meeting |
Geometry and Topology
In this talk, I will discuss recent joint work with Alexeev-Engel-Schaffler that provides…
Speaker: Daniel Zachary Garza
FC1 007 |
Algebra, Combinatorics and Number Theory
Let $A$ be an associative algebra over a field $F$ of characteristic zero, $F\langle X \rangle$…
Speaker: Carla Rizzo
FC1 007 |
Algebra, Combinatorics and Number Theory
Given a group $G$ and a partial factor set $\sigma $ of $G,$ we introduce the twisted partial…
Speaker: Mikhailo Dokuchaev
Online Zoom meeting |
Geometry and Topology
I will explain how to express the space of almost complex structures J(M) on a…
Speaker: Gustavo Granja
FC1 0.31 and online |
Analysis
The recurrence coefficients of a generalised symmetric F…
Speaker: Ana Filipa Loureiro
FC1 007 |
Algebra, Combinatorics and Number Theory
The Monster group $M$ is the largest sporadic simple group. It is also the group of…
Speaker: Albert Gevorgyan
FC1 004, (Math Bldg., FCUP) |
Semigroups, Automata and Languages
Finite automata are classical machines that recognise regular languages. However, many other…
Speaker: Luca Prigioniero
FC1.031 |
Dynamical Systems
This presentation is divided into three parts where we analyze three different…
Speaker: João Carvalho
Online |
Geometry and Topology
A twisted rational map over an algebraically closed and complete non-…
Speaker: Shengyuan Zhao