Chen, Erdős, and Staton asked in 1996 how many edges are required in an n-vertex graph to…
Seminars
Future and Ongoing Seminars
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
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 007 and Online |
Algebra, Combinatorics and Number Theory
The Hasse principle is the idea that a Diophantine equation over the rational numbers should…
Speaker: Nuno Freitas
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
Online Zoom meeting |
Research Seminar Program (UC|UP MATH PhD program)
Program of the session:
10h30-10h45 - Virtual Reception: André…
Online Zoom meeting |
Semigroups, Automata and Languages
We prove a noncommutative generalisation…
Speaker: Jean-Eric Pin
Online Zoom meeting |
Semigroups, Automata and Languages
We consider two-variable first-order logic $\mathop{\mathrm{FO}}^2$…
Speaker: Manfred Kufleitner
Online Zoom meeting |
Semigroups, Automata and Languages
It is a consequence of Higman's embedding theorem that the additive group $\mathbb{Q}$ of…
Speaker: Francesco Matucci
Online Zoom meeting |
Semigroups, Automata and Languages
The starting point for the ideas in this talk is that the Plactic monoid admits several…
Speaker: António Malheiro
Online Zoom meeting |
Semigroups, Automata and Languages
Since the 1980s, inverse semigroups and groupoids have been important tools to study $C^*$-…
Speaker: Gilles Gonçalves de Castro
Online Zoom meeting |
Semigroups, Automata and Languages
The problem of computing the abelian kernel of a finite semigroup was first solved by Delgado…
Speaker: Vicent Pérez Calabuig
FC1 0.31 |
Algebra, Combinatorics and Number Theory
In this series of three lectures, we will discuss two important and relatively new methods…
Speaker: António Girão
Online Zoom meeting |
Semigroups, Automata and Languages
Plactic monoids are infinite, finitely generated monoids arising from a natural combinatorial…
Speaker: Mark Kambites
FC1 0.31 |
Algebra, Combinatorics and Number Theory
In this series of three lectures, we will discuss two important and relatively new methods…
Speaker: António Girão
Online Zoom meeting |
Algebra and Geometry
Let C be a decomposable plane curve over an algebraically closed field k of characteristic 0.
Speaker: Angela Tabiri
Online Zoom meeting |
Semigroups, Automata and Languages
Automata pose a simple way to describe groups and semigroups with sometimes surprisingly complex…
Speaker: Jan Philipp Wächter
Online Zoom meeting |
Semigroups, Automata and Languages
In this talk, we consider the class of finite right restriction Ehresmann semigroups whose…
Speaker: Itamar Stein
Online Zoom meeting |
Semigroups, Automata and Languages
In our talk we will review some of the combinatorial methods in…
Speaker: Tatiana Jajcayova
Online Zoom meeting |
Semigroups, Automata and Languages
A self-similar group is a group $G$ acting on the Cayley graph of a finitely generated free…
Speaker: Benjamin Steinberg
Online Zoom meeting |
Semigroups, Automata and Languages
Free profinite semigroups are completions of free semigroups, and for that reason their elements…
Speaker: Alfredo Costa
Online Zoom meeting |
Semigroups, Automata and Languages
The ubiquitous plactic monoid, also known as the monoid of Young tableaux, has deep connections…
Speaker: Duarte Chambel Ribeiro
Online Zoom meeting |
Semigroups, Automata and Languages
The aim of this talk is to explain how model theory can be fruitfully applied to the study of…
Speaker: Samuel J. van Gool
Room FC1 030, DMat-FCUP |
Semigroups, Automata and Languages
Two groups are called commensurable if they have isomorphic subgroups of finite index.
Speaker: Zakharov Alexander
Room 1.09 |
Geometry and Topology
Hitchin's connection, originally constructed using techniques of Kähler geometry, is a flat…
Speaker: Thomas Baier