In the 1950’s Davenport, Mirsky, Newman and Rado proved that if the integers are partitioned by…
Seminars
Future and Ongoing Seminars
FC1 007 and Online |
Algebra, Combinatorics and Number Theory
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 007 and Online |
Algebra, Combinatorics and Number Theory
Chen, Erdős, and Staton asked in 1996 how many edges are required in an n-vertex graph to…
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 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
FC1.031 |
CMUP Informal PHD Seminar
Rational and recognizable subsets of groups are part of an important connection between the…
Speaker: André Carvalho
Room 1.19 |
Geometry and Topology
For some classes of hyperbolic surfaces, all locally finite ergodic measures invariant under…
Speaker: DR. Cheikh lo
FC1 030 |
Algebra, Combinatorics and Number Theory
In this talk, an overview will be presented about hom-algebra structures, with focus on…
Speaker: Sergei Silvestrov
Online Zoom meeting |
Semigroups, Automata and Languages
In this talk I will present a certain hierarchy of diagrammatic monoids which can be unified by…
Speaker: Volodymyr Mazorchuk
FC1 030 |
Algebra, Combinatorics and Number Theory
Hypercubes are arguably one of the most fundamental and most studied objects in Combinatorics.…
Speaker: António Girão
Room 1.20 |
Geometry and Topology
Compact Hyperkaeler manifolds play a central role in complex algebraic geometry, as they arise…
Speaker: Valeria Bertini
Room M030, DMat-FCUP |
Computational Mathematics
Abstract
Speaker: Maria Bras-Amorós
Online Zoom meeting |
Semigroups, Automata and Languages
The study of the subgroup fixed by an automorphism of a free group started with the work of…
Speaker: André Carvalho
Online Zoom meeting |
Semigroups, Automata and Languages
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
In dimension 2, a domino is a $2\times 1$ rectangle. Domino tilings of quadriculated regions…
Speaker: Nicolau Saldanha
1.09 |
Geometry and Topology
In 1975 Narasimhan and Ramanan studied the action of a line bundle $L$ of finite order on the…
Speaker: Guillermo Barajas Ayuso
Online Zoom meeting |
Semigroups, Automata and Languages
Following a correspondence due to Almeida, every uniformly recurrent language determines a…
Speaker: Herman Goulet-Ouellet
online |
Geometry and Topology
Abstract. In this talk we will focus on semicomplete Halphen vector fields.
Speaker: Ahmed Elshafei
Online Zoom meeting |
Semigroups, Automata and Languages
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
Finite rank plactic monoids are infinite monoids arising from a natural combinatorial…
Speaker: Marianne Johnson
Online Zoom meeting |
Semigroups, Automata and Languages
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
The variety (of finite semigroups) DAb is the class of finite semigroups whose regular 𝒟-classes…
Speaker: Jan Philipp Wächter
FC1.031 |
Dynamical Systems
In 2017, Baraviera and Duarte extended a classical theorem from Le Page.
Speaker: Marcelo Durães
Online Zoom meeting |
Semigroups, Automata and Languages
The Finite Index Basis Theorem is an elegant result connecting bifix codes, symbolic dynamical…
Speaker: Alfredo Costa