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 |
Dynamical Systems
This presentation is divided into three parts where we analyze three different…
Speaker: João Carvalho
FC1 004, (Math Bldg., FCUP) |
Semigroups, Automata and Languages
Finite automata are classical machines that recognise regular languages. However, many other…
Speaker: Luca Prigioniero
Online |
Geometry and Topology
A twisted rational map over an algebraically closed and complete non-…
Speaker: Shengyuan Zhao
FC1.031 |
Dynamical Systems
Apresentaremos o estado da arte sobre o estudo da conjectura da estabilidade para fluxos…
Speaker: Rafael Ruggiero
FC1.031 |
Dynamical Systems
The study of hyperbolic structures (uniform and nonuniform ones)
is a central subject in…
Speaker: Luciana Silva Salgado
Online Zoom meeting |
Geometry and Topology
We consider germs of holomorphic vector fields at the origin in dimension 3…
Speaker: Fernando Peirera Paulucio Reis
Online Zoom meeting |
Semigroups, Automata and Languages
Motivated by the recent surge of interest in the concept of injective C*…
Speaker: Ruy Exel
Online Zoom meeting |
Semigroups, Automata and Languages
This presentation will focus on extending the theory of formations of groups to inverse…
Speaker: Isabel J. Nobre
Online seminar |
Algebra, Combinatorics and Number Theory
A Kirkman Triple System (KTS) is called $m$-pyramidal if there exists a subgroup $G$ of its…
Speaker: Martino Garonzi
Seminário online |
Algebra, Combinatorics and Number Theory
Seguindo a ideia no artigo de Hu e Vercruysse [1], introduzimos morfismos parciais em uma…
Speaker: Francisco Gabriel Klock Campos Vidal
Seminário online |
Geometry and Topology
We consider germs of holomorphic vector fields at the origin in…
Speaker: Fernando Peirera Paulucio Reis
FC1 003 (and online) |
Algebra, Combinatorics and Number Theory
Let us consider the action of the general linear group $\mathrm{GL}_n(\mathbb{C})$ on the direct…
Speaker: Xabier García Martínez
FC1.031 |
Dynamical Systems
We show that quenched limiting hitting distributions are
compound Poisson distributed for…
Speaker: Lucas Amorim
Online seminar |
Algebra, Combinatorics and Number Theory
In this talk we present some properties of generalized torsion elements in groups.
Speaker: Raimundo de Araújo Bastos Júnior
Online Zoom meeting |
Geometry and Topology
We first investigate the interconnection of invariants of certain group actions and time-…
Speaker: Valerij Romanovskij
FC1 0.30 |
Geometry and Topology
Likelihood Geometry is the geometric study of the maximum likelihood estimation problem to an…
Speaker: Maximilian Wiesmann
Online Zoom meeting |
Semigroups, Automata and Languages
Numerical semigroups are the cofinite subsemigroups of the…
Speaker: Neeraj Kumar
Online seminar |
Algebra, Combinatorics and Number Theory
The Grassmann convexity conjecture by B. Shapiro and M. Shapiro admits
several equivalent…
Speaker: Nicolau Saldanha
Online Zoom meeting |
Geometry and Topology
Any Poisson bracket on a differentiable manifold can be written locally as the sum of two…
Speaker: Jorge Vitório Pereira
Online Zoom meeting |
Semigroups, Automata and Languages
In his paper from 2012, Nicolas Thiéry gives a formula for…
Speaker: Balthazar Charles