The concept of a rank function on an additive category with cokernels, or more generally, on one…
Seminars
Future and Ongoing Seminars
FC1 1.09 |
Geometry and Topology
Abstract: I will review the application of Hamiltonian flows in imaginary time to problems in…
Speaker: João Luís Pimentel Nunes
Past Seminars
Online seminar |
Algebra, Combinatorics and Number Theory
Let $k$ be an algebraicallly closed field of characteristic $p\geq 0$ and let $G$ be a linear…
Speaker: Ana Retegan
Online Zoom meeting |
Semigroups, Automata and Languages
We say that a regular semigroup $S$ is weakly generated by a set $X$ if it has no proper regular…
Speaker: Luís Oliveira
FC1.004 |
CMUP Informal PHD Seminar
Descent theory is the study of local-to-global problems. After a quick review of simple…
Speaker: Rui Prezado
Online seminar |
Algebra, Combinatorics and Number Theory
This talk concerns numerical semigroups, i.e. cofinite submonoids $S$ of $\mathbb{N…
Speaker: Shalom Eliahou
Online Zoom meeting |
Semigroups, Automata and Languages
In 1875, Smith computed the determinant of the $n\times n$…
Speaker: Benjamin Steinberg
Online seminar |
Algebra, Combinatorics and Number Theory
Let $G$ be a subgroup of $S_n$. What can be said on the number of conjugacy classes of $G$, in…
Speaker: Daniele Garzoni
Room TBD (FC1 Building) |
CMUP Informal PHD Seminar
Point vortices are singular solutions of the 2-dimensional incompressible Navier-Stokes…
Speaker: Gil Marques
Online seminar |
Two of the most important and fundamental results in the representation theory of a reductive…
Speaker: Jonathan Gruber
Online Zoom meeting |
Semigroups, Automata and Languages
The study of algebras of partial functions is an active area of research that investigates…
Speaker: Célia Borlido
Online seminar |
Algebra, Combinatorics and Number Theory
A celebrated theorem of B. H.
Speaker: Cristina Acciarri
FC1.029 |
CMUP Informal PHD Seminar
Coarse median spaces and groups were introduced by Bowditch in 2013.
Speaker: André Carvalho
Online Zoom meeting |
Semigroups, Automata and Languages
If $W$ is a set of words in the alphabet $\mathfrak…
Speaker: Olga B. Sapir
FC1.006 |
CMUP Informal PHD Seminar
In this talk we will discuss some problems on endomorphisms of groups with special focus…
Speaker: André Carvalho
Online seminar |
Algebra, Combinatorics and Number Theory
Using graphs as a tool to encode properties of groups is a well established approach to many…
Speaker: Daniele Nemmi
Online Zoom meeting |
Semigroups, Automata and Languages
A numerical semigroup $S$ is a cofinite…
Speaker: Manuel Delgado
Online seminar |
Algebra, Combinatorics and Number Theory
Let G be a permutation group acting on a finite set Ω. A subset B of Ω is…
Speaker: Mariapia Moscatiello
Online Zoom meeting |
Semigroups, Automata and Languages
A language of finite words is star-free when it can be built from letters using Boolean…
Speaker: Marc Zeitoun
Online seminar |
Algebra, Combinatorics and Number Theory
A Steiner triple system STS(v) is a set of triples of {1, 2, . . . , v} such that every pair of…
Speaker: Martino Garonzi
Online seminar |
Algebra, Combinatorics and Number Theory
If G is a finite group and k a field of characteristic p, the group algebra kG can be written…
Speaker: John MacQuarrie
Online Zoom meeting |
Semigroups, Automata and Languages
We consider the rational subset membership problem for Baumslag-Solitar groups.
Speaker: Georg Zetzsche