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 seminar |
Algebra, Combinatorics and Number Theory
In this seminar we will talk about results concerning faithful representations of abelian groups…
Speaker: Bruno Zaban
Online Zoom meeting |
Geometry and Topology
In this talk I will explain a general mechanism, based on derived symplectic geometry, to glue…
Speaker: Marco Robalo
Online seminar |
Algebra, Combinatorics and Number Theory
Let $G$ be a group and consider the group $\chi(G)$ obtained from the free product $G \ast G$ by…
Speaker: Guilherme Rocha Ortega
Room FC1 1.09 |
Geometry and Topology
In physics, CS/WZNW duality is an equivalence between Chern–Simons gauge theory and WZNW…
Speaker: Tim Henke
online |
Geometry and Topology
Abstract: In this panoramic talk, we shall provide an…
Speaker: Alejandro Cabrera
Room FC1— 2.26 (Maths Bldg.) |
General seminar of CMUP
After a brief introduction to non-Euclidean 2D geometry using fleece surfaces (tecido…
Speaker: Jeff Weeks
FC1 031 |
Algebra, Combinatorics and Number Theory
The non-abelian tensor product $G \otimes H$ of groups G and H was
introduced by Brown and…
Speaker: Raimundo de Araújo Bastos Júnior
Online Zoom meeting |
Geometry and Topology
Given a flow on a manifold, how to perturb it in order to create a periodic orbit passing…
Speaker: Shira Tanny
FC1 007 |
We shall talk on conjugacy separability of standard arithmetic subgroups of a special orthogonal…
Speaker: Sheila Chagas
FC1 007 |
Algebra, Combinatorics and Number Theory
I shall discuss prosoluble subgroups of free profinite products towards a complete…
Speaker: Pavel Zalesskii
FC1 007 |
Algebra, Combinatorics and Number Theory
The ring of differential operators on a cuspidal curve whose coordinate ring is a numerical…
Speaker: Ulrich Krahmer
FC4 1.29 |
Geometry and Topology
Moduli spaces and moduli stacks of bundles depend on several parameters for their construction…
Speaker: David Alfaya Sánchez
FC1.036 |
Dynamical Systems
Oscillator networks, including neuronal ensembles, can exhibit multiple cooperative rhythms such…
Speaker: Igor Belykh
FC4 040 |
Algebra, Combinatorics and Number Theory
I will discuss some recent forays into some counting problems for free objects. I will focus on…
Speaker: Carl-Fredrik Nyberg Brodda
Online Zoom meeting |
Geometry and Topology
Calabi-Yau metrics can degenerate in a …
Speaker: Yang Li
Online Zoom meeting |
Semigroups, Automata and Languages
We will discuss solutions to Problems 6.4, 6.10, 6.21, and 6.22 from the paper "Four…
Speaker: Trevor Jack
FC1 0.29 |
Geometry and Topology
The rank versus genus conjecture, proposed by Waldhausen in 1978, asks whether the rank of the…
Speaker: António Salgueiro
Online Zoom meeting |
Semigroups, Automata and Languages
We deal with the question of the $\omega$-reducibility of pseudovarieties of ordered monoids.
Speaker: Jana Volaříková
FC1 0.29 |
Geometry and Topology
Given a free group F and…
Speaker: Claude Marion
FC1.031 |
Dynamical Systems
We study a class of one-dimensional full branch maps admitting two indifferent fixed points as…
Speaker: Mubarak Muhammad