Seminars

Using graphs as a tool to encode properties of groups is a well established approach to many…

A numerical semigroup $S$ is a cofinite…

Let G be a permutation group acting on a finite set Ω. A subset B of Ω is…

A language of finite words is star-free when it can be built from letters using Boolean…

A Steiner triple system STS(v) is a set of triples of {1, 2, . . . , v} such that every pair of…

If G is a finite group and k a field of characteristic p, the group algebra kG can be written…

We consider the rational subset membership problem for Baumslag-Solitar groups.

Boolean inverse monoids and $MV$-algebras are both supposed to be generalizations of Boolean…

If $R$ is a finite commutative ring, then the affine monoid of…

Building on the classification of modules for algebraic groups with finitely many orbits on…

We consider a natural generalization of the concept of order of a (torsion) element: the order…

A central polynomial of an algebra A is a polynomial f in non-commutative…

Classical Morita theory was first developed for rings with identity by Kiiti Morita.

Normality has been introduced by É. Borel more than one hundred…

Riemann surfaces are the simplest spaces to which one can extend the tech…

Profinite groups in which the centralizer of any non-identity element  is abelian (i.e.,…

We provide a general framework for computing mixing times of finite Markov chains when its…

Given an extension L/K of number fields, we say that the Hasse norm principle (HNP) holds if…

The multiplicative semigroup $M_n(F)$ of $n\times n$ matrices over a field $F$ is well…

This talk is about some special type of profinite presentations called ω-presentations…