A fundamental problem in ring theory is to determine and describe ideal extensions of a given ring A

Let K be a field of positive characteristic p and KG the group algebra of a group G. It is known tha

Usando a noção de preunidade introduzida por Caenepeel and De Groot, apresentamos uma noção gera

We introduce a mapping from orientations to spanning trees in graphs, from regions to hyperplane ba

I shall talk about some new developments in the theory of coalgebra. In particular I will talk about

There are two natural notions of deformation applicable to N-Koszul algebras. First, such an algebr

The Goldie dimension of a module M is defined as the supremum of all cardinalities λ such that M c

Depth two is a nice little theory for subrings (reminiscent to and generalizing H-separable ring ext

It the first part of talk we will mention the definition and general informations on the Gelfand-Kir

A list of generators and relations offers a succinct presentation for an algebra over a field, but w