Álgebras de Koszul e resoluções projetivas

Abstract

In this work we study some features of Koszul algebras as, for example, the way that they are related with their Yoneda algebras. We describe the Yoneda algebra of a monomial algebra and as an application we construct a family of algebras: the so called homologically self-dual algebras. A Koszul algebra can be dened as an algebra for which there are linear resolutions of their simple modules. Because of this we dedicate part of our attention to the study of projective resolutions. The study of methods for the construction of projectives resolutions of modules over quotients of path algebras, has an of interest its own. For the study of projective resolutions we used the theory of noncommutative, Gröbner bases. Finally, for the case of linear modules over Koszul algebras, we will see that it is possible to modify the general construction described here, so that the resulting resolution is linear.