On the theory of Gorenstein dimension with respect to a semidualizing module.

Abstract

This work studies the notions of k-torsionless modules and reduced G-perfect modules in a more general setting, relative to a semidualizing module. We consider various aspects and obtain new characterizations of these properties, which led us to generalize previous results by several authors. As a special application, we investigate the Cohen- Macaulayness, under certain conditions, on a celebrated module in both algebra and geometry: the module of derivations. Finally, the intersection of the two main general classes of modules worked out in this thesis is taken into account and exemplified.