Gorenstien Projective Precovers

We consider a right coherent and left n-perfect ring R. We prove that the class of Gorenstein projective complexes is special precovering in the category of unbounded complexes, Ch(R). As a corollary, we show that the class of Gorenstein projective modules is special precovering over such a ring.  This is joint work with Sergio Estrada and Sinem Odabasi.

Title:  Introduction to Linkage

Abstract:  Liaison theory studies ideals by "linking" them to nicer ideals that are well understood, and so gaining some interesting information about the original ideals.  In this talk we will introduce some key ideas in liaison theory and apply them to the study of ideals generated by minors in a symmetric skew tableau. This will include some recent work with Uwe Nagel.