• Tuesday, January 25, 14:00

    Fiorela Rossi Bertone (Universidad Nacional del Sur, Bahía Blanca), The Ext-algebra for infinitesimal deformations.

  • Abstract:
    Let f be a Hochschild 2-cocycle and Af an infinitesimal deformation of a finite dimensional k-algebra A. We describe, under some conditions on f, the algebra structure of the Ext-algebra of Af in terms of the Ext-algebra of A. We achieve this description by getting an explicit construction of minimal projective resolutions. This is based on ongoing joint work with M-J. Redondo and L. Román.