TITLE: On the fractalization of invariant curves AUTHORS: Angel Jorba, Joan Carles Tatjer Departament de Matematica Aplicada i Analisi. Universitat de Barcelona. Gran Via 585, 08007, Barcelona, Spain. E-Mails: angel@maia.ub.es, jcarles@maia.ub.es ABSTRACT: Let us consider a smooth discrete dynamical system such that one of the variables is a one-dimensional angle whose dynamics is a rigid Diophantine rotation. We assume that the system has an invariant curve whose rotation number is the rotation angle of the angular variable of the system. In this note we study the fractalization of the invariant curve in the context of bifurcation theory. This is a summary of a talk at the Equadiff meeting held in Hasselt, Belgium, July 22-26, 2003.