Trends in Theoretical Physics II Buenos Aires, Argentina, 29 November - 4 December 1998

The conference addressed professionals in different areas of theoretical physics. Highlights were: last developments in string theory, particularly the connection Ads - CFT was discussed. The conjecture was exposed by Maldacena and his original work is reprinted in this volume. The well-honored Chern-Simons Theory was carefully presented, as well as the uses of zeta-function methods in physics and mathematics. Also discussed were gravitation and cosmology models.Additional important topics were: supersymmetry, supergravity, duality, cosmology; frustrated, disordered and out of equilibrium systems.