One chilly early October morning, the body of a newspaper carrier is found brutally mutilated. He's the first of more killing to stump the detectives of the Sullivan Sheriff's Office.
This book originated from a course given at the Univcrsidad Aut6noma of Madrid in the Spring of 1994 and in the Universidad Complutense of Madrid in 1995. The goal of these courses is to give the non-specialist an introduction to some old and new ideas in the field of strongly correlated systems, in particular the problems posed by the high-1~ superconducting materials. As theoretical physicists, our starting viewpoint to address the problem o...
