Microscopic Aspects of Nonlinearity in Condensed Matter : Springer : 9781468459630 : 1468459635 : 25 Feb 2012 : The collection of articles in this volume represents the proceedings of the inau­ gural Conference of the Institute of Theoretical Matter Physics at the University of Florence, Italy, June 7-13, 1990. The aim of this Institute (sponsored by the Con­ sorzio Interuniversitario di Fisica della Materia, INFM) is to foster interdisciplinary approaches to theoretical problems in Solid State, Electronics and Optics. Corre­ spondingly, the Conference surveyed a broad scope of modern analytic techniques in nonlinear science and their application to novel liquids, solids and optical environ­ ments. The Conference was held at Centro Studi CISL, a magnificent Villa up to Florence. The major topics addressed through survey and specialized lectures, discussions and posters were: Complexity and Coherence in spin glasses, associative distribu­ tive memory, low dimensional electronic material