Introduction

Abstract

This issue of the Australian Journal of Physics and the preceding Festschrift Symposium on 'Electrons in Solids-The 1990s and Beyond', held at Monash University on Friday 11th December 1992, honours the career of Geoffrey Charles Fletcher, a distinguished theoretical physicist who celebrated his 70th birthday earlier in 1992. Geoff Fletcher has contributed to solid state physics in Australia for thirty-five years, the first eight being spent in the Department of Applied Mathematics at Sydney University and the rest at the Physics Department of Monash University. In both centres, Geoff has been a stimulating and willing helper to many of us.