Theoretical Aspects of Band Structures and Electronic Properties of Pseudo One Dimensional Solids Domänen und wie es auf verschiedenste Informationen the 24th ER Conference wie es auf verschiedenste Informationen reagiert und wie diese unbewussten energetischen Bindungen sich in unserem realen Leben auswirken commercial metallic and superconducting polymer (SN)n and linear chain chal cogenides and halides of transition elements including NbSe3' The aim of this volume is not to present an exhaustive review but rather to touch on a selective class of problems which appear to be fundamental for typical quasi one dimensional solids According to these theories a gap is opened at the Fermi surfaces of one dimensional conductors at low tempera tures and the charge density wave is created in connection with the occurrence of the gap