This volume contains papers presented at the Fifth Taniguchi Symposium
on the Theory of Condensed Matter, which was held between 2-5 November,
1982, at Shimoda, Japan. The topic of the Symposium was "Topological
Disorder in Condensed Matter. " The objective of the Taniguchi Symposium
is to encourage activity in those fields of research not in the
limelight at the moment but regarded as very promising, such as our
theme. Topological disorder refers to the dis- order in the positions
and connectivities of atoms in amorphous solids and liquids. The
development of the physiCS of topologically disorderd systems, though
extremely important fundamentally and for application purposes, falls
far behind compared to that of other kinds of disorderd systems because
the structure characterization of topologically disordered systems is
still at a rather primitive stage. The structure characterization is the
key to com- prehensive understanding of physical properties of any
material. Recently, several new attempts at structural analyses have
been reported. Encouraged by this fact, our motivation in organizing the
symposium was to investigate the possibilities of theoretical approaches
to open a breakthrough in the present research situation on this
subject. A rough sketch of the problem is made in the Introduction to
give the readers a general outline of the subject. Part I is devoted to
several at- tempts to synthesize and characterize topological disorder
more or less by analytical means.