This book presents the technique of pseudodifferential operators and its applications, especially to the Dirac theory of quantum mechanics. The treatment uses "Leibniz' formulas" with integral remainders or as asymptotic series. A pseudodifferential operator may also be described by invariance under action of a Lie-group. The author discusses connections to the theory of C*-algebras, invariant algebras of pseudodifferential operators under hyperbolic evolution, and the relation of the hyperbolic theory to the propagation of maximal ideals.

The main aim of this book is to introduce the reader to the concept of comparison algebra, defined as a type of C*-algebra of singular integral operators.

Has violence changed over the centuries? Has it always held the same meanings for us?

Will it always be a given in society?

Taking the sociocultural long view, Violence in Europe analyzes the prevalence and role of violence from street crime to terrorist attacks, homicide to genocide in the evolution of human and national behaviour. The editors and 14 colleagues in history, anthropology, sociology, and psychology focus on Northern and Western Europe, examining centuries of violent phenomena, from the cultural logic of the Middle Ages to today s soccer riots and security...