Issue no. 1 Table of Contents

On the infrared problem in a model of scalar electrons and massless, scalar bosons
p. 1-103

Issue no. 2 Table of Contents

Time operators, position operators, dilatation transformations and virtual particles in relativistic and nonrelativistic quantum mechanics
p. 105-169
On integrability of discrete representations of Lie algebra u(p,q)
p. 171-177
Spin and the structure of space-time
p. 179-196
Bianchi universes admitting full groups of motions
p. 197-210

Issue no. 3 Table of Contents

The role of locality in perturbation theory
p. 211-295

Issue no. 4 Table of Contents

Algebra of observables and quantum logic
p. 297-331
The lattice structure of quantum logics
p. 333-340
A theory of relativistic unstable particles
p. 341-356
A generalization of entropy using traces on von Neumann algebras
p. 357-373
Mori's memory function formalism in nonlinear statistical hydrodynamics
p. 375-386