Issue no. 1 Table of Contents

Scattering theory for one-dimensional step potentials
Développement multipolaire des fonctions de vertex dans un référentiel arbitraire
Développement multipolaire des fonctions de vertex à deux particules finales
Mass singularities of generic Feynman amplitudes
Addendum to “Rigorous absolute bounds for pion-pion scattering. II. Solving modified Szegö-Meiman problems”

Issue no. 2 Table of Contents

Models for infrared dynamics. I. Classical currents
Théorie de la diffusion pour l'équation de sinus-Gordon à trois dimensions
Induction from a normal nilpotent subgroup
Multiple discontinuities for 2-to-4 processes
Complete positivity and asymptotic abelianness

Issue no. 3 Table of Contents

Applications de la méthode de Lavine au problème à trois corps
On the absolutely and singularly continuous subspaces in scattering theory
Wave operators for momentum dependent long range potential
A possible constructive approach to φ 4 4 . II
Schrödinger operators in the uniform norm
Covariant wave-equations, the Galilei group, and the magnetic moment of the electron
Addendum à « R. G. McLenaghan : on the validity of Huygens' principle for second order partial differential equations with four independent variables. I »

Issue no. 4 Table of Contents

Essential self-adjointness of many-particle hamiltonian operators of Schrödinger type with singular two-particle potentials
Potentiels sphéroïdaux pour l'équation de Schrœdinger. II. Bornes sur le nombre d'états liés
Asymptotic ℏ-expansions of stationary quantum states
On characteristic identities for Lie algebras