The articles in this volume are an outgrowth of a colloquium "Systemes Integrables et Feuilletages," which was held in honor of the sixtieth birthday of Pierre Molino.

The topics cover the broad range of mathematical areas which were of keen interest to Molino, namely, integral systems and more generally symplectic geometry and Poisson structures, foliations and Lie transverse structures, transitive structures, and classification problems.

Inhalt
Orbites des structures rigides (d'après M. Gromov).- On the Betti Numbers of Nilpotent Lie Algebras of Small Dimension.- Réalisations feuilletées de quelques pseudogroupes.- A Morse Theoretic Proof of Poisson Lie Convexity.- Sur l'uniformisation des laminations paraboliques.- Extensions essentielles privilégiées d'algèbres de Lie classiques de dimension infinie.- Holonomy Groups of Solvable Lie Foliations.- On the Weak Homotopy Type of Étale Groupoids.- Classification globale des formes différentielles transitives sur la sphère S5.- A Lecture on PoissonNijenhuis Structures.- Integrable Hamiltonian Systems Associated to Families of Curves and Their Bi-Hamiltonian Structure.