Bibliogr. en fin de chapitres

I, Introduction 2, Brownian movement in a field of force III, Macromolecules IV, Path integrals with topological constraints: polymer entanglements, knots and links V, Quantum physics VI, Classical statistical physics VII, Quantum Statistical physics VIII, Approximate theories of the interacting bose fluid and the vortex-ring model for the lambda transition IX, Renormalization group theory of the interacting bose fluid X, Path integrals and the holistic approach to theoretical physics