Extension d'homéomorphismes CR entre variétés polynômialement rigides.
Let f : M → M' be a CR homeomorphism between two minimal, rigid polynomial varieties of C without holomorphic curves. We show that f extends biholomorphically in a neighborhood of M if f extends holomorphically in a neighborghood of a point p ∈ M or if f is of class C. In the other hand, in case M and M' are two algebraic hypersurfaces, we obtain the extension without supplementary conditions.