Table of contents : L’interpolation des Fonctions Différentiables de Plusteurs Variables....Pages 1-33 Normal forms for analytic matrix valued functions....Pages 34-57 Geometric aspects of the singular solutions of certain differential equations....Pages 58-76 Morse relations for curvature and tightness....Pages 77-89 Blowing up singularities....Pages 90-103 Singularities in the differential geometry of submanifolds....Pages 104-113 A proof of a conjecture of loewner and of the caratheodory conjecture concerning umbilic points....Pages 114-117 Geometric singularities....Pages 118-120 Remark on geometric singularities....Pages 121-121 Geometric differentiation — A thomist view of differential geometry....Pages 122-127 Lectures on the theorem of gromov....Pages 128-141 Formes de Contact sur les Variétés de Dimension 3....Pages 142-163 Algebraic invariants for pseudo-isotopies....Pages 164-190 Reflections on gradient vector fields....Pages 191-195 Singularities in spaces....Pages 196-206 Pontrjagin classes of rational homology manifolds and the signature of some affine hypersurfaces....Pages 207-212 Topology of isolated singularities of complex spaces....Pages 213-217 Deformations Equisingulières des Idéaux Jacobiens de Courbes Planes....Pages 218-233 Non-singular deformations of singular spaces with normal crossings....Pages 234-243 Singularities in relativistic quantum mechanics....Pages 244-269 Landau singularities and a problem in graph theory....Pages 270-274 The definition and occurrence of singularities in general relativity....Pages 275-279