Lโ{128}{153}interpolation des Fonctions Diffรฉrentiables de Plusteurs Variables -- Normal forms for analytic matrix valued functions -- Geometric aspects of the singular solutions of certain differential equations -- Morse relations for curvature and tightness -- Blowing up singularities -- Singularities in the differential geometry of submanifolds -- A proof of a conjecture of loewner and of the caratheodory conjecture concerning umbilic points -- Geometric singularities -- Remark on geometric singularities -- Geometric differentiation โ{128}{148} A thomist view of differential geometry -- Lectures on the theorem of gromov -- Formes de Contact sur les Variรฉtรฉs de Dimension 3 -- Algebraic invariants for pseudo-isotopies -- Reflections on gradient vector fields -- Singularities in spaces -- Pontrjagin classes of rational homology manifolds and the signature of some affine hypersurfaces -- Topology of isolated singularities of complex spaces -- Deformations Equisinguliรจres des Idรฉaux Jacobiens de Courbes Planes -- Non-singular deformations of singular spaces with normal crossings -- Singularities in relativistic quantum mechanics -- Landau singularities and a problem in graph theory -- The definition and occurrence of singularities in general relativity