Some applications of the coarea formula to partial differential equations, F. Bethuel and J.M. Ghidaglia; optical Hamiltonian functions, M. Bialy and L. Polterovich; topological obstructions for singular solutions of differential equations, I. Bogaevski and A. Rachimov; minimal surfaces in economic theory, J. Donato; asymptotic expansions in spectral geometry, P.B. Gilkey; s-symmetries of differential equations, D. Gourevitch; deformations and recursion operators for evolution equations, I.S. Krasil'shchik and P.H.M. Kersten; geometric Hamiltonian forms for the Kadomtsev-Petviashvili and Zabolotskaya-Khokhlov equations, B.A. Kupershmidt; singularities, connections and generalized Dirac equations, V. Lychangin and L. Zilbergleit; Hawking's radiation via Fourier integral operators, P.E. Parker; geometry of super PDEs, A. Prastaro; the isoperimetric inequality, Th.M. Rassias; smooth marginal analysis of bifurcation of extremals, Y.I. Sapronov; on the Schrodinger equation for an n-electron atomic, C.S. Sharma; strings and membranes, K.S. Stelle.
