Propagation des singularites des solutions d’equations analogues a l’equation de Schrödinger -- On the spectrum of positive elliptic operators and periodic bicharacteristics -- Clean intersection theory and Fourier Integrals -- Non-uniqueness for the Cauchy Problem -- Solutions asymptotiques et groupe symplectique -- Le polynome de Bernstein d’une singularite isolee -- Fourier integral operators with complex-valued phase functions -- On a problem of Hans Lewy -- On structures of L2-well-posed mixed problems for hyperbolic operators -- Applications of fourier distributions with complex phase functions -- Second-order fuchsian elliptic equations and eigenvalue asymptotics -- On Maslov’s quantization condition.