Differential Forms, Cycles and Hodge Theory on Complex Analytic Spaces -- On Exact Solutions of Linear PDEs -- Necessary Conditions for Hyperbolic Systems -- Monodromy of the Ramified Cauchy Problem -- Nonlinear Stability of an Expanding Universe with S1Isometry Group -- On the Cauchy Problem for a Weakly Hyperbolic Operator: An Intermediate Case between Effective Hyperbolicy and Levi Condition -- Symplectic Path Intersections and the Leray Index -- A Global Cauchy-Kowalewski Theorem in Some Gevrey Classes -- Sub-Riemannian Geometry and Subelliptic PDEs -- On the Analytic Continuation of the Solution of the Cauchy Problem -- Strong Gevrey Solvability for a System of Linear Partial Differential Equations -- Spherically Symmetric Solutions of the Compressible Euler Equation -- Hyperbolic Cauchy Problem Well Posed in the Class of Gevrey -- Absence of Eigenvalues of Dirac Type Operators -- The Behaviors of Singular Solutions of Partial Differential Equations in Some Class in the Complex Domain -- Systèmes Uniformément Diagonalisables, Dimension Réduite et Symétrie II -- On Hypoellipticity of the Operator exp $$ \left[ { - {{\left/ {{x_1}} \right/}^{ - \delta }}} \right]D_1^2 + x_1^4D_2^2 + 1 $$.