Periodic Solutions of Singular Dynamical Systems.- Pseudo-Orbits of Contact Forms.- Some Applications of the Morse-Conley Theory to the Study of Periodic Solutions of Second Order Conservative Systems.- A "Birkhoff-Lewis" Type Result for Nonautonomous Hamiltonian Systems.- A Remark on A Priori Bounds and Existence for Periodic Solutions of Hamiltonian Systems.- On a Class of Nonlinear Problems with Lack of Compactness.- An Old-Fashioned Method in the Calculus of Variations.- Optimization and Periodic Trajectories.- Periodic Solutions of Dynamical Systems with Newtonian Type Potentials.- Families of Periodic Solutions Near Equilibrium.- Viterbo's Proof of Weinstein's Conjecture in R2n.- Global and Local Invariants for Convex Energy Surfaces and Their Periodic Trajectories: A Survey.- Viterbo's Index and the Morse Index for the Symplectic Action.- Some Problems on the Hamilton-Jacobi Equation.- Some Results on Periodic Solutions of Mountain Pass Type for Hamiltonian Systems.- Remarks on Periodic Solutions for Some Dynamical Systems with Singularities.- Cauchy-Riemann Equation in Lagrange Intersection Theory.- Modulus of Continuity for Peierls's Barrier.- Chaotic Orbits in the Three Body Problem.- On the Construction of Invariant Curves and Mather Sets via a Regularized Variational Principle.- The Obstruction Method and Some Numerical Experiments Related to the Standard Map.- On a Theorem of Hofer and Zehnder.- The Value Function of a Modified Jacobi Functional.- Perturbations of Nondegenerate Periodic Orbits of Hamiltonian Systems.- Remarks on Periodic Solutions on Hypersurfaces.