Nonautonomous linear Hamiltonian systems.- The rotation number and the Lyapunov index for real nonautonomous linear Hamiltonian systems.- The Floquet coeffcient for nonautonomous linear Hamiltonian systems: Atkinson problems.- The Weyl functions.- Weak disconjugacy for linear Hamiltonian systems.- Nonautonomous control theory. Linear regulator problem and the Kalman-Bucy filter.- Nonautonomous control theory. A general version of the Yakubovich...