Andrei Agrachev

Differential geometry of optimal control problems and Hamiltonian systems


1. Hamiltonian systems and extremals of optimal control problems.
2. Jacobi curves associated with trajectories of Hamiltonian systems and with various types of extremals.
3. Elements of symplectic geometry: Lagrange Grassmannians, Maslov index, Cross-ratio.
4. Canonical connections and curvatures of  Hamiltonian systems and smooth control systems.
5. Geometry of Jacobi curves: their ranks, weights, derivative curves, curvatures, and fundamental forms. Flat curves.
6. "Comparizon theorems" for conjugate points.
7. Application to special classes of systems.