Feedback-invariant optimal control theory and differential geometry. II. Jacobi curves for singular extremals
This paper contains some important results on Jacobi curves for singular extremals of smooth control systems. The last section is dedicated to a feedback classification and normal forms of generic single-input, affine in control systems on a 3-dimensional manifold. [For Part I see \textit{A. A. Agrachev} and \textit{R. V. Gamkrelidze}, J. Dyn. Control Syst. 4, No. 4, 583-604 (1998; Zbl 0952.49019)].
scientific article; zbMATH DE number 1431868