Singularities of sub-Riemannian exponential mappings, conjugate loci (caustics), wave fronts, cut loci and Carnot-Caratheodory small-balls (Recent results by Agrachev, El-Alaoui, Gauthier, Ge and Kupka)
- Publication date
- 1 August 1997
- Publisher
- 京都大学数理解析研究所