On flat surfaces in \(S_1^3\) and \(H_1^3\). (English) Zbl 0485.53047
Manifolds and Lie groups, Pap. in Honor of Y. Matsushima, Prog. Math. 14, 71-108 (1981).
MSC:
53C50 | Global differential geometry of Lorentz manifolds, manifolds with indefinite metrics |
53C42 | Differential geometry of immersions (minimal, prescribed curvature, tight, etc.) |
53C40 | Global submanifolds |