×

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