Gorkavyy, V.O.; Nevmerzhitska, O.M.
(Журнал математической физики, анализа, геометрии, 2009)
Two-dimensional ruled surfaces in the spaces of constant curvature Rⁿ, Sⁿ, Hn and in the Riemannian products Sⁿ x R¹, Hⁿ x R¹ are considered. A ruled surface is proved to represent a pseudospherical congruence if and only ...