Abstract
A well-known conjecture of Bang-Yen Chen says that the only biharmonic Euclidean submanifolds are minimal ones, which affirmed by himself for surfaces in 3-dimensional Euclidean space, EÂł. We consider an extended version of Chen conjecture (namely, Lk-conjecture) on Lorentzian hypersurfaces of the pseudo-Euclidean space EâŽâ (i.e. the Einstein space). The biconservative submanifolds in the Euclidean spaces are submanifolds with conservative stress-energy with respect to the bienergy functional. In this paper, we consider an extended condition (namely, Lk-biconservativity) on non-degenerate timelike hypersurfaces of the Einstein space EâŽâ . A Lorentzian hypersurface x : MÂłâ â EâŽâ is called Lk-biconservative if the tangent part of LÂČk x vanishes identically. We show that Lk-biconservativity of a timelike hypersurface of EâŽâ (with constant kth mean curvature and some additional conditions) implies that its (k + 1) th mean curvature is constant.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have