Abstract
We study some aspects of the geometry of complete spacelike hypersurfaces immersed into a pp-wave spacetime, namely, into a connected Lorentzian manifold admitting a parallel lightlike vector field. Initially, by applying suitable versions of the classical Hopf and Stokes theorems and a criterion of parabolicity for complete Riemannian manifolds, we obtain sufficient conditions which guarantee that a complete spacelike hypersurface is either maximal, 1-maximal or totally geodesic. As a consequence of these results, we also establish some results of nonexistence concerning such spacelike hypersurfaces. Finally, considering constant mean curvature closed spacelike hypersurfaces immersed in a pp-wave spacetime, we study a notion of stability via the first nonzero eigenvalue of the Laplacian.
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Acknowledgements
The authors would like to thank the referees for their comments and suggestions, which enabled them to reach at a considerable improvement of the original version of this paper. The first author is partially supported by CNPq, Brazil, Grant 311224/2018-0. The second author is partially supported by CNPq, Brazil, Grant 301970/2019-0.
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Velásquez, M.A.L., Lima, H.F.d. Complete spacelike hypersurfaces immersed in pp-wave spacetimes. Gen Relativ Gravit 52, 41 (2020). https://doi.org/10.1007/s10714-020-02692-0
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DOI: https://doi.org/10.1007/s10714-020-02692-0
Keywords
- pp-wave spacetimes
- Complete spacelike hypersurfaces
- Mean curvature
- Uniqueness and nonexistence results
- Stable closed spacelike hypersurfaces