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TITLE Rigidity results of free boundary maximal hypersurfaces in the region bounded by a de Sitter space
KIAS AUTHORS Pyo, Juncheol,Park, Sangwoo
JOURNAL CLASSICAL AND QUANTUM GRAVITY, 2020
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ABSTRACT This paper provides the rigidity results of free boundary maximal hypersurfaces in a region bounded by a de Sitter space in the Lorentz-Minkowski space. First, it is proved that any smooth, compact free boundary maximal hypersurface in a de Sitter ball is the spacelike coordinate planar disk passing through the center of the de Sitter space. Second, a smooth, noncompact, complete free boundary maximal hypersurface in the exterior of a de Sitter ball is considered. For maximal hypersurfaces with one planar end in the exterior of a de Sitter ball, every complete noncompact free boundary maximal hypersurface is shown to be a part of the spacelike coordinate hyperplane.
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