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In this paper, we study n-dimensional complete minimal hypersurfaces in a hyperbolic space H^n+1 (-1) of constant curvature -1. We prove that a 3-dimensional complete minimal hypersurface with constant scalar curvature in H^4 (-1) satisfies S 2129 by making use of the Generalized Maximum Principle, where S denotes the squared norm of the second fundamental form of the hypersurface.
Cheng et al. (Sun,) studied this question.