In this paper, we study complete minimal hypersurfaces in Riemannian \(n\) -manifolds \({\mathcal {M}}^n\) for dimensions \(4 \le n \le 7\) , and we obtain some results in the spirit of known work for \(n=3\) . Key contributions include extending the work of Anderson and Rodríguez to higher dimensions. Specifically, we show that in four dimensional manifolds with nonnegative sectional curvature and positive scalar curvature, two disjoint properly embedded minimal hypersurfaces bound a slab isometric to the product of one hypersurface with an interval. Our results are grounded on a maximum principle at infinity for two-sided, parabolic, properly embedded minimal hypersurfaces in complete Riemannian manifolds of bounded geometry, generalizing the work of Mazet in dimension three to higher dimensions. We also leverage the recent classification of complete two-sided stable minimal hypersurfaces by Chodosh, Li, and Stryker.
