Rigidity theorems of $λ$-hypersurfaces

Since $n$-dimensional $λ$-hypersurfaces in the Euclidean space $\mathbb {R}^{n+1}$ are critical points of the weighted area functional for the weighted volume-preserving variations, in this paper, we study the rigidity properties of complete $λ$-hypersurfaces. We give a gap theorem of complete $λ$-hypersurfaces with polynomial area growth. By making use of the generalized maximum principle for $\mathcal L$ of $λ$-hypersurfaces, we prove a rigidity theorem of complete $λ$-hypersurfaces.

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