Abstract
We study hypersurfaces in the pseudo-Euclidean space, whose mean curvature vector satisfies the equation: Laplacian of the vector is parallel to the vector (with constant factor), and the second fundamental form has constant norm. We prove that every such hypersurface of diagonalizable shape operator with at most six distinct principal curvatures has constant mean curvature and constant scalar curvature, and if the above factor is zero then the hypersurface is minimal. We classify locally such non-minimal hypersurfaces with extremal value of the norm of the mean curvature vector. Further, we provide some examples of such hypersurfaces.
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Acknowledgements
This work was supported by award of grant under FRGS for the year 2016–17, F.No. GGSIPU/DRC/Ph.D./Adm./2016/1555. The author is thankful to Prof. Vladimir Rovenski, Dept. of Mathematics, University of Haifa, Mount Carmel, 31905 Haifa, Israel, for many valuable discussions and contributions for the improvement of the manuscript. Also, the author is grateful to reviewers for their numerous suggestions for improvement of the manuscript.
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Communicated by Young Jin Suh.
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Gupta, R.S. Hypersurfaces in Pseudo-Euclidean Space with Condition \(\triangle \mathbf{H }=\lambda \mathbf{H }\). Bull. Malays. Math. Sci. Soc. 44, 3019–3042 (2021). https://doi.org/10.1007/s40840-021-01098-8
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DOI: https://doi.org/10.1007/s40840-021-01098-8