On $L_1$-biharmonic timelike hypersurfaces in pseudo-Euclidean space $E_1^4$

IF 0.7 Q2 MATHEMATICS Tamkang Journal of Mathematics Pub Date : 2020-11-01 DOI:10.5556/j.tkjm.51.2020.3188
F. Pashaie
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引用次数: 0

Abstract

A well-known conjecture of Bang Yen-Chen says that the only biharmonic Euclidean submanifolds are minimal ones. In this paper, we consider an extended condition (namely, $L_1$-biharmonicity) on non-degenerate timelike hypersurfaces of the pseudo-Euclidean space $E_1^4$. A Lorentzian hypersurface $x: M_1^3\rightarrow\E_1^4$ is called $L_1$-biharmonic if it satisfies the condition $L_1^2x=0$, where $L_1$ is the linearized operator associated to the first variation of 2-th mean curvature vector field on $M_1^3$. According to the multiplicities of principal curvatures, the $L_1$-extension of Chen's conjecture is affirmed for Lorentzian hypersurfaces with constant ordinary mean curvature in pseudo-Euclidean space $E_1^4$. Additionally, we show that there is no proper $L_1$-biharmonic $L_1$-finite type connected orientable Lorentzian hypersurface in $E_1^4$.
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伪欧几里得空间中的L_1 -双调和类时超曲面
Bang yan - chen的一个著名猜想是:双调和欧氏子流形是最小流形。本文研究了伪欧几里德空间E_1^4$上的非退化类时超曲面上的一个扩展条件(即$L_1$-双谐性)。如果满足条件$L_1^2x=0$,则称为$L_1$-双调和,其中$L_1$是与$M_1^3$上的第2平均曲率向量场的第一次变分相关的线性化算子。根据主曲率的多重性,在伪欧几里德空间E_1^4$中,对具有常平均曲率的洛伦兹超曲面,证实了Chen猜想的L_1 -推广。此外,我们还证明了$E_1^4$中不存在固有的$L_1$-双调和$L_1$-有限型连通可定向洛伦兹超曲面。
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CiteScore
1.50
自引率
0.00%
发文量
11
期刊介绍: To promote research interactions between local and overseas researchers, the Department has been publishing an international mathematics journal, the Tamkang Journal of Mathematics. The journal started as a biannual journal in 1970 and is devoted to high-quality original research papers in pure and applied mathematics. In 1985 it has become a quarterly journal. The four issues are out for distribution at the end of March, June, September and December. The articles published in Tamkang Journal of Mathematics cover diverse mathematical disciplines. Submission of papers comes from all over the world. All articles are subjected to peer review from an international pool of referees.
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