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arXiv math/0605321math.DGmath.OC
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关于一个Chen型黎曼不变量

On a Riemannian invariant of Chen type

Teodor Oprea

摘要:

在文[6]中,我们把Chen不等式看成是一个约束极大值问题,并给出了证明.本文引入了一个由Chen不变量得到的黎曼不变量,用k阶的里奇曲率代替截面曲率。在空间型$\widetilde{M}(c)$中的子流形M的情况下,这个不变量可以被估计,随着c和M在$\widetilde{M}(c)$中的中曲率而变化。在拉格朗日情形下,得到了这个不等式的一个改进.

英文摘要:

In [6] we proved Chen's inequality regarded as a problem of constrained maximum. In this paper we introduce a Riemannian invariant obtained from Chen's invariant, replacing the sectional curvature by the Ricci curvature of k-order. This invariant can be estimated, in the case of submanifolds M in space forms $\widetilde{M}(c)$, varying with c and the mean curvature of M in $\widetilde{M}(c)$. A improuvement of this inequality in the Lagrangian case is obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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