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arXiv 1001.4441math.DG
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洛伦兹流形的曲率张量的一个分量

One component of the curvature tensor of a Lorentzian manifold

Anton S. Galaev

摘要:

允许各向同性线平行分布的$n+2$维洛伦兹流形$(M,g)$的完整代数$\g$包含在子代数$\simil(n)=(\Real\oplus\so(n))\zr\Real^n\subset\so(1,n+1)$中. $\g$的一个重要不变量是它的$\so(n)$ -投影$\h\subset\so(n)$,它是一个黎曼完整代数.流形的曲率张量的一个分量属于空间$¶(\h)$,该空间由从$\Real^n$到$\h$的线性映射组成,满足类似于Bianchi恒等式。本文对每个可能的$\h$计算了空间$¶(\h)$。这给出了流形$(M,g)$的曲率张量值的完整描述。这些结果可以应用于例如爱因斯坦洛伦兹流形的完整分类。

英文摘要:

The holonomy algebra $\g$ of an $n+2$-dimensional Lorentzian manifold $(M,g)$ admitting a parallel distribution of isotropic lines is contained in the subalgebra $\simil(n)=(\Real\oplus\so(n))\zr\Real^n\subset\so(1,n+1)$. An important invariant of $\g$ is its $\so(n)$-projection $\h\subset\so(n)$, which is a Riemannian holonomy algebra. One component of the curvature tensor of the manifold belongs to the space $¶(\h)$ consisting of linear maps from $\Real^n$ to $\h$ satisfying an identity similar to the Bianchi one. In the present paper the spaces $¶(\h)$ are computed for each possible $\h$. This gives the complete description of the values of the curvature tensor of the manifold $(M,g)$. These results can be applied e.g. to the holonomy classification of the Einstein Lorentzian manifolds.

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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