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arXiv 0812.4508math.DG
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T-结构与Yamabe不变量

T-structure and the Yamabe invariant

Chanyoung Sung

摘要:

Yamabe不变量是闭光滑流形的不变量,其中包含有关其上可能的数量曲率的信息。众所周知,积流形T^m \times B,其中T^m$是m维环面,B是非零\hat{A} -亏格的闭自旋流形,Yamabe不变量为零。我们将它推广到各种T-结构流形,例如B上的T^m-丛,其转移函数取值于Sp(m,Z)(或Sp(m-1,Z)\oplus \pm 1,对于奇数m)。

英文摘要:

The Yamabe invariant is an invariant of a closed smooth manifold, which contains information about possible scalar curvature on it. It is well-known that a product manifold T^m\times B where T^m$ is the m-dimensional torus, and B is a closed spin manifold of nonzero \hat{A}-genus has zero Yamabe invariant. We generalize it to various T-structured manifolds, for example T^m-bundles over such B whose transition functions take values in Sp(m,Z) (or Sp(m-1,Z)\oplus \pm 1 for odd m).

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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