σk-Scalar curvature and eigenvalues of the Dirac operator

σk-Scalar curvature and eigenvalues of the Dirac operator
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σk-狄拉克算子的标量曲率和特征值

DOI:
10.1007/s10455-006-9022-z
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发表时间:
2006
影响因子:
0.7
通讯作者:
Guofang Wang
Guofang Wang
中科院分区:
数学4区
文献类型:
--
作者:
Guofang Wang

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在四维闭自旋流形(M4,g)上,Dirac算子的本征值可以由M4的全σ2-标量曲率估计如下: {\displaystyle\sigma_2(g)} d} {\rm vol}(g)}{{\rm vol}(M^4,g)}$$相等意味着(M4,g)是一个圆球,对应的本征旋量是Killing旋量。
AbstractOn a four-dimensional closed spin manifold (M4, g), the eigenvalues of the Dirac operator can be estimated from below by the total σ2-scalar curvature of M4 as follows: $$\lambda^4 \geq \frac{32}{3} \frac{\int_{M^4} \sigma_2 (g) {\rm d} {\rm vol} (g)}{{\rm vol} (M^4, g)}$$ Equality implies that (M4, g) is a round sphere and the corresponding eigenspinors are Killing spinors.