Characteristic numbers of positively curved spin-manifolds with symmetry

Characteristic numbers of positively curved spin-manifolds with symmetry
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具有对称性的正弯曲自旋流形的特征数

DOI:
10.1090/s0002-9939-05-07928-1
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发表时间:
2005
期刊:
arXiv: Differential Geometry
影响因子:
--
通讯作者:
Anand Dessai
Anand Dessai
中科院分区:
--
文献类型:
--
作者:
Anand Dessai

文献摘要

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设M为正截面曲率的自旋流形,维数为bbbb8。假设紧连通李群G平滑作用于M,证明了当G包含两个等价对合对时特征数a (M, TM)消失。
Let M be a spin-manifold of positive sectional curvature and dimension > 8. Suppose a compact connected Lie group G acts smoothly on M. We show that the characteristic number A(M, TM) vanishes if G contains two commuting involutions acting isometrically on M.