A Lichnerowicz vanishing theorem for the maximal Roe algebra
A Lichnerowicz vanishing theorem for the maximal Roe algebra
复制标题
最大罗伊代数的 Lichnerowicz 消失定理
DOI:
10.1007/s00208-021-02333-0
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发表时间:
2023
影响因子:
1.4
通讯作者:
Yu, Guoliang
中科院分区:
文献类型:
--
作者:
Guo, Hao;Xie, Zhizhang;Yu, Guoliang
We show that if a countable discrete group acts properly and isometrically on a spin manifold of bounded Riemannian geometry and uniformly positive scalar curvature, then, under a suitable condition on the group action, the maximal higher index of the Dirac operator vanishes inK-theory of the maximal equivariant Roe algebra. The group action isnotassumed to be cocompact. A key step in the proof is to establish a functional calculus for the Dirac operator in the maximal equivariantuniformRoe algebra. This allows us to prove vanishing of the index of the Dirac operator inK-theory of this algebra, which in turn yields the result for the maximal higher index.
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