群作用下非紧带边流形上指标理论与Hopf循环上同调的研究
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1.A VANISHING THEOREM FOR THE MATHAI-ZHANG INDEX
- 关键词:
- G-equivariant elliptic operators; Mathai-Zhang index; vanishing theorem;proper action
- Zhang, Xin
- 《PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY》
- 2022年
- 150卷
- 11期
- 期刊
We establish a vanishing theorem for spin manifolds admitting proper cocompact Lie group actions. To be more precise, when the connected component of the identity element in the action group is non-unimodular, we prove that the Mathai-Zhang index [Adv. Math. 225 (2010), pp. 1224-1247] vanishes.
...2.Hodge theory for non-compact G-manifolds with boundary
- 关键词:
- Hodge theory; Manifolds with boundary; Proper action; Eulercharacteristic; Cyclic cohomology;HOPF CYCLIC COHOMOLOGY
- Zhang, Xin
- 《JOURNAL OF GEOMETRY AND PHYSICS》
- 2022年
- 180卷
- 期
- 期刊
We develop a generalized Hodge theory of invariant differential forms on non-compact manifolds with boundary which admit proper cocompact Lie group actions. As applications, we discuss properties of the Euler characteristic, the relative Euler characteristic and the Hopf cyclic cohomology for proper cocompact actions. (C) 2022 Elsevier B.V. All rights reserved.
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