Geometric K-Homology and Controlled Paths

Geometric K-Homology and Controlled Paths
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几何 K 同调和受控路径

DOI:
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发表时间:
1999
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通讯作者:
Navin Keswani
Navin Keswani
中科院分区:
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文献类型:
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作者:
Navin Keswani

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我们证明了定向黎曼流形M上的K-同调双曲算子可以通过一条算子的“控制路”连通。这些路径的解析性质允许我们测量一个缠绕数(在德拉哈尔佩和斯堪达利斯的意义上)。为了帮助在博览会中,我们开发了一个变体的鲍姆(M;E;F)模型的K-同源性。我们的模型消除了需要自旋c结构的几何K-同源性的描述。
We show thatK-homologous dierential operators on an oriented, Riemannian manifold M can be connected by a \controlled path" of operators. The analytic properties of these paths allows us to measure a winding number (in the sense of de la Harpe and Skandalis). To aid in the exposition we develop a variant of Baum's (M;E;f) model for K-homology. Our model removes the need for Spin c structures in the description of geometric K-homology.