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arXiv 1101.0697math.KT
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系数为I的几何K-同调

Geometric K-homology with coefficients I

Robin J. Deeley

摘要:

我们构造了一个系数在$\mathbb{Z}/k\mathbb{Z}$中的$K$ -同调的Baum-Douglas型模型。循环中的基本几何对象是$spin^c$ $\mathbb{Z}/k\mathbb{Z}$ -流形。详细讨论了这些圈与Freed-Melrose指数定理的拓扑侧之间的关系。最后,利用归纳极限,我们构造了系数在任意可数阿贝尔群中的$K$ -同调的几何模型。

英文摘要:

We construct a Baum-Douglas type model for $K$-homology with coefficients in $\mathbb{Z}/k\mathbb{Z}$. The basic geometric object in a cycle is a $spin^c$ $\mathbb{Z}/k\mathbb{Z}$-manifold. The relationship between these cycles and the topological side of the Freed-Melrose index theorem is discussed in detail. Finally, using inductive limits, we construct geometric models for $K$-homology with coefficients in any countable abelian group.

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