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arXiv math/0609438math.OA
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锥伪流形的群胚和一个指标定理

Groupoids and an index theorem for conical pseudo-manifolds

Claire Debord, Jean-Marie Lescure, Victor Nistor

摘要:

定义了锥伪流形的解析指数映射和拓扑指数映射。这些构造推广了Atiyah和Singer在光滑紧致流形$M$的拓扑指数定理的证明中所使用的类似构造。一个主要成分是一个非交换代数,在我们的设置中扮演$C_0(T^*M)$的角色。本文证明了非交换代数之间的一个Thom同构,它给出了$K$ -理论中错误路函子性的一个新例子.然后,我们给出了一个新的证明的Atiyah-Singer指标定理使用变形群胚,并显示它如何推广到圆锥伪流形。从而证明了锥伪流形的一个拓扑指数定理。

英文摘要:

We define an analytical index map and a topological index map for conical pseudomanifolds. These constructions generalize the analogous constructions used by Atiyah and Singer in the proof of their topological index theorem for a smooth, compact manifold $M$. A main ingredient is a non-commutative algebra that plays in our setting the role of $C_0(T^*M)$. We prove a Thom isomorphism between non-commutative algebras which gives a new example of wrong way functoriality in $K$-theory. We then give a new proof of the Atiyah-Singer index theorem using deformation groupoids and show how it generalizes to conical pseudomanifolds. We thus prove a topological index theorem for conical pseudomanifolds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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