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arXiv math/0412363math.ATmath.KT
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高阶特征标与3-流形群的同伦不变性

Homotopy invariance of higher signatures and 3-manifold groups

Michel Matthey, Hervé Oyono-Oyono, Wolfgang Pitsch

摘要:

对于闭的定向流形,我们建立了来自一大类可定向三维流形的基本群的高阶特征标的定向同伦不变性,包括Thurston意义下的“分片几何”流形.特别是,这个类,将仔细描述,是类的所有定向3-流形,如果瑟斯顿几何化猜想是真的。事实上,对于这类群,我们证明了有系数的鲍姆-康纳斯猜想成立。还讨论了无定向的情况。

英文摘要:

For closed oriented manifolds, we establish oriented homotopy invariance of higher signatures that come from the fundamental group of a large class of orientable 3-manifolds, including the ``piecewise geometric'' ones in the sense of Thurston. In particular, this class, that will be carefully described, is the class of all orientable 3-manifolds if the Thurston Geometrization Conjecture is true. In fact, for this type of groups, we show that the Baum-Connes Conjecture With Coefficients holds. The non-oriented case is also discussed.

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