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arXiv math/0110301math.GT
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嵌入球与具有自旋覆盖的4-流形

Embedded spheres and 4-manifolds with spin coverings

Christian Bohr

摘要:

一种在实现给定同调类的4-流形中构造嵌入球面的策略在过去已经成功应用,该策略是通过嵌入球面稳定地表示该类作为第一步,即在添加2-球面的乘积之后,并将该球面移回原始流形。在本文中,我们研究在什么条件下,这种方法的第一步可以进行,如果手头的4-流形不是单连通的。我们的主要结果之一是,有-除了众所周知的Arf不变-额外的边界理论障碍,稳定地表示嵌入式领域的同源类。

英文摘要:

A strategy for constructing an embedded sphere in a 4-manifold realizing a given homology class which has been successfully applied in the past is to represent the class as a first step stably by an embedded sphere, i.e. after adding products of 2-spheres, and to move that sphere back into the original manifold. In this paper, we study under what conditions the first step of this approach can be carried out if the 4-manifold at hand is not simply connected. One of our main results is that there are - apart from the well known Arf invariant - additional bordism theoretical obstructions to stably representing homology classes by embedded spheres.

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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