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arXiv 1610.04033math.GTmath.SG
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生成奇异4-流形的扭曲和外科手术的不存在性

Nonexistence of twists and surgeries generating exotic 4-manifolds

Kouichi Yasui

摘要:

众所周知,对于任何奇异的单连通闭定向4-流形对,一个是通过扭曲一个紧可收缩子流形通过边界上的对合从另一个得到的。相反,在这里,我们证明了,对于每个正整数$n$,存在一个单连通闭定向4-流形$X$,使得对于任何紧(不一定连通)余维零子流形$W$与$b_1(\partial W)<n$,$X$上的所有光滑结构的集合不能通过扭曲$W$和改变胶合映射从$X$生成。作为一个推论,我们表明,不存在“普遍的”紧凑的4-流形$W$,使任何单连通封闭的4-流形$X$,所有光滑结构的$X$上的集合是从一个4-流形扭曲固定嵌入副本的$W$和不同的胶合地图。此外,我们对手术也给出了类似的结果。

英文摘要:

It is well known that for any exotic pair of simply connected closed oriented 4-manifolds, one is obtained from the other by twisting a compact contractible submanifold via an involution on the boundary. By contrast, here we show that for each positive integer $n$, there exists a simply connected closed oriented 4-manifold $X$ such that, for any compact (not necessarily connected) codimension zero submanifold $W$ with $b_1(\partial W)<n$, the set of all smooth structures on $X$ cannot be generated from $X$ by twisting $W$ and varying the gluing map. As a corollary, we show that there exists no `universal' compact 4-manifold $W$ such that, for any simply connected closed 4-manifold $X$, the set of all smooth structures on $X$ is generated from a 4-manifold by twisting a fixed embedded copy of $W$ and varying the gluing map. Moreover, we give similar results for surgeries.

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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