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arXiv 1704.04419math.GTmath.NT
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有理同调3-球面包围的定4-流形的交形式

On intersection forms of definite 4-manifolds bounded by a rational homology 3-sphere

Dong Heon Choe, Kyungbae Park

摘要:

证明了如果有理同调3-球面$Y$包围一个正定光滑4-流形,则在稳定等价之前,存在100多个负定格,这些格可以实现为由$Y$包围的光滑4-流形的交形式.为此,我们利用约束限定形式的$Y$诱导唐纳森的对角化定理,和校正项不变量由于Frøyshov,Ozsváth和Szabó。特别地,我们证明了所有的球面3-流形满足这样的有限性。

英文摘要:

We show that, if a rational homology 3-sphere $Y$ bounds a positive definite smooth 4-manifold, then there are finitely many negative definite lattices, up to the stable-equivalence, which can be realized as the intersection form of a smooth 4-manifold bounded by $Y$. To this end, we make use of constraints on definite forms bounded by $Y$ induced from Donaldson's diagonalization theorem, and correction term invariants due to Frøyshov, and Ozsváth and Szabó. In particular, we prove that all spherical 3-manifolds satisfy such finiteness property.

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