W-invariants and Neumann–Siebenmann invariants for Seifert homology 3-spheres
W-invariants and Neumann–Siebenmann invariants for Seifert homology 3-spheres
复制标题
Seifert 同源 3 球体的 W 不变量和 Neumann-Siebenmann 不变量
DOI:
10.1016/s0166-8641(00)00103-6
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发表时间:
2001
影响因子:
0.6
通讯作者:
Masaaki Ue
中科院分区:
文献类型:
--
作者:
Y. Fukumoto;M. Furuta;Masaaki Ue
We give a reciprocity formula for w-invariants for homology 3-spheres defined by Fukumoto and Furuta, which enables us to compute these invariants recursively. Using this formula, we show that the w-invariant for a Seifert homology 3-sphere (together with a specific spin V 4-manifold bounded by it) equals its Neumann–Siebenmann invariant up to sign. This implies that the Neumann–Siebenmann invariant for a Seifert homology 3-sphere is a homology cobordism invariant if it has either at most six singular fibers or has a singular fiber of even multiplicity.