Abstract
We derive a formula for the \({\bar\mu}\)-invariant of a Seifert fibered homology sphere in terms of the η-invariant of its Dirac operator. As a consequence, we obtain a vanishing result for the index of certain Dirac operators on plumbed 4-manifolds bounding such spheres.
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The first author was partially supported by NSF Grant 0804760. The second author was partially supported by the Max-Planck-Institut für Mathematik in Bonn, Germany.
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Ruberman, D., Saveliev, N. The \({\bar\mu}\)-invariant of Seifert fibered homology spheres and the Dirac operator. Geom Dedicata 154, 93–101 (2011). https://doi.org/10.1007/s10711-010-9569-5
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DOI: https://doi.org/10.1007/s10711-010-9569-5
Keywords
- Dirac operator
- Seifert fibered homology sphere
- \({\bar\mu}\)-invariant
- η-invariant
- Seiberg–Witten equations