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math.GT2010
The -invariant of Seifert fibered homology spheres and the Dirac operator
Daniel Ruberman, Nikolai Saveliev
We derive a formula for the -invariant of a Seifert fibered homology sphere in terms of the eta-invariant of its Dirac operator. As a consequence, we obtain a vanishing resu…
math.GT2010
Instanton Floer homology for two-component links
Eric Harper, Nikolai Saveliev
For any link of two components in an integral homology sphere, we define an instanton Floer homology whose Euler characteristic is the linking number between the components of the…