On the \overline{𝜇}–invariant of rational surface singularities

Stipsicz, András

doi:10.1090/S0002-9939-08-09439-2

On the $\overline {\mu }$–invariant of rational surface singularities
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by András I. Stipsicz

Proc. Amer. Math. Soc. 136 (2008), 3815-3823

DOI: https://doi.org/10.1090/S0002-9939-08-09439-2

Published electronically: May 28, 2008

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Abstract:

We show that for rational surface singularities with odd determinant the $\overline {\mu }$–invariant defined by W. Neumann is an obstruction for the link of the singularity to bound a rational homology 4–ball. We identify the $\overline {\mu }$–invariant with the corresponding correction term in Heegaard Floer theory.

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