On the mu-bar invariant of rational surface singularities

Details On the mu-bar invariant of rational surface singularities On the mu-bar invariant of rational surface singularities

2007-11-12

arxiv.org/abs/0711.1850v2

Mathematics

Geometric Topology

12 pages, minor mistakes corrected

Scientific paper

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

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