Mathematics – Geometric Topology
Scientific paper
2010-10-29
Mathematics
Geometric Topology
52 pages, 1 figure
Scientific paper
We determine the lens spaces that arise by integer Dehn surgery along a knot in the three-sphere. Specifically, if surgery along a knot produces a lens space, then there exists an equivalent surgery along a Berge knot with the same knot Floer homology groups. This leads to sharp information about the genus of such a knot. The arguments rely on tools from Floer homology and lattice theory, and are primarily combinatorial in nature.
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