Mathematics – Geometric Topology
Scientific paper
2008-01-12
Mathematics
Geometric Topology
18 pages, 10 figures. The main theorem has been modified to include an additional hypothesis
Scientific paper
Wu has shown that if a link or a knot $L$ in $S^3$ in thin position has thin spheres, then the thin sphere of lowest width is an essential surface in the link complement. In this paper we show that if we further assume that $L \subset S^3$ is prime, then the thin sphere of lowest width also does not have any vertical cut-disks. We also prove the result for a specific kind of tangles in $S^2 \times [-1,1]$.
Tomova Maggy
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