Properties of knots preserved by cabling

Details Properties of knots preserved by cabling Properties of knots preserved by cabling

2010-10-15

arxiv.org/abs/1010.3220v1

Mathematics

Geometric Topology

20 pages, 6 figures

Scientific paper

We examine geometric properties of a knot J that are unchanged by taking a (p,q)-cable K of J. Specifically, we relate w(K) to w(J), where w(K) is the width of K in the sense of Gabai. We use this information to demonstrate that thin position is a minimal bridge position of J if and only if the same is true for K, and more generally we show that any thin position of K is an "obvious" cabling of a thin position of J. We conclude by proving that J is meridionally small (mp-small) if and only if K is meridionally small (mp-small), and if J is mp-small and every non-minimal bridge position of J is stabilized, then the same is true for K.

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