On tunnel numbers of a cable knot and its companion

18 Feb 2020 Wang Junhua Zou Yanqing

Let $K$ be a nontrivial knot in $S^{3}$ and $t(K)$ its tunnel number. For any $(p\geq 2,q)$-slope in the torus boundary of a closed regular neighborhood of $ K$ in $S^{3}$, denoted by $K^{\star}$, it is a nontrivial cable knot in $S^{3}$... (read more)

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  • GEOMETRIC TOPOLOGY