L-space knots with tunnel number \(>1\) by experiment. (English) Zbl 1528.57002
Summary: In Dunfield’s catalog of the hyperbolic manifolds in the SnapPy census which are complements of L-space knots in \(S^3\), we determine that 22 have tunnel number 2 while the remaining all have tunnel number 1. Notably, these 22 manifolds contain 9 asymmetric L-space knot complements. Furthermore, using SnapPy and KLO we find presentations of these 22 knots as closures of positive braids that realize the Morton-Franks-Williams bound on braid index. The smallest of these has genus 12 and braid index 4.
MSC:
| 57K10 | Knot theory |
| 57K18 | Homology theories in knot theory (Khovanov, Heegaard-Floer, etc.) |
| 57K32 | Hyperbolic 3-manifolds |
| 57R58 | Floer homology |
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