Cusp volumes of alternating knots

  title={Cusp volumes of alternating knots},
  author={Marc Lackenby and Jessica S. Purcell},
  • Marc Lackenby, Jessica S. Purcell
  • Published 2016
  • Mathematics
  • We show that the cusp volume of a hyperbolic alternating knot can be bounded above and below in terms of the twist number of an alternating diagram of the knot. This leads to diagrammatic estimates on lengths of slopes, and has some applications to Dehn surgery. Another consequence is that there is a universal lower bound on the cusp density of hyperbolic alternating knots. 

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