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Lower Bounds on Boundary Slope Diameters for Montesinos Knots

  • Ichihara, Kazuhiro (Department of Mathematics Education, Nara University of Education) ;
  • Mizushima, Shigeru (Department of Mathematical and Computing Sciences, Tokyo Institute of Technology)
  • Received : 2008.04.01
  • Accepted : 2008.07.01
  • Published : 2009.06.30

Abstract

In this paper, we give two lower bounds on the diameter of the boundary slope set of a Montesinos knot. One is described in terms of the minimal crossing numbers of the knots, and the other is related to the Euler characteristics of essential surfaces with the maximal/minimal boundary slopes.

Keywords

References

  1. R. J. Aumann, Asphericity of alternating knots, Ann. Math., 64(2)(1956), 374-392. https://doi.org/10.2307/1969980
  2. M. Culler and P. B. Shalen, Bounded, separating, incompressible surfaces in knot manifolds, Invent. Math., 75(1984), 537-545. https://doi.org/10.1007/BF01388642
  3. M. Culler and P. B. Shalen, Boundary slopes of knots, Comment. Math. Helv., 74(1999), 530-547. https://doi.org/10.1007/s000140050104
  4. M. Culler and P. B. Shalen, Knots with only two strict essential surfaces, Geometry and Topology Monographs, 7(2004), 335-430.
  5. C. Delman and R. Roberts, Alternating knots satisfy property P, Comment. Math. Helv., 74(1999), 376-397. https://doi.org/10.1007/s000140050095
  6. A. Hatcher, On the boundary curves of incompressible surfaces, Pacific J. Math., 99(1982), 373-377. https://doi.org/10.2140/pjm.1982.99.373
  7. A. Hatcher and U. Oertel, Boundary slopes for Montesinos knots, Topology, 28(4)(1989) 453-480. https://doi.org/10.1016/0040-9383(89)90005-0
  8. A. Hatcher and W. Thurston, Incompressible surfaces in 2-bridge knot complements, Invent. Math., 79(1985), 225-246. https://doi.org/10.1007/BF01388971
  9. K. Ichihara and S. Mizushima, Bounds on numerical boundary slopes for Montesinos knots, Hiroshima Math. J., 37(2)(2007), 211-252.
  10. K. Ichihara and S. Mizushima, Crossing number and diameter of boundary slope set of Montesinos knot, Comm. Anal. Geom., 16(3)(2008), 565-589 https://doi.org/10.4310/CAG.2008.v16.n3.a4
  11. T. W. Mattman, G. Maybrun and K. Robinson, 2-bridge knot boundary slopes: diameter and genus, Osaka J, Math., 45(2)(2008), 471-489.
  12. D. Rolfsen, Knots and Links, Publish or Perish, Berkeley, California.

Cited by

  1. Pairs of boundary slopes with small differences vol.20, pp.2, 2014, https://doi.org/10.1007/s40590-014-0021-y