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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48.

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Bridge number, Heegaard genus and non-integral Dehn surgery
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by Kenneth L. Baker, Cameron Gordon and John Luecke PDF
Trans. Amer. Math. Soc. 367 (2015), 5753-5830 Request permission

Abstract:

We show there exists a linear function $w \colon \mathbb {N} \to \mathbb {N}$ with the following property. Let $K$ be a hyperbolic knot in a hyperbolic $3$–manifold $M$ admitting a non-longitudinal $S^3$ surgery. If $K$ is put into thin position with respect to a strongly irreducible, genus $g$ Heegaard splitting of $M$, then $K$ intersects a thick level at most $2w(g)$ times. Typically, this shows that the bridge number of $K$ with respect to this Heegaard splitting is at most $w(g)$, and the tunnel number of $K$ is at most $w(g) + g-1$.
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Additional Information
  • Kenneth L. Baker
  • Affiliation: Department of Mathematics, University of Miami, Coral Gables, Florida 33146
  • MR Author ID: 794754
  • Email: kb@math.miami.edu
  • Cameron Gordon
  • Affiliation: Department of Mathematics, The University of Texas at Austin, Austin, Texas 78712
  • MR Author ID: 75435
  • Email: gordon@math.utexas.edu
  • John Luecke
  • Affiliation: Department of Mathematics, The University of Texas at Austin, Austin, Texas 78712
  • Email: luecke@math.utexas.edu
  • Received by editor(s): February 1, 2012
  • Received by editor(s) in revised form: September 6, 2013
  • Published electronically: October 22, 2014
  • Additional Notes: In the course of this work the first author was partially supported by NSF Grant DMS-0239600, by the University of Miami 2011 Provost Research Award, and by a grant from the Simons Foundation (#209184). The first author would like to thank the Department of Mathematics at the University of Texas at Austin for its hospitality during his visits. These visits were supported in part by NSF RTG Grant DMS-0636643
    The second author was partially supported by NSF Grant DMS-0906276
  • © Copyright 2014 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 367 (2015), 5753-5830
  • MSC (2010): Primary 57M27
  • DOI: https://doi.org/10.1090/S0002-9947-2014-06328-9
  • MathSciNet review: 3347189