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We exhibit an algorithm to determine the bridge number of a hyperbolic knot in the 3-sphere. The proof uses adaptations of almost normal surface theory for compact surfaces with boundary in ideally triangulated knot exteriors.

Geometric Topology · Mathematics 2012-03-29 Alexander Coward

We construct the first examples of asymmetric L-space knots in $S^3$. More specifically, we exhibit a construction of hyperbolic knots in $S^3$ with both (i) a surgery that may be realized as a surgery on a strongly invertible link such…

Geometric Topology · Mathematics 2021-01-06 Kenneth L. Baker , John Luecke

We give three algorithms to determine the crosscap number of a knot in the 3-sphere using $0$-efficient triangulations and normal surface theory. Our algorithms are shown to be correct for a larger class of complements of knots in closed…

Geometric Topology · Mathematics 2024-12-25 William Jaco , J. Hyam Rubinstein , Jonathan Spreer , Stephan Tillmann

Suppose M is a closed irreducible orientable 3-manifold, K is a knot in M, P and Q are bridge surfaces for K and K is not removable with respect to Q. We show that either Q is equivalent to P or $d(K,P) \leq 2-\chi(Q-K)$. If K is not a two…

Geometric Topology · Mathematics 2007-05-23 Maggy Tomova

We classify Dehn surgeries on (p,q,r) pretzel knots that result in a manifold of finite fundamental group. The only hyperbolic pretzel knots that admit non-trivial finite surgeries are (-2,3,7) and (-2,3,9). Agol and Lackenby's 6-theorem…

Geometric Topology · Mathematics 2014-10-01 D. Futer , M. Ishikawa , Y. Kabaya , T. Mattman , K. Shimokawa

In this paper, we explicitly construct large classes of incommensurable hyperbolic knot complements with the same volume and the same initial (complex) length spectrum. Furthermore, we show that these knot complements are the only knot…

Geometric Topology · Mathematics 2017-09-19 Christian Millichap

This paper concerns with a rigidity of core geodesics in hyperbolic Dehn fillings. For instance, for an $n$-cusped hyperbolic $3$-manifold $M$ having non-symmetric cusp shapes, we show any Dehn filling of $M$ with sufficiently large…

Geometric Topology · Mathematics 2019-10-25 Ian Agol , BoGwang Jeon

Concerning the set of exceptional surgery slopes for a hyperbolic knot, Lackenby and Meyerhoff proved that the maximal cardinality is 10 and the maximal diameter is 8. Their proof is computer-aided in part, and both bounds are achieved…

Geometric Topology · Mathematics 2012-02-21 Kazuhiro Ichihara

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…

Geometric Topology · Mathematics 2016-09-21 Marc Lackenby , Jessica S. Purcell

An ideal triangulation $\mathcal{T}$ of a hyperbolic 3-manifold $M$ with one cusp is non-peripheral if no edge of $\mathcal{T}$ is homotopic to a curve in the boundary torus of $M$. For such a triangulation, the gluing and completeness…

Geometric Topology · Mathematics 2016-11-01 Stavros Garoufalidis , Iain Moffatt , Dylan P. Thurston

Let M be a closed 3-manifold with a given Heegaard splitting. We show that after a single stabilization, some core of the stabilized splitting has arbitrarily high distance with respect to the splitting surface. This generalizes a result of…

Geometric Topology · Mathematics 2010-11-30 Marion Moore Campisi , Matt Rathbun

A 4-manifold is constructed with some curious metric properties; or maybe it is many 4-manifolds masquerading as one, which would explain why it looks curious. Anyway, knots in the 3-sphere with complete finite volume hyperbolic metrics on…

Differential Geometry · Mathematics 2016-02-05 Clifford Henry Taubes

It is known that a knot complement can be decomposed into ideal octahedra along a knot diagram. A solution to the gluing equations applied to this decomposition gives a pseudo-developing map of the knot complement, which will be called a…

Geometric Topology · Mathematics 2018-11-19 Hyuk Kim , Seonhwa Kim , Seokbeom Yoon

The conormal lift of a link $K$ in $\R^3$ is a Legendrian submanifold $\Lambda_K$ in the unit cotangent bundle $U^* \R^3$ of $\R^3$ with contact structure equal to the kernel of the Liouville form. Knot contact homology, a topological link…

Symplectic Geometry · Mathematics 2014-11-11 Tobias Ekholm , John Etnyre , Lenhard Ng , Michael Sullivan

We reconsider topological string realization of SU(N) Chern-Simons theory on S^3. At large N, for every knot K in S^3, we obtain a polynomial A_K(x,p;Q) in two variables x,p depending on the t'Hooft coupling parameter Q=e^{Ng_s}. Its…

High Energy Physics - Theory · Physics 2012-07-19 Mina Aganagic , Cumrun Vafa

In contrast with knots, whose properties depend only on their extrinsic topology in $S^3$, there is a rich interplay between the intrinsic structure of a graph and the extrinsic topology of all embeddings of the graph in $S^3$ . For…

Geometric Topology · Mathematics 2009-06-15 Erica Flapan , Hugh Howards

This paper is subsequent to [5]. In this paper, we extend the classification of hyperbolic Dehn fillings with sufficiently large coefficients by addressing the remaining case not covered in [5]. Specifically, by considering the case in…

Geometric Topology · Mathematics 2025-12-19 BoGwang Jeon

We apply the conormal construction to a hyperbolic knot $K \subset S^3$, and study the sutured contact manifold $(V, \xi)$ obtained by taking the complement of a standard neighbourhood of the unit conormal $\La_K \subset (ST^*S^3,…

Symplectic Geometry · Mathematics 2022-06-17 Côme Dattin

This monograph derives direct and concrete relations between colored Jones polynomials and the topology of incompressible spanning surfaces in knot and link complements. Under mild diagrammatic hypotheses that arise naturally in the study…

Geometric Topology · Mathematics 2013-11-14 David Futer , Efstratia Kalfagianni , Jessica S. Purcell

We define the property (D) for nontrivial knots. We show that the fundamental group of the manifold obtained by Dehn surgery on a knot $K$ with property (D) with slope $\frac{p}{q}\ge 2g(K)-1$ is not left orderable. By making full use of…

Geometric Topology · Mathematics 2020-04-01 Zipei Nie