The Volume of Hyperbolic Alternating Link Complements |
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Authors: | Lackenby Marc |
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Institution: | Mathematical Institute, University of Oxford 2429 St Giles', Oxford OX1 3LB. E-mail: lackenby{at}maths.ox.ac |
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Abstract: | If a hyperbolic link has a prime alternating diagram D, thenwe show that the link complement's volume can be estimated directlyfrom D. We define a very elementary invariant of the diagramD, its twist number t(D), and show that the volume lies betweenv3(t(D) 2)/2 and v3(10t(D) 10), where v3 isthe volume of a regular hyperbolic ideal 3-simplex. As a consequence,the set of all hyperbolic alternating and augmented alternatinglink complements is a closed subset of the space of all completefinite-volume hyperbolic 3-manifolds, in the geometric topology.2000 Mathematics Subject Classification 57M25, 57N10. |
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Keywords: | knot link alternating diagram hyperbolic volume |
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