#### Volume 11, issue 4 (2011)

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An algorithm for finding parameters of tunnels

### Kai Ishihara

Algebraic & Geometric Topology 11 (2011) 2167–2190
##### Abstract

Cho and McCullough gave a numerical parameterization of the collection of all tunnels of all tunnel number 1 knots and links in the $3$–sphere. Here we give an algorithm for finding the parameter of a given tunnel by using its Heegaard diagram.

##### Keywords
unknotting tunnel, Heegaard diagram, parameter of tunnel
Primary: 57M25
Secondary: 57N10
##### Publication
Received: 17 November 2009
Revised: 17 May 2011
Accepted: 30 May 2011
Published: 29 July 2011
##### Authors
 Kai Ishihara Department of Mathematics Imperial College London London SW7 2AZ UK