Abstract
We show there exist tunnel number one hyperbolic –manifolds with arbitrarily long unknotting tunnel. This provides a negative answer to an old question of Colin Adams.
Citation
Daryl Cooper. Marc Lackenby. Jessica S Purcell. "The length of unknotting tunnels." Algebr. Geom. Topol. 10 (2) 637 - 661, 2010. https://doi.org/10.2140/agt.2010.10.637
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