Journal article
Width is not additive
Geometry & topology, Vol.17(1), pp.93-156
05/08/2010
DOI: 10.2140/gt.2013.17.93
Abstract
Geom. Topol. 17 (2013) 93-156 We develop a construction suggested by Scharlemann and Thompson to obtain an infinite family of pairs of knots $K_{\alpha}$ and $K'_{\alpha}$ so that $w(K_{\alpha} # K'_{\alpha})=max{w(K_{\alpha}), w(K'_{\alpha})}$. This is the first known example of a pair of knots such that $w(K#K')<w(K)+w(K')-2$ and it establishes that the lower bound $w(K#K')\geq max{w(K),w(K')}$ obtained by Scharlemann and Schultens is best possible. Furthermore, the knots $K_{\alpha}$ provide an example of knots where the number of critical points for the knot in thin position is greater than the number of critical points for the knot in bridge position.
Details
- Title: Subtitle
- Width is not additive
- Creators
- Ryan BlairMaggy Tomova
- Resource Type
- Journal article
- Publication Details
- Geometry & topology, Vol.17(1), pp.93-156
- DOI
- 10.2140/gt.2013.17.93
- ISSN
- 1364-0380
- eISSN
- 1364-0380
- Language
- English
- Date published
- 05/08/2010
- Academic Unit
- Mathematics; Liberal Arts and Science Admin
- Record Identifier
- 9983985990502771
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