Scharlemann and Schultens have shown that for any pair of knots K1 and K2, w(K1#K2) ≥ max{w(K1),w(K2)}. Scharlemann and Thompson have given a scheme for possible examples where equality holds. Using results of Scharlemann–Schultens, Rieck–Sedgwick and Thompson, it is shown that for K = #i=1nKi a connected sum of mp-small knots and K′ any non-trivial knot, w(K#K′) > w(K).
Hendricks, Jacob  1
@article{10_2140_agt_2004_4_1041,
author = {Hendricks, Jacob},
title = {Mp-small summands increase knot width},
journal = {Algebraic and Geometric Topology},
pages = {1041--1044},
year = {2004},
volume = {4},
number = {2},
doi = {10.2140/agt.2004.4.1041},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2004.4.1041/}
}
Hendricks, Jacob. Mp-small summands increase knot width. Algebraic and Geometric Topology, Tome 4 (2004) no. 2, pp. 1041-1044. doi: 10.2140/agt.2004.4.1041
[1] , Foliations and the topology of 3–manifolds III, J. Differential Geom. 26 (1987) 479
[2] , , Essential tangle decomposition from thin position of a link, Pacific J. Math. 179 (1997) 101
[3] , , Thin position for a connected sum of small knots, Algebr. Geom. Topol. 2 (2002) 297
[4] , , 3–manifolds with planar presentations and the width of satellite knots, Trans. Amer. Math. Soc. 358 (2006) 3781
[5] , , On the additivity of knot width, from: "Proceedings of the Casson Fest", Geom. Topol. Monogr. 7, Geom. Topol. Publ., Coventry (2004) 135
[6] , Thin position and bridge number for knots in the 3–sphere, Topology 36 (1997) 505
Cité par Sources :