Persistently laminar branched surfaces

Details Persistently laminar branched surfaces Persistently laminar branched surfaces

2010-08-16

arxiv.org/abs/1008.2680v1

Mathematics

Geometric Topology

Scientific paper

We define sink marks for branched complexes and find conditions for them to determine a branched surface structure. These will be used to construct branched surfaces in knot and tangle complements. We will extend Delman's theorem and prove that a Montesinos knot $K$ of length at least 3 has a persistently laminar branched surface unless it is equivalent to $K(1/2q_1,\, 1/q_2,\, 1/q_3,\, -1)$ for some positive integers $q_i$. In most cases these branched surfaces are genuine, in which case $K$ admits no atoroidal Seifert fibered surgery. It will also be shown that there are many persistently laminar tangles.

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