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Taut foliations from knot diagrams (2402.01225v1)

Published 2 Feb 2024 in math.GT

Abstract: We prove that if a knot $K$ has a particular type of diagram then all non-trivial surgeries on $K$ contain a coorientable taut foliation. Knots admitting such diagrams include many two-bridge knots, many pretzel knots, many Montesinos knots and more generally all arborescent knots defined by weighted planar trees with more than one vertex such that $1)$ all weights have absolute value greater than one, and $2)$ there exists a weight with absolute value greater than two. The ideas involved in the proof can also be adapted to study surgeries on links and as an application we show that for all surgeries $M$ on the Borromean link it holds that $M$ is not an $L$-space if and only if $M$ contains a coorientable taut foliation.

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