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Vassiliev invariants of quasipositive knots

Published online by Cambridge University Press:  25 September 2006

Sebastian Baader
Affiliation:
Department of Mathematics, ETH Zürich, Rämistrasse 101, CH-8092 Zürich, Switzerlandsebastian.baader@math.ethz.ch
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Abstract

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Quasipositive knots are transverse intersections of complex plane curves with the standard sphere $S^3 \subset {\mathbb C}^2$. It is known that any Alexander polynomial of a knot can be realized by a quasipositive knot. As a consequence, the Alexander polynomial cannot detect quasipositivity. In this paper we prove a similar result about Vassiliev invariants: for any oriented knot $K$ and any natural number $n$ there exists a quasipositive knot $Q$ whose Vassiliev invariants of order less than or equal to $n$ coincide with those of $K$.

Type
Research Article
Copyright
Foundation Compositio Mathematica 2006