Mathematics – Geometric Topology
Scientific paper
2002-08-21
Mathematics
Geometric Topology
latex, 45 pages, 34 figures; a mistake pointed out by W.Menasco and A.Sikora has been corrected
Scientific paper
We prove that any arc-presentation of the unknot admits a monotonic
simplification by elementary moves; this yields a simple algorithm for
recognizing the unknot. We obtain similar results for split links and composite
links.
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