Compact and long virtual knots
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V. O. Manturov
Translated by: G. G. Gould - Trans. Moscow Math. Soc. 2008, 1-26
- DOI: https://doi.org/10.1090/S0077-1554-08-00168-4
- Published electronically: November 19, 2008
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Abstract:
The theory of virtual knots is a generalization of the theory of classical knots proposed by Kauffman in 1996. In this paper solutions of certain problems of the theory of virtual knots are given. The first part of the paper is devoted to the representation of virtual knots as knots in 3-manifolds of the form $S_g\times I$ modulo stabilization. Using Haken’s theory of normal surfaces, a theorem is proved showing that the problem of recognizing virtual links is algorithmically soluble. A theorem is proved stating that (any) connected sum of non-trivial virtual knots is non-trivial. This result is a corollary of inequalities proved in this paper for the (underlying) genus of virtual knots. The last part of this paper is concerned with long virtual knots. By contrast with the classical case, the classifications of long and compact virtual knots are different. Invariants of long virtual knots are constructed with the help of which one can establish the inequivalence of long knots having equivalent closures and also that some pairs of long virtual knots do not commute.References
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Bibliographic Information
- V. O. Manturov
- Affiliation: Eniseiskaya Ulitsa, 16/21–34, Moscow 129344, Russia
- Email: vassily@manturov.mccme.ru
- Published electronically: November 19, 2008
- © Copyright 2008 American Mathematical Society
- Journal: Trans. Moscow Math. Soc. 2008, 1-26
- MSC (2000): Primary 57M25, 57M27; Secondary 57R65
- DOI: https://doi.org/10.1090/S0077-1554-08-00168-4
- MathSciNet review: 2549444