Mathematics – Geometric Topology
Scientific paper
2006-10-16
Mathematics
Geometric Topology
21 pages, 13 figures, accepted by JKTR
Scientific paper
In this paper we define and give examples of a family of polynomial
invariants of virtual knots and links. They arise by considering certain
2$\times$2 matrices with entries in a possibly non-commutative ring, for
example the quaternions. These polynomials are sufficiently powerful to
distinguish the Kishino knot from any classical knot, including the unknot.
Bartholomew Andrew
Fenn Roger
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