On a conjecture by Kauffman on alternative and pseudoalternating links

Topology and its Applications
Doi 10.1016/j.topol.2015.03.012
Volumen 188 páginas 82 - 90
2015-06-05
Citas: 3
Abstract
© 2015 Elsevier B.V.It is known that alternative links are pseudoalternating. In 1983 Louis Kauffman conjectured that both classes are identical. In this paper we prove that Kauffman Conjecture holds for those links whose first Betti number is at most 2. However, it is not true in general when this value increases, as we also prove by finding two counterexamples: a link and a knot whose first Betti numbers equal 3 and 4, respectively. In the way we work with the intermediate family of homogeneous links, introduced by Peter Cromwell.
Alternative links, Homogeneous links, Pseudoalternating links
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