Linking invariants of even virtual links

Haruko A. Miyazawa, Kodai Wada, Akira Yasuhara

研究成果: Article査読

1 被引用数 (Scopus)


A virtual link diagram is even if the virtual crossings divide each component into an even number of arcs. The set of even virtual link diagrams is closed under classical and virtual Reidemeister moves, and it contains the set of classical link diagrams. For an even virtual link diagram, we define a certain linking invariant which is similar to the linking number. In contrast to the usual linking number, our linking invariant is not preserved under the forbidden moves. In particular, for two fused isotopic even virtual link diagrams, the difference between the linking invariants of them gives a lower bound of the minimal number of forbidden moves needed to deform one into the other. Moreover, we give an example which shows that the lower bound is best possible.

ジャーナルJournal of Knot Theory and its Ramifications
出版ステータスPublished - 2017 10 1

ASJC Scopus subject areas

  • Algebra and Number Theory

フィンガープリント 「Linking invariants of even virtual links」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。